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Meet our Amazing Virtual Coaches


Mislav Leko - Soccer Coach [Multilingual English/Croatian+Serbian]

I’m am a former pro soccer player with more than 150 professional matches on a very high level in Europe for over 13 years. Through my professional career, I played in Croatia, Romania and Norway with or against some of the best players in the world (Luka Modric and many more). Holding a BSC in Sports Management and recently moved to New York! I have been coaching at local elementary schools through NYC football club and love sharing my passion knowledge with youth.

Noah Keats - Soccer Coach

I Played and coached soccer at a professional level in England and America. As well as playing NCAA division 1 soccer and representing my national team (England) at university level. I am a highly experienced coach and player. I coached with Southampton FC who are in the English premier league and Lonestar soccer club in Texas. I taught soccer at local elementary schools all over West England before moving to the US and really enjoy sharing my expertise with youth and inspiring all young soccer players to work hard to reach their potential.  I am also an experienced fitness coach and personal trainer.


  • PDL team of the year 2016
  • WAC conference team of the year 2016
  • Represented England at university level 
  • Name appeared on 2017 FA Cup Final Ball 

 Coaching Qualifications:

  • English FA level 2 in coaching soccer 
  • USSF D license in coaching soccer
  • NASM certified personal trainer

Pedro Goncalves - Soccer Coach [Bilingual English/Portuguese]

My name is Pedro Goncalves and I am from Rio de Janeiro, Brazil. I have been living in the U.S for the past five years and am currently in St Petersburg, Florida. I speak Portuguese as my native language, English fluently after receiving two College degrees and Spanish Advanced. 

I consider myself very energetic and passionate about life. I believe in hard work, to have joy for sports and passion for what you do. I love challenges and new experiences. I got fascinated by youth development recently after being able to work at Ronaldo Soccer  Academy in Tampa right after graduating from a NCAA college playing soccer at the highest level. 

I am very fortunate for all the experiences that I have had in soccer throughout these five years, and in the process of becoming a professional soccer player I would love to give it back to the community by being able to make part of the development of youth soccer players.  This is the main reason why I chose to apply at Kassirer Sports and why I am so excited to make a difference and help other athletes achieve their goals such as I did by getting a Associate’s and Bachelor’s degree while following a professional career in soccer and pursuing my Master’s degree!

Judith Salazar - Soccer Coach [Bilingual English/Spanish]

 Coach Salazar is entering her second year as the girls’ varsity assistant coach for Lebanon Trail High School.  Lebanon Trail High School girls' soccer is ranked #3 in the state of Texas for 5A schools. Coach Salazar has taught at Travis B. Bryan High School in Bryan ISD for a year prior to being hired as the varsity boys assistant for Lebanon Trail and then switching over to the girls side. Coach Salazar played club soccer at Texas State University. In the Texas Collegiate Soccer League during her freshman year her team advanced to the regional final. She was captain for two years playing against UT, Texas Tech,  University of Houston, etc. She volunteered for the youth soccer program SMAYSO in San Marcos, 

Coach Salazar graduated from Texas State University with her bachelors in Exercise Science. She recently earned her masters from the University of North Texas and is currently working on her PhD. Coach Salazar grew up in Mount Pleasant where she played soccer from the age of 6.  She helped establish a varsity program at Mount Pleasant High School that is now a perennial playoff contender in 5A soccer. In her free time she enjoys working out, shopping, spending time with family and friends, and attending Gateway Church. Judith is fluent in Spanish.

Judith is our bilingual soccer coach English/Spanish  for Little Soccer & Soccer Ball Mastery & Footwork.

Maxime Desplan - Soccer Coach [Bilingual English/French]

 Born and raised in New York in a French household, Maxime was exposed to soccer at a young age and played throughout his life. In high school, he was the captain of the varsity team at the United Nations International School. After graduation,  he attended New York University and along his studies, started coaching at New York International Soccer Club. After that he moved on to Paris Saint Germain Academy New York and coached players from the ages of 5-17. He is now the General Manager and coach at the  French Football Academy, an elite soccer club based in NY. 

Coaching Experience

  • Head Coach, French Football Academy             
  • Community Coach, New York City Football Club (NYCFC)
  • Head Coach, Paris Saint Germain Academy NY             
  • Head Coach, New York International Soccer Club


Sami Czarnecki - Tennis Coach

I am originally from Sioux Falls, South Dakota. I have been playing tennis since I was about 6 years old and have always had a love for the game. My Senior year of High School I was awarded "Most Winningest Player" in South Dakota, and am currently at Rockhurst University in Kansas City on a tennis scholarship.   

Besides my love for tennis, I also have a love for teaching kids. After graduating Rockhurst this spring I will become an Elementary Education teacher. I am very excited to teach young athletes who also share a passion for tennis. My motto is that there is always room to grow and improve in your abilities on and off the tennis court. 

Calvin Le - Tennis Coach [Bilingual English/Vietnamese]

 Hi, I'm Calvin Le. I started playing tennis since 2010 with my friends after work at Miramar College Tennis Court. I improve my tennis skills by taking classes, reading books and watching tournament videos online. I also volunteer as an assistant coach at Miramar College for one semester. I play with all kinds of players ranging from beginners to advance. Currently, I'm teaching for Youth League Tennis since January 2020. In my spare time, I love to travel, run marathons, and spending time with my family and friends. I'm passionate about tennis and helping kids learn how to play and become better players.

Bill Marentette - Tennis Coach

 My name is Bill Marentette. Grew up in South Bend,Indiana, graduated from Ball State university and have lived in Southern California since 1982. I have played tennis and basketball since I was on the tennis team in high school where we won The State Championship. I am now retired from the corporate world but am still very active in basketball, tennis , golf and other activities to keep me happy and healthy. I have been married for 39 years, have 3 kids, 4 grandkids who keep me young and active and in touch with the younger generation. I enjoy coaching all sports and am a hands on and lead by example type of coach.

Adrielle Morante - Basketball & Tennis Coach [Bilingual English/Tagalog]

I have worked with Kassirer Sports & Youth League tennis for 8 years.  I grew up playing youth & high school athletics in San Francisco, Bay Area, California & I was awarded “Most Inspirational Player” by my coach Raymond Wong, as an athlete for leadership. My mission is to serve the community and youth to challenge themselves to become the best version of themselves by focusing on mastering fundamental movement skills. 

I attended Skyline College to obtain an associate’s degree in allied health science. While going to school, I developed a passion for working in the health & fitness industry. I worked at Sports Club/ LA San Francisco, and transitioned over Equinox Sports Club as a Sports Manager. I want to pass on to my students that you can grow through the adversity you face playing sports,  “It strengthens competitiveness, personal and professional values, self-assessment, teamwork, leadership, empathy, and emotional control. Through sports, I believe that it can help navigate relationships with others, and with ourselves as well as how to understand how our emotions can change the way you live and love.”   In my spare time, Adrielle loves to spend his time being active through basketball, cycling,  weightlifting, and adventures with his super dog, Biggins. I hope my students are able to grasp the concept of how to associate E.I. and reflective practice with applied sports or fitness performance.  My primary goal is to develop a positive inviting environment for students to grow.

Angelo Cardenas - Tennis Coach

My name is Angelo Cardenas. I’m 23 years old and have been teaching tennis to kids/teens since my junior year of high school. I played Varsity tennis at Concord High School all 4 years earning awards such as MVP for 3 years & Athlete of the Month for 4 months at my school. I then continued to play at the community college level at Diablo Valley College(DVC) where in my first year I was the #6 player and played doubles as well.  In my Second Season I was the #1 player at the school where I made the State Tournament in Ojai, CA in doubles. From 16 years old until now, I’ve taught various amounts of tennis camps at Oakhurst Country Club, Paragon tennis in Orinda, through the Kassirer Sports and Youth League tennis programs, as well as private lessons to kids ranging from 6-17 years old.


Michael Hsu - Basketball Coach [Bilingual English/Mandarin]

My coaching career began in 2005 with Beijing Aoshen Olympians. It was a professional team from China that developed many players to play for the national team. We even developed a player named Sun Yue to make it to the NBA. I worked for them for 6 years as the assistant coach and skills trainer. During the period, I was very fortunate to learn from many great coaches like Phil Jackson (NBA's most championship winning coach), Pete Carril (former Sacramento King's assistant coach, famous for his Princeton Offense), Paul Coughter (FIBA Coach of the Year in 2006, legendary coach in Asia), Bill Tosheff (first NBA Rookie of the Year award winner, Indiana University Basketball Hall of Famer), Mike McGee (won 2 NBA championships with the Lakers in 1982 and 1985), etc. 

During the years from 2006 to 2010, I was also the basketball trainer of Sun Yue and Songtao Zhang. Both are Chinese National team players. Sun Yue was playing for Los Angeles Lakers from 2008-2009, and later on with New York Knicks and Washington Wizards. I was able to attend and observe all of their practices, trainings, meetings, and games during the time he was with those NBA teams.

From 2011 to 2015, I was running my own basketball agency/academy based in Covina, California. Other than representing players and coaches, we also did a lot of player skill development and camps for college and pro players, as well as youth athletes. We had done many basketball exposure tours to participate in many international exhibition games and tournaments in the countries like Mexico, Philippines, Japan, Taiwan, Indonesia, and China, as well as hosting basketball clinics in those countries. 

I’ve been continually coaching basketball and training players after I settled down in Pleasanton since 2016. Other than the local AAU teams I've been coaching, I have also started to coach basketball with Kassirer Sports since 2018. 

Nic Carpino - Basketball Coach

 Nic is from Laguna Beach, CA and is currently a third-year student at Santa Clara University where he plays on the SCU Ice Hockey team. In high school, Nic played basketball and ice hockey while also coaching youth sports at the Boys and Girls Club of Laguna Beach; Nic oversaw numerous areas of instruction including study sessions and outdoor activities. For three years, Nic was the head coach of a Boys Basketball Team (3rd-6th grade). As a college student, Nic is eager to continue coaching and helping youths develop as players and individuals at Kassirer Sports. 

Raffney Nanquil - Basketball & Fitness Coach

I have been a sports enthusiast my entire life, was a two-sport athlete in high school and have continued that passion with 10+ years in coaching and training. I have worked in all spectrum of youth sports and have trained highly competitive athletes ranging from all ages. I combine my passion for sports with health, wellness and fitness. I help develop my athletes with focus on improving skills, form, and performance. I am currently the sports league coordinator and exercise specialist at Yahoo and have worked in other big name corporate companies as a trainer and sports commissioner, I also have referee and officiating experience in multiple sports.

Jared Moore - Basketball & Speed+Agility Coach

 Hello everyone my names Jared Moore and I have an extensive athletic career starting basketball when I was 9 in the Ymca to playing for the top aau team in the nation ages 11-14 where we won 2 national championships. I attended J Serra freshman to sophomore year and played football along with basketball. I transferred to Dana Hills for the following 2 years and my senior year I led the team in scoring and rebounding. 

I attended Santa Barbara city college to continued playing basketball, but after playing 2 years I  decided to just focus on school and my future in coaching. I have been working with and coaching kids for over 10 years now.  I am still in school to obtain my Bachelors in Kinesiology where I plan to continue my passion in coaching.



Gleidson Hoffmann aka "Mr. G" - Ballet Instructor [Bilingual English/Spanish]

Gleidson Vasconcelos  "Mr G" is an award winning dancer, teacher and choreographer. The Brazilian-American dancer was born in Minas Gerais, Brazil. He started dancing at the age of 11 at Studio Arte Dança and at Ballet Liudmila Palonskaya in Brazil, he later graduated from The Harid Conservatory in Florida. Mr.Hoffmann’s professional performance experiences include Sesi-Minas Compania De Danca, Canada’s Royal Winnipeg Ballet, Cuban Classical Ballet of Miami, Ballet Arizona, Jose Mateo Ballet Theatre and New Jersey Ballet.

Teaching experiences include, The Rock School For Dance Education, Princeton Dance and Theatre, Master Ballet Academy, Arizona Dance Project, Philadelphia High School for Performing and Creative Arts, Philadelphia Dance Theatre, Highspire Ballet Academy, Ballet Tech,Dance Theatre of Harlem and Greenwich Classical Conservatory Ballet. Gleidson Hoffmann has successfully completed the American Ballet Theatre® Teacher Training Intensive in Pre-Primary through Level 7 of the American Ballet Theatre National Training Curriculum. 

His repertoire includes ensemble roles and leading roles in Le Corsaire, La Bayadere, Sleeping Beauty, The Nutcracker, Swan Lake, Don Quixote, Paquita, The Harlequinade, La Esmeralda, Giselle, Coppelia, Romeo and Juliet, Flames of Paris, La Vivandiere, The Fairy Doll, Cinderella, The Cavalry Halt, Serenade, Stravinsky Violin Concerto, Concerto Barroco, Carnival of the Animals, Carmen, Porgy and Bass, Raymonda, Petit Elfs, Blue Danube Waltz, Staccato, La Fille Mal Gardee, Excerpt from my Life, Charlie Chaplin, Time out of Memory, Mambo Italiano, Topia, and Diversions. 

His awards and honors includes a Gold Medal and Best Choreography Award at World Ballet Competition, USA, a Silver Medal at Youth American Grand Prix Finals NY, USA, the Rudolf Nureyev Award from Rudolf Nureyev Foundation, USA and the Jeannot B. Cerroni Outstanding Artist in Performance Award from the Harid Conservatory, USA.  

Mr G will be teaching all of our Ballet classes. 

Carolina Tavarez - Ballet Instructor [Bilingual English/Spanish]

 Carolina was born in the US but grew up in the Dominican Republic. She is a former Ballet Dancer at Ballet Arizona, where she danced professional in numerous roles from the classical repertoire such as  La Bayadere, Romeo and Juliet,  The Nutcracker  Swan Lake, and Balanchine’s Four Temperaments, Waltzpargisnacht, Episodes, Stravinsky, Serenade, and Western Symphony. She received her pre-professional training at The Washington School of Ballet where she was awarded several scholarships and participated in competitions such as YAGP and World Ballet Competition. Currently, she is working her Yoga teacher training certification and recently graduated  from Arizona State University with a Bachelor's in Nutrition. She has taught Ballet and Creative Movement for nine years around the valley and at DanceAZ,  a nonprofit after school program. She was inducted member at the Nation Society of Leadership and Success, and she is a recipient of the Actors-Dancers College Education Fund Scholarship. She is excited to work with kids from all over the country throrgh this new platform.

Papa-Kobina Brewoo - Hip-Hop Dance Instructor

Papa-Kobina Brewoo, or Kobina, was born and raised in Accra, Ghana and moved to Madison, WI in 2001 with his family, in hopes for better education and more opportunities to help his family back home. It was in the 8th grade that he found his love for hip-hop upon stumbling across the TV show America's Best Dance Crew. Inspired by how the dancers expressed themselves through movement and music, he began watching YouTube videos as a start on his journey to become a hip-hop dancer. Since then, Papa-Kobina has appeared on MTV's Made, auditioned for ABDC, AGT, WOD and signed with DanceOn Network. On top of that, Papa-Kobina has won countless awards and competitions throughout the midwest.  He feels blessed by all the opportunities he has had, and continues to work towards earning his stripes as a dancer.  

Liliana Wilcockson - Hip-Hop & Ballet Instructor

Born and raised in Los Angeles, Liliana realized early on that dance was the ultimate way for her to fully express herself. Once a shy child, she attributes dance and musical theatre classes for instilling her with confidence and transforming her into the optimistic, outgoing person she is today. After earning her B.F.A. in Musical Theatre at Texas State University, she went on to dance and sing at various theaters around the nation as well as on the seas with Norwegian Cruise Line. When she is not on stage, she finds fulfillment in passing along her passion for dance to the next generation of performers! She looks forward to the opportunity to dance with kids around the nation through Kassirer Sports.

Lauren Frazier - Hip-Hop & Ballet Instructor

Lauren Frazier is a New York and New Jersey based dancer, singer, and actor. Lauren has been studying dance and performing for 15 years. A recent graduate of Fordham University, she has been able to study at the London Dramatic Academy, the Rockette Summer Intensive, Broadway Dance Center, New Jersey Ballet, and Broadway Dance Theatre. Lauren is also training privately with her mentor Rhonda Malkin. She has also studied voice under Tom Smargiassi, Linda Smargiassi, and Elaine LaChica. Performance credits include The TempestWest Side StorySouth PacificBye, Bye, BirdieCrazy for YouGuys and Dolls, and Legally Blonde, the musical. Living in New York during her time at Fordham, Lauren has performed at Carnegie Hall, Madison Square Garden, and  NYU Skirball. She also can be seen in episodes of MTV's Singled Out. Lauren is currently auditioning for professional shows in New York and is excited to bring her passion for the arts and knowledge to Kassirer Sports!

Marcela Estrada - Zumba Instructor [Bilingual English/Spanish]

Originally from Cali, Colombia, her background includes Modern Rhythms as well as Advertising & Design. AFAA Group Fitness Certified and Licensed Zumba® Fitness Instructor & ZIN™ member since August 2009. She’s proud to have played a key role in the huge success of the Zumba® Fitness program around the PA areas opening the door for the arrival of several talented Zumba® Fitness Instructors.  In October 2010, she founded Marcela’s Studio a fitness place where the Zumba party got a new meaning. Licensed in six Zumba® specialties and attended several International Zumba® Fitness Instructor Conventions, as well as numerous Master Classes worldwide.  In 2011, Marcela began teaching her own Zumba Master Classes, and has subsequently taught several in the U.S. & abroad, including exotic locations such as Grand Cayman Islands & Mexico. She has also had the privilege of sharing the stage with many amazing Zumba® Fitness icons. 

Throughout her Zumba® Fitness career, Marcela has proudly given back, helping raise awareness & funds for such amazing causes as the National Wildlife Federation, the American Red Cross [Relief for victims of the Tsunami in Japan], Invisible Children, Toys for Tots, the Little Hearts Foundation , Make A Wish, Susan G. Komen, Relay For Life and most recently Here for the Girls and Community Actions Against Drugs.

In 2014 she had the honor among other talented instructors, of opening the Bret Michaels  concert in DuBois PA, and most recently she has been featured on Zumba®  videos. 

Currently, Marcela resides in Hughson, CA and is proficient at virtual teaching. She travels often to VA, PA and other areas for classes, Master Classes and benefit events.

Web page:

Kaila DeRienzo - Fitness Coach & Hip-Hop Dance Instructor

 Kaila is proof that you're never too young to start being active! At the age of three, her parents enrolled her in dance classes. She grew up practicing ballet, tap, jazz, and hip hop. As she got older, Kaila added traditional sports into the mix by becoming a volleyball and basketball player- often juggling all three activities at once! She continued these activities all the way through high school. Kaila attended Penn State University and graduated in 2012. Although she chose a major outside of athletics, modern and lyrical dance classes were a big part of her collegiate life.

Aside from working her day job in the corporate communications industry, Kaila has coached more than 1,200 group fitness classes, specializing in strength and endurance training, over the past two years for some well-recognized fitness companies. She's completed five half marathons (and counting!), countless 5k and 10ks, and is on a sponsored running team for the 2020/2021 racing season.

Kaila is a National Academy of Sports Medicine Certified Personal Trainer and Performance Enhancement Specialist. She's also an Athletics and Fitness Association of America Certified Group Fitness Instructor. 

Kaila is coaching Sports Speed & Agility training,  HITT classes and Hip Hop Dance Classes.


DJ Jones - Speed + Agility Coach

David (D.J.) Jones II, BA, CPT, CSN

Coach, Personal Trainer and Wellness Advocate, D.J. Jones is looking forward to meeting all of his students who are participating in Kassirer Sports. His lists of unique skillsets include: Individual and Group Training, Speed and Agility Coaching, Sports Nutrition Management and Kickboxing Fitness.

Graduating from Omaha Central High School, D.J. was Named the #1 High School Football Player in the State of Nebraska in 2006, while also ranking in the Top 25 in the nation at his position. He then earned many college scholarships, before accepting the opportunity to become a Student-Athlete at the University of Nebraska, where he competed for 4 years as a Husker Offensive Lineman. Upon graduating in 2010, he went on to play football in the NFL with the Miami Dolphins, Baltimore Ravens and Philadelphia Eagles. After almost 3 seasons, despite his athletic potential, D.J. chose to retire sooner than expected due to a spine injury.

After becoming certified in Personal Training and Sports Nutrition, D.J. developed many youth sports programs, including the Kassirer Sports inaugural after school “Sports Agility” program in Orange County, California. This program tailored to educating young student-athletes on the fundamentals of speed and agility, making it relative and transferrable to all sports.  

Client Rated “5 Star Coach” via, D.J. has served over 500 clients, offering quality as well as an abundance of knowledge to the people he has encountered. Between facilitating the goals of large groups, and critiquing the individual skillsets in personal training sessions, D.J. aims to offer the appropriate education, opportunity, and exposure to assist his clients in meeting their personal goal

Hayley Pettinato - Fitness Coach

 I am a NASM certified personal trainer and certified spin instructor with over a year of experience coaching group fitness and indoor cycling classes. I am well-versed in energizing and motivating clients throughout sessions, ensuring the safety of participants in regards to heart rate and exercise technique, and modifying specific exercises to accommodate various skill levels. During the quarantine, I've conducted live virtual workouts to a wide range of clientele with differing skill sets, equipment, goals, etc. I am also the creator and host of the Philosophy of Fitness Podcast, where I explore all aspects of the mind-body connection from differing perspectives!

Vote for Hayley to appear on the cover!

One of my podcasts about the history of women in fitness:

Hayley is coaching Fun Fitness, HIIT and Full Body Fitness classes.

Emily Vazquez - Fitness Coach

 Emily is a Certified Personal Trainer through ACE (American Council on Exercise) and earned her Bachelor of Science from Florida State University. She is currently Head Coach at Orangetheory Fitness in Delray Beach, FL. She trains all types of clientele, ranging from unconditioned older clients to young clients focusing on improving their specific sport. She enjoys helping others reach their fitness goals, realize their full potential, and ultimately change mindset and habits. When she is not coaching or working out, Emily enjoys taking her two chocolate labs on long walks, trying out new healthy recipes, cheering on her Florida State Seminoles, and traveling!

Emily is coaching Full Body Fitness, HIIT and Fun Fitness classes.

Jamie Hooper - Fitness & Speed+Agility Coach

My passion for fitness started in high school competing in tennis and taking kickboxing classes, but blossomed a few years after college upon losing 35 pounds of excess weight. By personally developing and committing to a balanced nutrition and exercise plan, I achieved my goal, but learned an important life lesson: There is something special about building relationships to motivate and inspire others and yourself. This experience led me to become a certified ACE Group Fitness Instructor and Certified Spinning Instructor.  I have been instructing with Lifestart Wellness Network and Orangetheory Fitness for almost 2 years now and I strive to motivate and help others achieve their goals by sharing my story and insights.

Jamie is coaching Full Body Fitness, HIITS and Fun Fitness classes, as well as Sports Speed & Agility classes.

Lau Macchiavelli - Fitness Coach [Bilingual English/Spanish]

 An avid swimmer from the time she can remember, Lau grew up swimming competitively. The team practices and coaching gave her a strong foundation in the importance of being active and healthy. However, her love for training really began when she had to learn how to workout without a swim team and swim coach helping cheer her on. 

Lau found group fitness in college, and enjoyed the community so much she decided to become an instructor! Certified as a personal trainer through ACE Fitness, Lau has spent time working with clients on an individual basis as well as in a group atmosphere. A full time coach at Orangetheory Fitness, Lau prioritizes educating others on proper form, techniques, and making healthy, sustainable changes for life. Lau is excited to create a safe and welcoming space for kids to navigate through virtual training- whether for performance improvement or overall health. 

Lau is coaching Full Body Fitness and Full Body Fitness Bilingual class  (English + Spanish)

Mikaelle (Mika) Braga - Fitness Coach

I have been involved in the Fitness & Health industry for over 4 years guiding thousands of people towards a healthier lifestyle. I love teaching and sharing my knowledge. One-on-one training, group classes and boot camps are part of my professional background. I am currently an Orangetheory Fitness Coach and ACE certified Personal Trainer.

Rylee Toltzman - Fitness Coach

Rylee’s love of sports started at a young age, beginning gymnastics and soccer at four years old and sprint triathlons at nine. After continuing to be involved in sports throughout high school, Rylee pursued a degree in Nutrition with a minor in Exercise and Wellness. She continued on to complete a Masters of Nutrition and certifications for Personal Training and Group Fitness. Rylee loves working with children of all ages and is excited to have some with HIIT, Full Body and Animal Movement classes!