Coaches & Directors



Coaching Staff


We are here to support your needs. If your questions are related to workouts, meets, events, goal setting, and other swimming related needs, please contact one of the coaches. For all questions related to administrative, such as dues, safety, or policy issues, please contact one of the board members.

Welcome to O2 Performance

Gilberto Junior

Head Coach - ASCA L4


Nina Lim

Head Age Group Coach - ASCA L2


Coach Nina joins O2 Performance Aquatics in March 2016, coaching GOLD and SILVER. Before joining O2, she was an age group coach for Lakeside Aquatic Club in 2015 and is currently an assistant coach for Carrollton Aqua Racers since 2009. She swam with Carrollton Aqua Racers for eight years where her desire to coach stems from. She swam for Newman Smith High School and was a regional and TISCA qualifier all four years. She is currently a student at the University of North Texas, studying for her bachelors in Kinesiology with a minor in biology.

Swimming is a large part of her life and while she no longer competes, she can’t imagine herself anywhere else but on the pool deck. Her goal as a coach is to help motivate and guide athletes towards achieving their own form of success and goals; whether it be successfully learning a flip turn, being legal in a stroke, or achieving best times. She strongly believes in athletes choosing to be successful and taking ownership and responsibilities for their betterment with a guiding hand.

Viet Anh Nguyen

Assistant Coach - ASCA L2


Vi Nguyen

Coach VI joins O2 Performance Aquatics in January 2015, coaching Pre-Competitive, Bronze, Silver, Gold and Masters. Before joining O2, he help create the Coppell Crocs swim team in 2008 and became Head Coach and is currently still the Head Coach since 2009. While with Coppell Crocs, he has taken 27 National Qualifiers and 50 State Qualifiers in at Recreational Level. He previously swam for Nimitz High School and holds 7 of the 11 school records.  


(USAS) - USA Swimming Coach
(TPPC) – Texas Public Pool Council
(NTAA) – North Texas Aquatics Association
(USMS) – US Masters Swimming Coach
(ASCA) – American Swimming Coaches Association – Level 2 Achievement  (Pending Level 4 Education)
(LGi) – American Red Cross Lifeguard Instructor
(AFO) – Aquatics Facility Operator 



75% participation from team at Swim Meets
15% of Team qualifying for Texas Age Group Swimming(TAGS)
10% of Team National level competition


Recognized Coach by NT-LSC 
Become most effective coach and be concerned for Performance Consultant 

Coach swimmers to National level in USA-S

Charis Lynn Parker

Assistant Coach


Charis will begin coaching with O2 Aquatics in January of 2017.  Charis has been swimming competitively for over a decade. She has competed at club, scholastic, and collegiate levels.  Charis' swimming resume includes qualifying for the NYS Championships and USA sectionals, a Section III Title, and multiple school records for high school and college. Her specialty is in Breaststroke and the Individual Medley.
Swimming has been and integral part of Charis’ life. She hopes to share her passion for the sport and love of training with those that she coaches. Swimming is an opportunity for people to build fitness, discipline and friendship both in and out of the water. 

her achievments 

Scholastic & Collegiate Swimming 

At Malone University Women’s Varsity Swim and Dive Team Canton, OH  2013-15 she held School Record Holder in the 100 Breast, 200 Breast, 800 Free Relay, 200 Medley Relay 

At Baldwinsville Women’s Varsity Swimming, in Baldwinsville, NY 2009-2012, she was the Team Captain, State Qualifier, Section III title in the 100 Breast, School Record holder 

She has a impressive carrer as a swimmer   

She is one of our top masters swimmer at O2 Aquatics Masters Swim Team, She was member of Lancaster Aquatic Club, Liverpool Jets Swim Club, Baldwinsville Sharks Swim Club, she also was swim Instructor and Lifeguarding at Liverpool Jets Learn to Swim Program 

Coach Parker graduates from Malone University  Canton, OH in August 2016 with Bachelor of Communication Arts: Media/Film/Theater 

Kara Jackson

Assistant Coach


Kara Jackson started swimming in high school and absolutely fell in love with it. She swam varsity every year for R.L. Turner and served as captain her senior year. That same year she placed a record on the board with her team for the 400 free relay. She swam his freshman year of college at Texas A&M Galveston as part of the Sea Aggie Swimmers Club. She came back to Dallas for a different area of study, She is currently working towards a bachelors in Sports Management. 
Kara's Philosophy
As a coach Kara wants to show the swimmers what in means to have goals and show them how they can achieve them. She expects the swimmer to put in maximum effort because in the end you only get what you put out. Kara believes, and wants the swimmers to know, there is so much more to swimming than the competitive aspect and that while swimming can be seem like an individual sport, it is very much a team sport. She would love for the swimmer to build personal friendships with each other and to build each other and end the end she hopes that she has helped these young swimmer to become strong, confident individuals.

Jon Drori

Assistant Coach


Coaching Bio - 

Background:  Jon started swimming at the age of 7 when he moved to the United States from Israel. His first swim instructor was a then-unknown Cullen Jones at the Connection for Women and Families in Summit, NJ. He went on to train with the Junior and eventually Senior team at the Berkeley Aquatic Club in Berkeley Heights, NJ under the instruction of the late Jim Wood, who at the time was President of USA Swimming. After graduating high school, Jon went on to swim in Division 1 of the NCAA for the New Jersey Institute of Technology under Coach Michael Lawson. Despite having to red-shirt his sophomore year due to a shoulder surgery, Jon was voted by the team as Captain in his Junior and Senior years of College. After having graduated with a bachelor’s degree in Biology, Jon went on to work for Life Time Inc. at the Flower Mound and Plano TX locations as the Aquatics Manager. Jon is joining O2 Performance Aquatics in March of 2019 to pursue his passion of helping children develop into responsible and hard-working adults through swimming.


Coaching:  Jon has been teaching swim lessons independently and in organizations since 2008. He has taught all ages and skill levels from infants to seniors and beginners to masters, and has been registered with USA Swimming as a certified coach since 2016. He started by coaching his local municipal summer swim team and eventually becoming the head site coach of the Life Time - Flower Mound location. During his time there, the team saw huge growth in numbers and quality of swimmers. Even as an aquatics manager, Jon continued to teach and coach when he could because of how passionate he is about coaching. For a time, Jon was appointed as Interim Regional Head Coach of the Life Time Swim Dallas team, helping other coaches and programs raise their game and improve their site teams.


Philosophy:  Practice make permanent; perfect practice makes perfect. Swimming is a tough and honest sport where you get out exactly what you put in. Especially in the age groups where kids drop time at almost every meet, it is important to emphasize that their bodies’ natural development is a major factor in their improvement, and it needs to be supplemented with excellent work ethic in practice. To work hard in practice and see those results translate into dropped times and personal/team accolades is what teaches kids the value of hard work. This is a life-long skill that they will keep far beyond their swimming years. Apart from safety, Jon believes that a coach’s primary responsibility is to use swimming as a means of teaching work ethic, responsibility. Swimming fast is a product of strong character and hard work. 


Alexjandro R Palacios

Assistant Coach


Alejandro (Alex) Palacios -
Alex’s passion for swimming began at the age of 5 when he first started competitive swimming. He began coaching at the age of 15 and has been a USA swimming coach for the last 14 years. Alex is very proud to have helped multiple swimmers achieve regional, state and national levels throughout the years.  He met his wife while swimming at the same swim club (she was faster than him). They then started a large and very successful swim team together in their home town of El Paso, Texas which they coached for five years before making DFW home.  He has 3 adorable kids (Sophia, Lucas and Samuel) and after serving as the head coach and assistant manager of Life Time Colleyville, he is grateful and honored to serve as the newest addition to O2 Performance Aquatics family.
Favorite Event: 100 Butterfly

Favorite Swimmer: Aaron Peirsol

Mason Contreras

Assistant Coach


Juliano Ciruelos

Masters Coach


Coach Juliano is The Masters and Pre Comp Coach

He believes Perseverance is the quality that allows someone to continue trying to do something, even though it is difficult. This is valid for all aspects of our lives. In triathlon this is what makes someone excel and have a long life in the sport.

He sees in triathlon a lifestyle. It makes us pursue a healthy and balanced life, but also challenges us to the best of our abilities. The steps for success in sports, according to running coach Dr. Jack Daniels, are inherent ability, motivation, opportunity and direction. The last>

His coaching philosophy is based>

His role as a coach is to help you, inspire you and guide you through the process of training. "My job is to establish a healthy coach-athlete relationship and together, determine the best course of action with your best interests in mind".

As a coach He likes to be present in the training sessions as much as possible. By doing so, He can analyze his athlete’s progression, see where they need improvements, observe overall state, and then, if required, adjust the planned session to their needs.

Juliano was born in Brazil and in 1997 I graduated in Aeronautical Sciences, which helped me achieve his youth dream to become an airline pilot. In 2000, due to his job, He started training triathlon as a way to be fit for flight and to make new friends. At Amaral Triathlon in Curitiba, Brazil, His coaches, His wife and friends inspired him to achieve more than he could expect. In 2003 he qualified for Ironman Triathlon World Championship and in 2006 he finished Ironman Brazil with a PR of The love for the sport took him in 2007 to pursue His BS in Physical Education. At the college, for 3 years, Juliano participated in several projects as assistant coach, working with beginners and all level swimmers, runners and triathletes. 

In 16 years of endurance sports He participated in races, from sprint to Ironman, 5K to marathon, and also in relays of different formats. 

Here in DFW area He has been coaching for Triple Threat Tough Tri Club in Plano, TX. 

Hes Best Quote: "In the dust of defeat as well as the laurels of victory there is a glory to be found if one has done his best." — Eric Liddell


Coach Juliano has a Impressive Background



       USAT – Level 1 Coach certification           

       Ironman Certified Coach


       CPR/AED AHA

       IRONGUIDES Coach certification

       CBTri - Coach certification



He played several sports during my youth like soccer, judo, jiu-jitsu and tennis. In 2000, He started in triathlon and since then Juliano completed approximately 40 races in triathlon (sprint to Ironman) and running (5k to Marathon). His athletic highlights are the Ironman World Championship in 2003 and a PR of 9:27 in Ironman Brazil 2006.

       Ironman Brazil 2006 - 9:27

       Ironman World Championship 2003 - 10:22

       Pirassununga Long Distance Triathlon 2002 - 4:20

       Santos Internacional Triathlon 2007 - 1:58

       Caioba SESC Triathlon 2007 - 1:03

       Curitiba International Ecological Marathon 2007 - 3:07

       Rio de Janeiro Half-Marathon 2014 - 1:28

       Stonebridge Ranch Sprint Triathlon 2015 – 54:54

Karen Robertson

Master Coach


Karen started her athletic career when she was around 13-14 years old. She started gymnastics at the local YMCA and moved into the competitive program until she reached High School. She competed at the High School level and received a scholarship to Lamar University where she competed all around there for a year.

Karen was always active by going to the gym and even kept up her tumbling into her Thirties. She eventually started coaching gymnastics from toddlers to competitive A & B team girls.  she then became certified to judge gymnastics meets from 9-10 year old all the way up to the High School meets. That was in 1987-1993. In the mean time she also started running in 1988 and did her first triathlon in 1991 in Midland Texas which consist of a 1k swim in the 50 meter outdoor pool and the bike was 18 miles and run was a 10K.  Karen did a few more triathlons after that locally from West Texas to Southeastern New Mexico. When moving to DFW, she found a Masters Program and that is where she really began to learn to swim. she started with North Lake Masters program about in 2005 and have been a member ever since. she have done numerous triathlons in the 29 years and off-road triathlons starting about 2002 until present. Karen even competed in a few mountain bike races and ultra distance races which last anywhere from 4-6 hours. Karen has earned:

All American Rankings in USAT

National Xterra Lake Tahoe 2002 - 1st Age Group (qualified for world championship in Maui)

6th Age group 2002 Maui

Xterra World Championship 2003 - 2nd place Age Group

Many awards from 1-3 Overall, Age Group, Regional and State Ranked in top 3, Masters, and now Grand masters winner

Since all of her experience with training and racing, Karen has learned a lot about herself even when aging she has learned her limitations of knowing one cannot continue to do what one did 15 or 20 years ago. She is glad she can still have triathlon part of her healthy lifestyle and able to balance family and work along with still competing after all these years and being on the podium still.

Karen is a Mother of 2 girls and 4 grandchildren from ages 4-9 and works as a Massage Therapist for 19 years self employed.

She has come to really like swimming and have enjoyed learning the challenge of learning the other strokes besides freestyle. It is just another challenge that has made me a better swimmer she believes. She wanted to give back to the sport so she could help out those just beginning triathlon or those that just want to swim for fitness and those that want to be challenged for a good workout.

Karen Certifications 

USA Triathlon Member for 30 years

Level 1 and 2 US Masters Coaching Certificate

Margaret Watson

Yoga Instructor


Margie is a native of Virginia but has been living in Colleyville, Texas since 1997.  After teaching high school for 33 years, Margie decided to continue her devotion to teaching by becoming a registered Yoga Teacher (500 RYT) with Yoga Alliance. Margie is currently teaching yoga at Sacred Soul Yoga Studio in Hurst, Texas and teaches yoga to the O2 Aquatics Performance Swim team as part of their dry land training.  Margie’s passion is to share yoga with as many people as possible in a non-judgmental, non-competitive setting.  Her philosophy is that if you can breathe, you can do yoga!

In addition to her love for yoga, Margie’s other passions include working with her registered therapy dog, Bailey, for the Paws Across Texas (PAT) organization, playing tennis, and spending time with family and friends.  


  • 200-hour teacher training at Lifetime Fitness Academy, December 2014 
  • 300-hour teacher training at Yoga Forte Teacher-Training School, December 2016   


Ingit Chandrawat

Yoga Instructor


Motivated Yoga Instructor with advanced training in yoga. Enjoy inspiring others to improve wellness and commit to long term health and fitness goals.

Completed a comprehensive 200 Hours of Yoga Instructor Training Program from Dhyana Yoga Center, February 5, 2017. Taught a class of 15 kids in Radhaswami Temple in Valley Ranch

At present, working in The Highlands School, Dallas as Assistant Teacher in pre-kindergarten.  In past, worked as substitute teacher in a number of schools that include The Highlands, Dallas; North Hill Preparatory, Las Colinas; and other Uplift Education affiliated schools in DFW area. Taught classes from kindergarten to fifth grade.

Have a bachelor degree in civil engineering from SIT, Tumkur, Karnataka in India  

O2 Board of Directors

Michael Agar



Don Blackard

Vice President


Katrina Ann Hernandez



O2 Treasurer



Jason Pick



Hector Reyes

Director at Large - Youth


Theresia DiPalma

Director at Large - Masters


O2 Registrar

Team Registrar