Meet The Coaches

Diego Olivieri

Owner/Head Coach

After swimming in age group swimming, high school, and Junior College, I fell in love with triathlons. I competed in my first triathlon back in 2001 as a relay member and have never looked back. Since 2001 I have competed in Sprint, Olympic, 70.3 distance, and full 140.6 (Ironman) distances. My background in coaching started back in 1995 as a swim coach for kids under the age of 11. I progressed to coach all ages, including adults, and all levels, including National and Olympic swimmers. Even though I remained passionate about the sport I grew up with, I went into the business side of life and only did part time work in swimming. During this time, I also started helping friends with their triathlons, and just coaching them as a hobby. In 2013, I realized this passion for swimming and triathlons kept me coming back for more, and this is when I decided to form Triathlon Training Team. Having been a full time employee, training for triathlons, and starting a coaching company gave me a tremendous understanding for “what it takes” to put together a solid racing season. This is something I can relate to when helping an athlete, and I believe this clearly comes across when I coach them. Because of my in-depth background, I have the necessary tools to help out the beginner triathlete, and the ones that want to try and qualify for something more unique, like a National, or World Championship.

Amanda Hahn-Peters

Head Coach - Tri Gladiators

Amanda Hahn-Peters considers herself to be life-long triathlete. She started competing in the Iron Kids series at an early age and immediately fell in love with the sport. Amanda grew up racing the USA Triathlon Junior Elite Series during the summers, and, after a few years off from triathlon to concentrate on being a student-athlete in college, she decided to get back into the sport and work her way up to the professional level (where she’s been racing since 2007). Coach Amanda has been coaching runners and triathletes in some capacity since 2008. She hopes to inspire athletes of all ages to commit to a healthy lifestyle and believes that this can be achieved through multisport training. However, most importantly, Amanda wants to ensure that her athletes enjoy what they are doing and are growing just as much as athletes as they are as people. She is committed to combine her experience and passion to help your child achieve their goals, whatever they may be! Some of Amanda’s accolades include:

  • USAT Level I/Youth and Junior Coach
  • Professional triathlete (Olympic distance) 2007-present
  • Recruited member of the 2007 Elite Development Team
  • 3-time Junior National Champion
  • 4-time Junior Elite/U23/Elite World Championships Qualifier (2003,2004, 2009,2011)
  • Iron Kids National Champion (1996)
  • Scholarship Athlete – Florida State University (Cross Country and Track & Field)
Having been a full time employee, training for triathlons, and starting a coaching company gave me a tremendous understanding for “what it takes” to put together a solid racing season. This is something I can relate to when helping an athlete, and I believe this clearly comes across when I coach them. Because of my in-depth background, I have the necessary tools to help out the beginner triathlete, and the ones that want to try and qualify for something more unique, like a National, or World Championship.

Andres Ludena

Coach/ Trainer

Andres is a UCR graduate with a passion for motivating other to achieve their goals. As a two time Ironman finisher he knows what it takes to train both mentally, and physically, to successfully get to the finish line. He continues to look for the physical challenges. His background in swimming and his love for urban cycling make him a perfect fit to be one of our swim instructors, and our indoor biking class instructor.

Astra Underdown

Assistant Coach

Astra is a certified personal trainer through the American Council on Exercise. She is an assistant coach to Triathlon Training Team, CDA Tri Team based out of Coeur d’ Alene, Idaho, and she is also the director for the CDA Tri Team. As a stay at home mom to a 4 and 2 year old she enjoys living an active, healthy lifestyle to set an example to her children. She has completed four 70.3 races and a full Ironman with her husband, Brandon, racing alongside her. She has a full race schedule in 2018 and is excited to add two new races to her growing list, IM Santa Rosa and IM Arizona.

Alyssa Gersdorf

Assistant Coach

Alyssa Gersdorf is a USAT Level 1 Coach certified coach, Ironman Coach, and RRCA certified running coach. She is a five time Ironman finisher, six time half Ironman finisher and competed in the Ironman 70.3 Worlds in Chattanooga in 2017. She has also completed several half marathons, marathons, and sprint and Olympic triathlons, and consistently finishes in the top of her age group. She began coaching in 2016 and has coached several athletes through their first running events and triathlon and Ironman races. Alyssa resides in Northern Idaho with her two active kiddos and running partner Emma (aussie pup). When she's not coaching triathlon and running she also coaches freshmen girls basketball and other youth sports for her kids. One of her favorite phrases is if you can dream it, you can do it! This fits right in with the phrase Anything is Possible for the Ironman athlete mentality. "Ironman has changed my life and I never thought I could complete one, yet now I've done 5! Coaching others to achieve their athletic goals and watching them grow along the way is a very rewarding experience that I am thankful to be a part of!"

Daniela Karina

Assistant Coach - Tri Gladiators & Youth and Junior Elite Team

Born and raised in Southern California, Coach Daniela brings over 15 years of competitive swimming experience to the table. She is currently the assistant coach for our Youth and Junior Elite Team, Tri-Gladiators, and she is also the assistant coach for our adult team, Triathlon Training Team. She has been nationally ranked in several backstroke and freestyle events. Her swimming and academic talents took her to compete across the country for The Johns Hopkins University while she completed her undergraduate studies. She was a part of the team that led the Blue Jays to 3 Blue Grass Mountain Conference titles and is a 4 time NCAA Qualifier. Daniela began her swimming journey at the early of 5 and has not looked back since that time. Since her time as a collegiate athlete Daniela’s interests have turned to triathlons. She brings personalized and detailed instruction technique to all of her athletes and is a go to for anyone trying to master swim technique and conquer the open water swims.

Seth Rose

Assistant Coach

Coach Seth Rose is a certified USAT certified coach, and has been racing triathlon competitively for over 7 years in Olympic and Half-Ironman distances, and recently raced for Cal State Fullerton’s Cycling Club. His notable accomplishments include qualifying for Olympic Distance Amateur Nationals, Overall AG podium for LA Tri Championship Series, and a sub-5 hour 70.3. Coach Seth also found Transition Performance and specializes in Mental Performance and Sport Psychology services. He has consulting experience with diverse athletes and performers such as, baseball, softball, golf, pole vaulting, rugby, soccer, basketball, martial arts, endurance athletes (swimming, cycling, running, triathlon), and many more at both the club and intercollegiate levels. He has been sought out by athletes and coaches to teach cognitive restructuring skills and techniques following sport psychology principles to increase confidence, mental preparation, and to perform under pressure. Seth currently teaches as a Lecturer in Kinesiology at CSU Fullerton, while consulting with teams and athletes.

Cory Schiltz

Head Coach

Coach Cory Schiltz is the Head Coach for Tri Gladiator’s youth and junior Elite development program. He earned his degree from San Diego State University, graduating Summa Cum Laude with a degree in kinesiology with an emphasis on physical therapy and athletic training. He was fortunate enough to compete for the university’s triathlon team, competing at collegiate nationals twice. In the west coast collegiate triathlon series he podiumed twice for their omnium scoring criterium and placed top 50 at the nation level. Ive raced distances from the MTR and sprint to Olympic and long course (70.3 Ironman). My favorite races I’ve competed in are wildflower’s Olympic distance and long course distance, cal poly’s MTS, and Santa Barbara’s long course (although there are many races close to my heart #oceanside70.3 #UCSBkendra’srace). I’m currently taking classes to become a firefighter, a dream I’ve had for years now. I’ve been trained by Olympic level coaches at the Olympic training center in Chula Vista, trained with some of the top triathletes in the world, and have been fortunate enough to learn technique and methodologies from doctors that are truly passionate about sport and science. I’ve coached Edison High School’s cross country team for 4 seasons of cross country and two seasons of track, and have worked with many collegiate level triathletes to help them accomplish their goals in everything from triathlon to strength training. This sport has evolved from exercise to a lifestyle for me and is something that that I am so excited to share with the future generations of triathletes. I’m always happy to talk and share stories and advice! Please reach out and contact me for anything from how to transition out of T2 in under 15 seconds to how to rampage on the bike and walk your run. I’ve been there and made all the mechanical and physical mistakes you can imagine, if you need a good laugh just ask.

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