Coaches and Directors

Coaches and Directors
Coaching Staff
Mark Van Voorst Head Coach & Coach-High School & Senior

Coach Mark started swimming competitively for the Fallbrook Area Swim Team (FAST) when he was in 6th grade and continued swimming competitivley though middle school, high school, and college. During this time he was also very invloved in Water Polo. He was apart of the team that won the San Diego CIF Championships in 1978 and the runner up in 1979. While in high school, Coach Mark qualified and competed in the CIF San Diego Swim and Dive Championships all four years. He still remembers his 100 backstroke time of 56.1 seconds. Coach Mark continued his aquatic career by playing water polo at the Junior College level at Palomar College and then moving onto Cal Poly San Luis Obispo. While at Cal Poly, he was part of the Wheelman (a competitive cycling team) and competing in road races and criterions regionally. 

After graduating from Cal Poly, Coach Mark coached a multitude of sports and activities in the schools he has taught in or been invloved in adminstration for. These include boys basketball, baseball, softball, robotics, chess, and track. 

Coach Mark moved to Yuma in 2012 and started coaching for Kofa High School. In his first few years there, he had 21 swimmers on the team. In the six years leading the program, there are now over 50 swimmers on the team. He is very proud of this as he sees how the introduction of swimming in many of these new swimmers expands their involvment in school, improves grades, attendance, and the enjoyment of the high school experience. 

When Coach Mark became the Head Coach for the Yuma Heat in 2015, the club was in the midst of some challenging times. The team was stuggling to have swimmers meet Junior Olympic time standards. In conjunction with an amaing set of board members, strong and continued support of parents, coaches who really care about the athlete, the Yuma Heat had its most successful year in team history. The 2018 short course season saw the team send the most swimmers in team history to the Arizona Junior Olympics, the second most swimmers in team history to the Arizona Age Group State Championship, 7 athletes to the Far Western Championships in Santa Clara, CA., and the team even sent one swimmer to Speedo Sectionals. Coach Mark won the Arizona Swimming Age Group Coach of the year in 2018. 

The future is looking bright and he continues to look for even bigger accomplishments as the Heat program expands. 

Theresa Mccallen Assistant Coach- Junior


Coach Theresa grew up swimming competitively with Hillside Aquatics Club in Southern California from 5-18 years of age. It was then and there where her love for the sport of swimming, teaching and coaching developed. She also swam on her high school varsity swim team all four years. She was a CIF qualifier in the 200 and 500 Freestyle her freshman- senior year.


Theresa became a water safety instructor, lifeguard, and club swim coach all while she was in high school and has done it ever since. She attended Franciscan University Of Steubenville, where she earned a BS in Mental Health and Human Services. In college she meet her husband, Peter. Peter is a Special Forces Green Beret, and is working at YPG as a HALO Instructor. They have 5 children, four of whom swim for the Heat.


Theresa was a head swimming coach for Phoenixville Area YMCA for 6 years from 2004-2010. She coached 200 athletes from the novice to national level. She recently came from Coast Aquatics, out of Destin Florida, where she was a assistant coach for the novice and age group levels, from 2012-2017. She is thrilled to be given the opportunity to coach with Yuma Heat. She believes that together we can develop strong, competitive, educated, happy, confident, and well rounded swimmers!

Ryan Carroll Assistant Coach- Developmental 3

Coach Ryan was born and raised in Yuma. He was also an accomplished swimmer with the Yuma Heat for 9 years. While swimming competetively with the Yuma Heat, he made State Cuts and he achieved final awards in the 400 IM and the 200 and 100 backstroke. Coach Ryan's times were 4:50.71-400IM, 2:18.86- 200 Back, 56.01- 100 Back.

In addition to coaching with the Yuma Heat, Coach Ryan also works as a pool manager for the City of Yuma Parks and Rec. and is pursuing a long-term career in coaching. Coach Ryan is also currently a college student, pursuing a degree to become an X-Ray Technician. When asked about his last three years as a Yuma Heat coach, he said "It has been absolutley awesome!" 

Shantele Sajdowitz Assistant Coach- Developmental 1 & 2

Coach Shantele Sajdowitz has lived in Yuma for 8 years. Her husband and her moved here after getting married in July 2010. They have 3 dogs and 1 son (Colton James) who was born in June of 2015. Her son takes up a majority of her time and she loves spending time with him. As a family, they enjoy being outside and riding on their jet ski in their spare time.

Coach Shantele is currently a special education teacher at Yuma High School and was the Head Swim Coach at Yuma High School for 2 years. She was a competitive swimmer from the age of 8 all the way through her senior year of college. She swam for Black Dog Swim Club in Burnsville Minnesota and then went on to swim for Carroll College in Waukesha, Wisconsin. Through her college years when she wasn't busy swimming, she was also a swim instructor for a private swim school. Coach Shantele has always had a passion for the sport of swimming since she became a competitive swimmer and enjoys watching the kids progress through the program.

Coach Shantele has been a part of the Yuma Heat for the past 3 years now in various roles such as age-group assistant coach and now the pre-comp head coach. She has enjoyed her time with the Yuma Heat and hopes to continue to impact the lives of children as they move through the Yuma Heat program. 

Board of Directors
Brock Amon President
Ned Hoogland Secretary
Mark Van Voorst Coach Member