Coaching Staff
Nathan Mundt Head Coach

With over 15 years of experience, Nathan has coached both collegiately and within USA Swimming.  In 2003, an unexpected turn of events led to Nathan becoming one the youngest Division I Head Coaches in the country at Valparaiso University.  From 2005-2008, he served as the Head Coach of the Men’s & Women’s programs at Western Illinois University, and was named the Mid Continent Women’s Coach of the Year in 2007.  In 2008, Nathan became an assistant coach at the University of Iowa and was a part of the coaching staff until the fall of 2016.  In eight season with the Hawkeyes, Nathan helped guide numerous athletes to All American honors, and was the lead coach of the 2015 Women’s Big Ten Champion in the 1650 Freestyle. 

Since becoming the Head Coach of the Iowa Flyers since 2016, Nathan has led several qualifiers to USA Swimming Junior Nationals.  In 2017, Nathan coached the 2017 US Open Champion in the Women's 200 Butterfly. In the same year, he was named to USA Swimming's list of Junior Natioanal Team Coaches.

Nathan’s wife, Erika, is a PE teacher at Iowa City West High. The couple has three boys Nolan, Macklin and Lincoln. 

Christopher Freeman Assistant Head Coach

Chris was born and raised in Rochester, Minnesota, where he competed for the Orcas swim club. He was a letter winner as a swimmer in high school, where he was a four-time NISCA All-American and state champion in the 500 freestyle in his senior year. Chris then came to swim for the Hawkeyes, competing in three Big Ten championships and attending the Division 1 NCAA championships as an alternate. During his time as a Hawkeye, he achieved three top-ten Iowa all-time top performances in the 200 freestyle, 100 butterfly, and 100 backstroke. Chris graduated from the University of Iowa in the spring of 2015 with a degree in recreation and sports business. Later Joining IFLY Swim Club in the summer of 2015, working closely with the elite groups before accepting the IFLY Assistant Head Coach postition in September 2016.

Tanja Avant Assistant Coach/Head Age Group Coach

ASCA Level 3 Certification


Tanja has enjoyed swimming nearly all her life, literally spending most of her summers during her youth in a pool. Quite by accident, she discovered her love for competitive swimming in high school and swam for her school's team, the Washington Warriors in Cedar Rapids, IA. Tanja had a very successful swimming career excelling in most sprint events. During her high school and college days Tanja was a lifeguard and had the opportunity to teach her love of swimming at the YMCA and Elmcrest Country Club in Cedar Rapids. She graduated from the the University of Iowa in 1995.  Tanja worked at the University of Iowa Hosptials and Clinics for 15 years before starting with IFLY in 2011 as the Freshman Group lead coach.  In 2015, she enthusiastically accepting a full-time position with IFLY as the Head Age Group Coach.  


Tanja remains involved in swimming at holding various positons within Iowa Swimming, INC including:  

  • Board of Directors:  Age Group Vice Chair (2017 to present)
  • 2018 ISI Swimposium Committee Chair (10/2018)
  • Nominating Commitee Chair (2016-2017)

Additonally, Tanja has enjoyed coaching at several Zones and All-Stars Meets for Team Iowa:

  • Central Zones:  2016, 2018
  • Multi-Cultural Zones:  2017
  • Midwest All-Stars:  2014, 2017

Tanja lives in Iowa City her husband, Todd, and their family...both two-legged and four-legged!

Matthew Boyd Coach

I grew up in Clinton, Iowa and was influenced by my godfather to start swimming around the age of eight. I competitively swam for River Cities Aquatics and Clinton High School. After high school I attended the University of Iowa and swam for the Men's Swimming and Diving team until the spring of 2016 when I graduated from the Iowa with my B.A. degree in Chemistry. I am currently attending the University of Iowa College of Pharmacy. 

Mike Brotherton Coach

Mike began competitive swimming at age 6. He participated year round in YMCA and AAU age group programs and later swam for Dubuque Hempstead High School where he was a four year letter winner and team captain.  Mike comes from a family of swimmers and his daughter Natalie and son Kirk have continued the tradition.  Mike is also a certified official and swim instructor.  Mike  graduated from the University of Iowa and has been an Iowa City Police Officer for the past 37 years and currently heads up the Investigation Division. Mike's hobbies include flying, fishing and scuba diving. 

Christopher Dawson Coach
Rachel Duray Coach

Rachel is from DeWitt, Iowa and began swimming competitively when she was 12. She swam breaststroke and coached with River Cities Aquatics, and went on to swim at Clinton High School. She is currently attending the University of Iowa to become a Spanish and English as a Second Language teacher and getting her endorsement to coach high school swimming. 

Blanca Castillo-Lehnertz Coach

Blanca has been in the swimming world since she was 10. During high school she competed for the Walnut Creek , California National swim team and competed at Junior Nationals in multiple years. Swimming collegiately for the University of Kansas , her specialty events were the 100 and 200 Butterfly. While in college she also swam for the Puerto Rican National swim team and placed 3rd in the 1988 Central American Games in Mexico. That year, she swam a 200 butterfly that set a U.S. Masters national record time that stood for 18 years.

Following graduation from KU, Blanca attended UCLA where she earned her Master's Degree and joined an ocean swim team and competed in Pacific Ocean open water races. After teaching junior high school and high school in southern California she relocated to Iowa to raise a family.

After taking six years off from swimming, she jumped back into the pool again in 1997. Blanca found the joy of competing at the national level in Masters swimming. In the 2002 Masters National Meet she finished in the top four in four events and won the national championship in the 200 butterfly. In the 2006 FINA World Master's Championships Blanca finished with two top ten performances.

Blanca has been a USA Swimming certified coach for the past ten years, working with age group swimmers with a wide range of ability levels in eastern Iowa. Blanca and her husband Rod have three children (Anthony, Tereysa and Mariana).

Sabrinna Hegelheimer Coach
Sabrinna grew up in Ames, Iowa and started swimming competitively when she was about 11 years old for
the Ames Cyclone Aquatic Club.  In high school she primarily swam breaststroke and sprint freestyle. 
During her high school swimming career, her team had some very high achieving individuals and they worked hard to win 3
state titles.  Sabrinna is currently a sophomore at the University of Iowa studying Health and Human
Physiology and plans on attending Physical Therapy school after graduation. 
Crew Keller Coach

I was raised in Lincoln, Nebraska and I've has been swimming since I was 5 years old. I swam with numerous club teams back home and at Lincoln Northeast High School. During High School I was a top-ten all-time finisher in multiple events, a four year letter winner, a three year state qualifier and a four-time academic all-conference award recipient. I also played football, baseball, and ran track at Northeast.


I received a handful of offers to swim competitively at the next level however my heart told me to stay at home. I attended Nebraska Wesleyan University (also in Lincoln) and competed in both football and swimming; I was a team captain my senior seasons in both sports and an academic all-conference selection all four years in both football and swimming. In swimming my focus was in the 100 and 200 yard breaststroke and mid-distance freestyle events, where I've competed in both consolation and A-finals at our championship meet.


I graduated from Nebraska Wesleyan University in May of 2018 with majors in Business Administration & Sport Management, with minors in Coaching and Human Resource Management. I am now currently pursuing my Masters degree in Sport and Recreation Management at the University of Iowa and plan on graduating in May of 2020. 

Michelle Koller Coach

Michelle has loved being in the pool since the age of 10 when she joined the Burlington Swim Team. Her favorite strokes still are freestyle and butterfly. Michelle continued getting stronger and more experienced as a high school competitor and state qualifier atýBurlington High School. She proceeded to swim in college at the University of Northern Iowa. Michelle has been active in the Iowa Cit swimming community for over eight ears; coaching club, junior high, and served as the assistant varsity girls coach at Iowa City High for five years. Michelle currently also serves as a junior high and high school swimming official. Michelle's day job is Operations Director for the ENT & Surgical Specialities practices of the Physicians' Clinic of Iowa in Cedar Rapids. She lives south of Riverside with her husband Ryan and son Tristan.

Amy Lenderink Coach

Amy was born and raised in Parker, Colorado and has been an elite swimmer since the age of 10. Her passion for swimming began on her summer league team, the Stonegate Stingrays, where she holds team and league records for every age group in the butterfly and freestyle events. Amy was a member of the Denver Swim Academy club team in Colorado for 6 years, and also swam for Regis Jesuit High School in Aurora. Amy was a 7-time All-American, 5-time State Champion and State runner-up in the 100 butterfly in high school, and has brought her talents in the pool to the University of Iowa collegiate swim team. Since moving to Iowa, she has swamtwo top-ten Iowa all-time swims in the 100 and 200 butterfly events and has made the University's dean's list for 4 semesters. Amy is currently a sophomore student-athlete at the University, studying Psychology and Human Relations with an aspiration to become a Sports Psychologist. She is thrilled to be a new member of the Iowa Flyer's coaching staff and hopes to foster young athlete's growth and successes both in and out of the pool!  

Joseph Myhre Coach

I am from Saint Charles Illinois, but I started swimming in Brownsburg Indiana when I was 10 years old. In high school I was a multi time All American, and Illinois state champion in the 100 freestyle. I currently swim for the University of Iowa and I am studying exercise science. At Iowa, I’m part of the 200, 400, and 800 freestyle relay school record teams, and I am an NCAA Honorable Mention All American in the 200 freestyle relay. The majority of the past 10 years have been in the pool for me, and I have grown very passionate about the sport. I love to race fast and to go amazing times, but nothing beats the people I meet and get to swim with, and the amazing experiences I’ve had with the sport. I think swimming is filled with very important life lessons and teaches you many things which is why I love it. I am extremely exited to work with the Iowa Flyer swimmers and help them reach their ultimate goals in the pool. 

Sage Ohlensehlen Coach
Victoria Rose Coach

Tory began swimming competitively in 5th grade, continuing to swim at North Central Junior High and West High. She also began swimming for IFLY during in her freshman year at West, and started teaching swim lessons in her junior year. Tory is now a freshman at the University of Iowa, studying radiation therapy.

Alissa Sabers Coach

Alissa has always loved the water and started swimming competitively at the age of seven. Growing up in Decorah, Iowa, she participated first with the local summer team. In high school, Alissa competed for three years with the USS program and also swam for Decorah High School. She also worked as a lifeguard and taught American Red Cross swimming lessons for five years. Alissa graduated from the University of Iowa in 2010 with a degree in Health & Sport Studies and in 2014 with a Masters of Arts in teaching English.  She is currently an English teacher at Xavier High School and resides in Iowa City with her husband, Michael and daugther, Emma.

Adrianna Schroeder Coach
Mitchell Schumacher Strength Coach
Janice Severns Coach

They say "Do what made you happy when you were 10 . . ." That brought Jan to IFLY as a masters swimmer and now as a coach! Jan grew up in Omaha and started club swimming and diving at age 8. After a move to Deerfield, Illinois, she swam and dove in high school (6th in state in diving, state qualifier in 100 butterfly) and was a diver in college at University of Miami in Florida, where she was an NCAA qualifier in the 3M springboard. Her aquatic life has included teaching lessons, coaching a club team, as well as synchronized swimming, scuba diving, and underwater hockey! Jan now lives in Williamsburg, Iowa, with a little hobby farm (2 horses, 4 dogs, and 10 cats). Her daughter was a collegiate soccer player and her son a high school divisional wrestling participant.

Brooke Timmerman Coach

Brooke started swimming competively at the age of 7 with a summer rec league. At 8 she moved to a YMCA year round team called the Stoney Point Stingrays. She swam for this team for four years. During her time with the Stingrays she captured multiple team records at different age levels, and was on a YMCA state record breaking relay team. At 12 she began her transition to IFLY, where she swam for 5 years.  While part of IFLY, Brooke was a member of multiple state gold medal winning relays and placed first in the 100 breaststroke at short course state meet. While competing with IFLY, Brooke also swam for her high school team, Cedar Rapids Kennedy. A labral tear in the shoulder ended her swimming career in her senior year of high school. Brooke specialized in all breaststroke events and the 200 IM. She is currently a sophomore at the University of Iowa, studying International Relations, Spanish, and Arabic. 

Sarah Rhoads Strength Coach
John Colin Coach
Board of Directors
Phil Julson Associate Director-Aquatics