Coaches and Directors

Coaches and Directors
Coaching Staff
Jeff Armstrong Head Coach

Coach Armstrong has been involved in AAU and USA swimming for the past 40 years, both as an competitor and a coach.  He was an age group state champion swimmer in Indiana and Kentucky.  Jeff came to COOG's from Jeffco Hurricanes after 15 years as the Head Coach in Colorado.  Jeff was at Phoenix Swim Club as a Senior Assistant Coach, Prior to Phoenix, he was the Head Age Group Coach of Williamsburg Aquatic Club (WAC) in Virginia.  Prior to WAC, he was the Head Age Group Coach at Tiger Aquatics in Stockton, California and an Assistant Coach with Pacific University aquatic program (UOP). 


Jeff has produced several state champions, national top 16, sectional swimmers, Jr’s & Sr’s qualifiers and Olympic Trials throughout his career.  He was selected as a California Zone coach in the summer of 2000 and as a Virginia Zone coach in the summer of 2005.  He was awarded Colorado Coach of the Year in 2010.  In 2005 he was runner-up in Virginia’s Age Group Coach of the year voting.  Coach Armstrong received a Bachelor of Science degree in Police Administration and a minor in Physical Education from Eastern Kentucky University

Jayson Williams Head Age Group Coach

Jayson Williams has coached since 2003 at all levels of competitive swimming; USA Swimming, High School, and summer league. He continues to promoted  the philosophy of helping young athletes improve and reach many personal goals.


Coach Jayson grew up in Houston Texas and swam for South Central YMCA, Harris County Aquatic Program, and Jack Yates High School and received multiple scholarship offers to further his swimming career. Coach Jayson decided to pursue baseball after high school playing at Southern University but never lost his love and passion for swimming. Jayson is happy to be coaching for the COOGS as coaching has many rewarding aspects for him such as being able to make a difference and seeing the results immediately as well as long term. Jayson enjoys coaching to help teach the valuable life-long lessons that can be found from swimming.

Bob Tweedy Age Group Coach - South

Education:  University of Arizona – degrees in Journalism and Athletic Coaching
Four year letterman of the Swimming & Diving team at Arizona. Began his coaching career in 1979 and has coached swimmers at various levels:  summer league, high school, and US club programs. Currently works with the age-groupers at the COOGS south location where the emphasis is building correct stroke technique that provides a solid foundation for future success and love of the sport. In his day job he is an astronaut trainer, teaching International Space Station crews how to exercise in microgravity.
The best part about being on the Coog Coaching staff are fellow coaches he’s privileged to work with and, of course, the athletes who train in the program.

Melanie Rosen Development Coach
Board of Directors