Coaching Staff
Kevin Thornton Head Coach

Kevin began his coaching career in 1980-1981 with the Little Rhody Aquatic Club in Rhode Island. Since that time he has coached at clubs in Michigan, Florida, and North Carolina. Through the years, Kevin has coached swimmers of all ability levels: Learn-to-Swim, B/C swimmers, National Top 16, National Age Group record breakers, National Champions, NCAA Champions, Olympic Trial Qualifiers, World Record Holders, and Olympic Medalists including Dara Torres, Janet Evans, Summer Sanders, Anthony Nesty, Claire LeMore Walker and Allison Wagner. He has also coached at many International competitions for the USA, Venezuela, and Suriname.

Kevin was on the US Swimming National Coaching staff from 1992-1997. His club team in Florida, Swim Florida, won the Women’s National Championship in 1996 with the Men’s team placing fifth and the combined team placing third. He has been an American Swimming Coaches Association (ASCA) Certified Level 5 Senior Coach (designated by having swimmer(s) place in the top 3 at a National/International Competition) for 23 years and also a Level 5 Age Group Certified Coach (designate by have more than 50 swimmers hold Top 10 Nationals Achievements). ASCA Level 5 is the highest available certification awarded and this distinction is earned by only 1% of coaches in the country. Kevin is Swim GSA’s head coach and the lead coach of our Platinum Elite, Platinum and Siver Groups.

Kevin earned a B.S. in exercise science from the University of Rhode Island and a Masters in Exercise Physiology - focusing on swimming performance pre and post altitude training exposure in age group swimmers - from University of North Carolina at Greensboro. He has also had certification as a certified strength and conditioning coach (CSCA) from the National Strength and Conditioning Association.

Kevin, his wife Erica, and daughter Braedy - along with Bonkers (pet dog)- live in the Lake Jeannette area of Greensboro. 


Available at times, other than practice times, by appointment (Please call 336.392.5109 to set up meeting)


Katherine Holian Head Age Group Coach

Coach Katherine Holian is the 2020 North Carolina Age Group Coach of the Year, coached a 2020 North Carolina Athlete of the Year and helped lead Swim GSA to the 2020 North Carolina Small Team of the Year Title!

Coach Katherine brings an unmatched passion for aquatics and coaching experience as Head Age Group Coach at Swim GSA. She focuses on high character coaching, with an emphasis on technique and competition readiness at all level. She currently leads our Bronze and Gold training groups and directs the Swim GSA Age Group progression (Copper, Bronze, Silver, Gold).

Prior to joining Swim GSA in 2017, Coach Katherine served as Assistant Head Coach of the Fontana Aquatics Club in Southern California. She has contributed several programs to Swim GSA, including the BEAST award to recognize personal best times and the Fish Bowl to promote parent support and education.

Coach Katherine's swimmers have consistently qualified for the highest level of Age Group competition, earned Top 5 and All Star recognition, and achieved NAG Top 10. Most recently, at the 2020 NC Age Group Championships, her athletes claimed NC State Titles in 4 individual and 2 relay events. She also had a swimmer set an NC State Record.

Coach Katherine has achieved the American Swim Coach Association (ASCA) Education Level 5 and the ASCA Achievement Level 3. She is an honored ASCA 2017 Fellow, having published the article “Coaching Gen Z” to highlight their research on the successful coaching of our current athletes. Coach Katherine currently serves on the North Carolina Swimming Board of Directors and is the 2020 NC LSC Chair of Camps and Clinics.

Katherine is a graduate of the University of California at Santa Cruz, received a teaching credential from San Francisco State, and earned a Master’s Degree in Medical Sociology from the University of California at San Francisco.

Katherine and her family live in the Lake Jeanette community where she also enjoys coaching the LJ Lightning in the summer.

You can reach Coach Katherine at (909) 803-4387 or [email protected]

Katie Quillen Coach
Born and raised in Greensboro, Katie has been involved within swimming community for 18 years, as a swimmer and coach. Her competitive swimming experience encompasses summer league, high school, and SwimGSA. Katie began coaching in 2009 and joined the coaching staff at SwimGSA in 2017. She currently coaches the Copper and Steel training groups. Katie believes in technique-based instruction while challenging each swimmer to be their best self. She has a high enery and positive coaching style. She enjoys and has been successful in coaching swimmers of all ages and abilities. Katie is in the process of completing ASCA education Levels 1-5 and is a an ASCA Level 2 coach. Most recently, Katie was selected to serve on the 2020 NCS Select Camp and Zone Team Staff.
Katie earned a B.S. in Rehabilitation Services and a Master’s Degree in Clinical Counseling from East Carolina University. When Katie is not on deck coaching, she enjoys spending time with family and friends, eating sushi, watching football, and being outdoors. Katie loves being apart of SwimGSA and cannot wait to see you on deck! 
You can reach Coach Katie at (336) 681-8731 or [email protected]
Diane Quillen Coach
Diane has been involved in the Greensboro swimming community since 2000 when her 2 daughters started swimming. In 2007 she joined the coaching staff at SwimGSA.  She has a Level 2 ASCA certification. Diane began swimming at age 7 in Peoria, Illinois and continued swimming through high school with the Lynchburg, Virginia YMCA.  She loves teaching swimming and still competes at the state and national level as a US Masters Swimmer!! Diane graduated from Appalachian State University and is the owner of At Home Care.  She loves to swim, hang out with her family and 3 dogs – Simba, Nala and Daisy. Diane’s favorite saying is “Strong kickers make Strong swimmers!!”
Brandon Pittman Coach

Brandon has been involved with the swimming community in Greensboro, both as a swimmer and a coach, for 17 years. His swimming experience started at the Greensboro Elks Stampede where he swam for 13 years. Brandon also swam for Page High School where he earned Varsity letters all four years, and was a senior co-captain. Brandon started coaching as an intern coach for the Elks Stampede in 2009, and the following year he was an assistant coach. He also coached for the Southeast Tigersharks as an assistant coach for 3 years.

Brandon graduated from East Carolina University in the fall of 2015. He is a huge Carolina Panthers fan, and his favorite stroke is Butterfly. Brandon enjoys coaching swimmers of all ages, and sharing his passion for the sport of swimming. His enthusiasm and love for swimming have shown all throughout his swimming career.

Chrissy Olson Coach

Chrissy has a long history with Greensboro swimming. She grew up swimming for Hamilton Lakes (age 5) and SwimGSA (age 9). She started teaching lessons at age 13 and became a coach at age 17. She swam for Mount Holyoke College where she held the 1000 record for 10 years. Chrissy also swam in Spain and was the Madrid Champion of the 800 in 1988. She has been the Greensboro Day School Swim Coach since 1992 and has led them to several State and Conference Championships. Chrissy coached SwimGSA from 1989-1994 and 2001- present. She has completed the education for ASCA through level 5 and she is an ASCALevel 3 coach. Chrissy completed a graduate teaching certificate and minored in Exercise Science from UNCG in 1992. Her achievmentsand awards are too numerous to list. Chrissy says “I love swimming, the sport of swimming, and coaching. There is no place that I’d rather be than at the pool!!”