Coaching Staff


Head Coach - Sean Quackenbush

Sean is an accomplished and experienced athlete and coach. During his swimming career he was the Minnesota High School State Champion in the 100-yard butterfly, a three-time Big Ten Champion and record holder at the University of Minnesota. Sean is a a 12-time All-American and a University of Minnesota Hall of Fame inductee. He was named to the USA National Swim Team and swam in the US Olympic Trials, World Cup Games, and the US Open, where he was a Gold and Silver medalist. In addition to being a highly decorated swimmer, Sean is also an accomplished coach and leader. Following his competitve career, he was an Assistant Coach for the Division 1 swim program at Michigan State University. He holds a MS in Sport Psychology from MSU and has hosted dozens of swim clinics and taught provate lessons from swimmers of all ages.

2022 will be Sean's 7th season with the HOX. In 2019 Sean lead the HOX to VSA league championship, 2nd place at County and an undefeated dual meet season for a second consecutive year. Sean is passionate about transforming good swimmers to become great swimmers. Sean also believes that swimming teaches important life lessons like working hard, setting and striving for goals, competing and forming friendships that last a lifetime. Sean lives in Concord with his wife Natasha and his two sons.

Coach Sean's contact:  [email protected]



Assistant Head Coach - Georgi Cappelletti 

Georgi Cappelletti has been with the HOX for 28 years; 14 as a swimmer and this will be her 14th year as a coach. Her accomplishments in the water include breaking multiple records: the HOX 13-14 50 breast team record, in addition to the 15-18 100 Free record at County, Woodlands and VSA League Championships, which held for several years. She is still the current HOX team record holder in the 100 free. Coach Georgi attended Monte Vista High School in Alamo and was a member of both the Varsity Swim Team and the Varsity Water Polo Team. During her senior year of high school, Georgi’s 200 free relay broke the meet record at NCS.  She went on to play Division 1 Water Polo for two years at University of California, Berkeley and graduated in 2011.

She loved growing up on the Blackhawk pool deck because of the fond memories created, life-long friendships formed, and personal goals achieved. It is her desire to create that same experience for every HOX swimmer she coaches. Georgi brings a tremendous level of dedication and spirit to the team and leads the Hike to Hawk during Spirit Week each summer. She loves coaching kids of all ages, but her specialty is leading the 10 and Unders and instilling a foundation for a long-term commitment to swim and love for the team. She completed her teaching credential in December 2013 and has worked at Tassajara Hills Elementary School since 2014. This year, Georgi earned the title “San Ramon Valley Unified School District’s Elementary Teacher of the Year”. 

Coach Georgi is excited for a summer filled with pop times and lots of team spirit! 

Coach Georgi's contact:  [email protected]



Assistant Coach - Melissa Garchar

Aloha HOX Families! My name is Melissa Garchar and I am originally from Kaneohe, Hawaii. I started swimming year round competitively at the age of 6 and continued throughout college. At the age of 17, I was recruited to Whittier College in Southern California to be a part of the swim and waterpolo team. My top swim events have been the 100/200 Breaststroke and the 200 IM. While attending Whitter, I received my BS in Kinesiology with an emphasis in Physical Education. After graduation, I attended California State University, Long Beach and received my Single Subject Credential for Physical Education. From the age of 18 until present, I have held several jobs in the Aquatics field from teaching swim lessons to managing swim facilities. This will be my 5th year as a High School Physical Education and being the Head Swimming/Diving Coach at Mission San Jose High School in Fremont. I am looking forward to my 5th summer on deck with the HOX. As a coach, I am excited to see these swimmers become the best swimmers they can be!

Coach Melissa's contact:  [email protected]



Assistant Coach - Michelle McConnell

I am very excited to be returning as part of the HOX Coaching Staff for a fourth season! I grew up in Concord, and graduated from Ygnacio Valley High School.  In high school I played water polo, basketball, and was a member of the swim team.  I was the first athlete in the history of my high school to receive 12 varsity letters for the sports in which I played, and in 2015 was inducted into the Ygnacio Valley High School Athletic Hall of Fame. Upon graduating high school, I attended Brigham Young University where I received my Bachelor of Science Degree in Physical Education Teaching, Kindergarten through 12th grade and a minor in Spanish.  I returned to Ygnacio Valley High School to teach Physical Education for two years before returning to school to receive my Master of Arts Degree in Education, with an emphasis in Athletes and Academic Achievement from the University of California, Berkeley.  This is my 15th year teaching in the San Ramon Valley School District.  I taught Physical Education and was the Assistant Athletic Director at Monte Vista High School two years before coming to teach Elementary PE at Creekside.  I have over twenty years of swim coaching experience coaching at Ygnacio Wood Swim Team, Valley Vista Swim Team, Roundhill Swim Team, and at the HOX the last 4 years.  I love the sport and hope to help my swimmers have the same passion for it that I do.  

I am married to Jason McConnell, and we have a 13-year-old daughter named Mia, and 7-year-old son William who are proud members of the HOX as well.  I am looking forward to a great summer at Blackhawk.  Go HOX!

Coach Michelle's contact:  [email protected]



Assistant Coach - Livvy Hodson

Livvy Hodson was born a "Jersey Girl" and moved to Danville when she was 8 years old. She began her competitive career at age of 7, swimming for both her NJ club and rec swim teams. She joined the HOX at the age of 9 and swam for the team every summer with her two brothers until she graduated off the team. She was a county qualifier and consistently finished within the top 20. Livvy began assisting the Mini HOX program six years ago and has continued to spend her summers at HOX pool, working as a Jumior Coach and Mini HOX coach even after her high school graduation. Livvy was a varsity swimmer and water polo player for San Ramon Valley High School, graduating with honors in 2020. Currently a junior at San Diego State University, she is studying to earn a Bachelor of Science in Business. Livvy's favorite part of summer growing up was spending so much time with her friends around the pool. Always a champion of the underdog, Livvy is excited to keep the winning tradition at HOX by inspiring and motivating every swimmer she works with!

Coach Livvy's contact:  [email protected]



Assistant Coach - Coach Spencer

Hello HOX Families! My name is Spencer Tsubota and I am thrilled to be returning to this team for my second year as an assistant coach. I was born and raised here in the Bay Area and previously swam for the HOX for 8 years. I went to Monte Vista High School and graduated in 2020 right as the pandemic started taking over. While attending Monte Vista as well as swimming on the HOX I competed in my favorite events of the 100 Butterfly and 200 Individual Medley. Currently, I work as a lead dispatcher/pilot in training for a private charter company based out of the Oakland Airport and split my time between flying and coaching your kids. While on the HOX I had the wonderful opportunity to make so many great friends, many of who I still am connected with today; now I have the opportunity to be on the other end of things and help coach these amazing kids. I am beyond grateful to have the opportunity to have swimmers back in the water for another - hopefully undefeated - great season this summer! GO HOX!

Coach Spencer's contact:  [email protected]


Assistant Coach - Abby Sprague

Abby Sprague started swimming when she was 3 years old and joined HOX when she was 5. She swam with Blackhawk until she graduated last year in 2021. Abby helped with the Mini HOX program for the last 6 years and has spent many hours on the pool deck. Abby was varsity swimmer for the Monte Vista High School swim team and graduated last year. She is currently going into her 2nd year at Cal Poly SLO. Abby is so excited to start her first summer as an assistant coach and can’t wait to be on the pool deck!


Coach Abby's contact:  [email protected]