Coaches and Directors

Coaches and Directors
Coaching Staff
Brad Isham Head Coach/CEO

As Head Coach and CEO, Brad Isham oversees the development and direction of the Cincinnati Marlins, and serves as the National group lead coach.  Brad brings to the Cincinnati Marlins 20+ years of experience in coaching competitive swimming at all levels. Prior to the Marlins Brad was Head Coach at Countryside YMCA in Lebanon, Ohio from 2001-2017.  While at Countryside Brad demonstrated success by winning 2 YMCA Team National Championships and by coaching high performing swimmers whose achievements included Olympic Trials Qualifiers, Senior and Junior National Qualifiers, and 94 YMCA Individual National Champions.  Additionally, Brad was named YMCA National Coach of the Year in 2000, 2005, 2014.

Brad also served as Head Coach for Ursuline Academy (UA) from 2009 - 2017. Under Brad’s leadership, UA won 2 Ohio High School State Championships and 6 GGCL Conference titles.  Brad earned several High School Coach of the Year honors as Head Coach at UA. Brad was Head Coach for Kings High School for 6 years prior to coaching UA.

Brad is a native of Canton, Ohio.  He attended University Cincinnati, where he earned a Bachelors Degree in 1995.  Brad and his wife Jocelyn have 2 children.


Brandon Voorhies Senior Program Director

Brandon attended “The” Ohio State University where he was president of the club swim team for two years.  During his presidency, the club won the CCS Combined National Title. Brandon was a member of the Countryside YMCA coaching staff as the Head Age Group Coach since the spring of 2018.  He has developed many swimmers to JO and National levels and has assisted in coaching swimmers to Y National top 8 finishes and USA Top 20 rankings.  Brandon’s duties as Senior Program Director will have him coaching our Blue & Blue 1 groups as well as Red & Red 1.  He will focus on a cohesive transition from our age group program into our senior-level program.  Brandon will be an outstanding fit with our Marlin team. He will work very hard to see all swimmers in the program achieve the highest levels.

Tammi Morris Head Age Group Coach
Hailey Olson NKU Site Lead - National, Blue & Blue 1

Hailey is from Cincinnati, Ohio, where she swam and coached for the M.E. Lyons Anderson Barracudas. She  graduated from Denison University with a Bachelor's in Psychology, and she swam for the varsity women's swim team for four years.  Hailey brings her passion for swimming and her enthusiasm for coaching to the Marlins at NKU.

Matthew Harrison Five Seasons Site Lead - Red 1 & 2

Matt has been coaching swimming for over 15 years.  Matt has coached with Blue Ash YMCA, Countryside YMCA, as well as the WTRC Sharks.  Matt also coaches high school swimming. He spent 13 years as an Assistant Coach at his Alma Mater Moeller High School. In his first season as Head Coach at Indian Hill High School, he led the Boys team to the 2020 Division 2 State Championship, the first in school history!


Matt has received several coaching awards recently including - 2016 YMCA of Greater Cincinnati Age Group Coach of the Year, 2020 Cincinnati Hills League Coach of the Year, 2020 and 2021 Cincinnati Enquirer Division 2 Coach of the Year


Kathleen Burns NKU Assistant

Kathy Burns grew up in Cincinnati. She started her swimming when she was 8 years old. She started helping her coach with the younger group when she was only a teenager.  This is where she found her love of coaching. She had the privilege of coaching under some great coaches in her many years. Kathy comes to the Marlins from the Sea Wolves to coach for the West Clermont Marlins site. 

Jeff Stueve Keating National Asst Coach

Jeff joined the Marlins in the spring of 2017. He was previously an assistant coach with the Countryside Torpedoes from 2003-2017. From 2003-2007 he was the lead coach for the 11-12 age group and from 2007-2008 the lead coach for the 13-14 age group. He was an assistant National Group coach from 2004-2017. He was the Head Coach at Mount Notre Dame High School from 2011-2013. He is presently a partner in the Lebanon, Ohio law firm of Fowler & Stueve. Jeff and his wife Jenn have four children.

Mariann Strenk Keating National Asst Coach

Mimi Strenk will be working with the National Group. Before coming to Marlins Central, Mimi was Head Site Coach at Marlins West where she coached the Gold group.  Prior to coaching for the Marlins, she coached at OHST for 4 years. Mimi also coached at McAuley High School for 4 years and was named GGCL Coach of the Year twice.  She also coached at Oak Hills Swim and Racquet Club. Mimi swam for Gamble Nippert YMCA, Mother of Mercy High School, and  St. Louis University where she swam on an athletic scholarship.

Connor Blatt Keating Blue/Blue 1

Coach Connor joined the Marlins in Summer 2020. Connor is a graduate of Carroll High School in Dayton, where he was a state and national meet qualifier. He then competed at the University of Cincinnati for one season, becoming a finalist at the 2019 American Athletic Conference Championships. He is currently continuing school at UC. Connor has experience working with several top-level coaches and coached for his hometown Dayton Raiders for one season.

Witkor Serafin Keating Red 2

Wiktor (Victor) joined the Marlins in the fall of 2021. From 2017 to 2021 he was an assistant coach, then a lead group coach for Gold (10-13 old) and Silver (8-11 old) groups, with the Western Wahoos in DE, when he relocated to OH.  He has consistently developed multiple Junior Olympics and Zones qualifiers.   Wiktor has been involved with the sport since childhood. He started swimming at the age of 6 in Poland and continued to swim after a move to Canada.  Swimming achievements consisted of qualifying for short course junior championships in Poland, international meets in Russia, Czechoslovakia and various provincial and high school meets in Canada, attending both short and long course meets. Outside of the pool,  Wiktor is employed by GE Aviation in an engineering role and have over 30 years' experience working for big and small companies in various engineering roles. Wiktor and his wife Agnes have two kids who will be swimming with the Marlins.


Andrew Gantzer Keating Red 2&3

Andy swam with Oak Hills Swimming Torpedoes early in his career.  While attending Oak Hills High School he was a three time State Qualifier, named GMC Swimmer of the Year and team MVS (most valuable swimmer).  After high school he attended Eastern Michigan University.  While a member of the swim team as a freshman he placed 3rd in 200y Freestyle at MAC Championships and was a member of the gold medal 200y, 400y, and 800y Freestyle relays.  Sophomore year he placed 7th in the 200y Freestyle and was a member of the 1st place 800y Freestyle relay. Sophomore year the team was the 2007 MAC Champions. Both years he earned second team All-Conference recognition.
Andy has coached with the Oak Hills Swimming Torpedo's as well as Moeller and Mt. Notre Dame Swimming.  He has specialized coaching in all strokes and all distances.  He is knowledgeable in the sport of swimming and strives to keep learning.  He likes to concentrate on technique and the mental aspect of swimming.
In his off time he enjoys going to Reds games, playing softball, visiting friends from college, and being home with his family.    He lives with his wife Heather, and his daughter Kaylie in Delhi.

Alex Schmidt Keating Red 3
Jocelyn Isham Keating Red 4

As an age group swimmer Jocelyn started with the Marlins and also swam for a club in Southeast Indiana.  She was a district and state qualifer representing McAuley high school. Jocelyn began coaching swimming and teaching lessons in Indiana while she was in high school.   In 1995 Jocelyn started at Gamble Nippert YMCA where she worked with the 8&under, 9-10 and 11-12 groups (and met the man of her dreams).  Since then, she has been following Brad around and coaching his 8&unders. First at Countryside for 9 years and now here at the Marlins. When she is not at the pool, Jocelyn works in a Special Education classroom and is raising two high school children that swim for the Marlins. Jocelyn is very excited to be back on deck working with the Red 4 group.

Mavis Bushelman Keating White

Maggie started her competitive swimming career with the Northern Kentucky Clippers at age 6. She joined the Marlins from 2002-2008. Her coaching career began in high school when she began to teach private lessons and coach at the Beechwood Swim Club (NKSL). Maggie then went on to coach her first USA team, Shockwave Aquatic Team, while attending the University of Mississippi. Since she's been back in the area Maggie has been an assistant coach of Highlands High School leading them to 2 Regional championships and two 3rd place boys team finishes at State.   Maggie has also been an assistant coach for the Five Seasons Gators (NKSL) during summers 2018 and 2019. In 2019 the Gators went undefeated and won the league championship meet.

Aaron Dorfman NKU National, Blue & Blue 1

Aaron has been involved with the sport of swimming for almost 30 years.  He grew up in Colerain Township and started swimming for Orchard Hill Swim Club (where he was in the exhibition heat every single meet). At age 14, he committed more to the sport (backing off from cello and other sports) to focus more on swimming.    He swam competitively for Powel Crosley YMCA and was a Y National qualifier in both the Spring and Summer.  Aaron swam for the University of Cincinnati and graduated with a degree in Dietetics.  He then went on to complete his dietetic internship at Marshall University and a Masters in Nutrition.

Aaron has coached at Clippard YMCA, Gamble Nippert YMCA (with Coach Brad – 2000 YMCA LC Champs) and he founded the Mercy HealthPlex Sea Wolves.  Under Aaron’s leadership, the Sea Wolves grew from five swimmers to over 285, two training sites to four, two coaches to 14, jumped from a 3,000 ranking to the top 150 nationally, qualified an Olympic Trials athlete (high school swimmer) in 2015, achieved multiple top 10 finishes at the Junior Olympic meet, trained multiple state champions, coached LSC record holders and was selected to attend the USA Swimming Diversity Clinic in 2015.

Aaron has a full time job in career development for a real estate brokerage in Ft. Wright, KY.  He lives in Anderson Township with his wife and children.



William Allen NKU Red 1 A&B
Matt Williams NKU Red 2
Matt Joined the Marlins in the summer of 2021. Matt hails from Gibraltar, Michigan and swam at Club Wolverine for 7 years. Later Matt began swimming at Xavier University in the 19-20 season. He competes in the 100, 200 Breaststroke and 200 IM. 
Laura Pahren Five Seasons Red 3

Laura is a Cincinnati native, having grown up a few miles from Keating.  She graduated from Wyoming High School while swimming for the Cincinnati Marlins. She continued her swimming career at the University of Cincinnati while pursuing a degree in Mechanical Engineering. Currently, she is a data scientist at Procter & Gamble and working on her PhD in Mechanical Engineering at UC. She began coaching with the Marlins in 2019 after coaching several years for Madeira High School's swim team and a year with Mason High School's cross country team. Laura has loved coming back home to coach for the Marlins to pay forward the lessons and experiences they provided her. 

Anthony Roberts II Five Seasons Red 4

Tony Roberts comes to the Marlins from the staff the Sycamore Flying Fish.  Tony has over 15 years of coaching experience working with young swimmers.  His enthusiasm and knowledge of the sport has earned him respect among Cincinnati’s coaches, parents and swimmers.  An Indiana University graduate, Tony also teaches math in the Cincinnati Public Schools.

Jennifer Hedger Business Manager
Board of Directors
Brad Isham Head Coach/CEO
Andrew Nixon President
Kara Hlebak Membership
Steve Connock Dues Assistance