Brian A Bolster
Head Coach/Aquatics Director
Brian is the founder, Head Coach and CEO of Osprey
Aquatics. Brian is a native of San Jose, grew up swimming
locally and was a Junior National qualifier before accepting a
swimming scholarship to SDSU. Brian has been coaching for 27
years. He has been the Head Coach of Osprey Aquatics since
the fall of 1996. The team started with 26 swimmers and 2
coaches, it now has around 160 year round with 5 coaches.
During his career, Brian has worked with swimmers at every level,
from cabana swimmers, to beginning age groupers to Far Western
Champions, Olympic Trials swimmers and a Para Olympian, Jacque Mox.
Brian is known as an innovator and stroke technician in our
sport, having invented the Bolster Swim Paddle which is sold
worldwide. Under water speed is one of his specialties.
Linnea Mack won short course Junior Nationals in the 100 fly in
2013, in large part because her UW speed was world class.
Brian’s has coached numerous swimmers ranked in the top
ten Nationally. He was named a 2014-2015 National Junior Team
Coach for USA Swimming after Linnea Mack made the team. Forty
five times his swimmers have won individual or relay events at Far
Westerns. They have broken 5 Pac Swim records, won CCS, been
named high school All Americans and won individual events at
Sectionals, as well as received college scholarships to Division 1
Brian has been published in NISCA Swim Magazine, and been
profiled in Swimming World. He was a presenter for FINIS at
the 2012 ASCA Coaches Conference and gave a talk on the topic of
Speed Maintenance as the Winning Edge, how training the ability to
maintain target length (stroke count), and target rate (tempo) is
the key to maintaining speed and winning races at the highest
Brian specializes in helping swimmers improve their mental
approach and mindsets through mental training. He is fond of
saying, “We are what we think about most. Thoughts
become belief and belief becomes behavior.” Mental
training is something the Osprey do all year round, not just before
the big meets. Developing a positive self talk narrative is
critical to success. Winners find reasons why they can, not
why they can’t. The senior group does the most of this work,
and all of his swimmers have a working understanding of what it
means to compete in and how to enter a flow state when
Brian is a Level 4 ASCA coach.
Shannon L Mackin
Team Manager and President
Shannon will be stepping back from coaching this year. As
the team’s longest tenured coach after Brian, she begins her
19th year with the team and will continue in the administrative and
organizational side of things. Shannon is an expert coach,
understanding all facets of our sport. She has coached nearly
every level on the team from SOAR to the Senior 2. With CCS
consolation finalist as well as Far Western Finalists.
Shannon is an ASCA level 3 Coach
Oliver M Mackin
Head Age Group Coach
Oliver coaches the Senior 2 and Gold Groups. This will be
his 12th full year of coaching after 5 additional summers spent
coaching during his college years. Oliver has developed into
an exceptional coach who understands the stroke mechanics, energy
systems, dryland, and sports psychology in a manner that sets him
apart from most other coaches. He is also capable of
insightful observations and suggestions that not only benefit him,
but our entire staff as well. Oliver has trained a CCS
finalist, nationally ranked swimmers and many Far Western Finalists
over the years. Oliver also manages our swim lesson program
and has been a big part of it’s success.
Oliver is an ASCA level 2 coach.
Ian J McAlister
Age Group Coach
Ian is one of our home grown coaches. Ian started swimming
with the Osprey in 2003 and swam for 6 years. As a swimmer he
was a Far Western finalist and swam on the Western Zone team in
2007. He began his coaching with us in 2009. Ian now coaches
the Bronze and AGE (Age Group Elite), however he has coached most
all levels leading up to his current position. Ian has a
swimmers knowledge of the sport and is becoming a good
Ian is an ASCA level 2 coach.
Samuel A Esbenshade
Age Group Coach
Sam began his coaching career with Osprey in 2016. He swam for
the Osprey for 11 years, the last 4 were with Brian in the Sr.
group, where he had success and made finals in the 200 breast at
short course Far Westerns. Sam knows our system very
well, has a good eye for stroke mechanics and has demonstrated
exceptional ability while teaching young people in our swim lesson
program and managing the day to day works of the lesson program
since 2017. Sam’s intelligence, growth mindset,
integrity, work ethic and understanding of the sport will serve him
and the team well. Sam will coach the Varsity, Copper, and
the Silver groups.