Team Sheeper Coaches and Staff


Tim Sheeper

Tim Sheeper

Founder and Head Coach

For over 20 years Tim Sheeper has coached athletes of all ages at the beginner, intermediate, and elite levels. Tim's passion for  building a community of multisport athletes resulted in the formation of Team Sheeper in the mid 1990's. Find out more about team history.

Tim has been competing in triathlons for more than 25 years and has been racing in running competitions since the age of 8. While Tim has competed at the age group level, he has competed as a pro triathlete since the late 80's and has no plans of stopping.

Tim's mission in life is to encourage and motivate people to live a life full of activity — strengthening both the body and the mind. He is interested in enabling the discovery that one is capable of doing much more in life than thought possible.

Tim also makes family a priority. He has three children who are active in sports and his wife Lisa is herself a champion swimmer and team advocate. Tim's interest in developing whole-person athletes extends to including families in Team Sheeper activities and supporting members' personal commitments.

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Mike Osmond

Mike Osmond

Team Manager

Mike graciously holds the post of organizer, communicator, and ombudsman for Team Sheeper. He is deeply involved in triathlon as a sport, in current thinking about training methods, racing strategy, and team dynamics. So Mike brings a wealth of knowledge as well as great energy to the team. He is your day-to-day resource for team logistics and news, so don't hesitate to "Ask Mike."

A Team Sheeper member since 2002, Mike has completed 5 Ironman triathlons and is an avid runner with at least 10 marathons to his name.

When not immersed in sport, Mike works for World Wildlife Fund, utilizing his expertise in marine protected areas and fisheries bycatch to address conservation issues in various parts of the world. Prior to joining World Wildlife Fund, Mike (an Australian) worked on the Great Barrier Reef and in Western Australia as a marine park ranger. He also spent a number of years coordinating humpback whales research across the Pacific.

Contact Mike directly.

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Tanja Sattler

Tanja M. Sattler

Cycling Coach

Tanja has been participating in endurance sports for over 15 years. Bringing a depth of experience in mid- to long-distance efforts, she greatly enjoys working with experienced beginners to help them establish speed and endurance on the bike. Working closely with Triathlon Coach Hani Juha, Tanja carefully crafts a training experience to offer Level 2 athletes the opportunity to improve racing performance and advance their knowledge of training techniques.


Tanja has been a member of Team Sheeper since 2006 and has over 10 years of triathlon racing experience, including Ironman, Half Ironman distances, 14 years of experience in marathoning and has completed several ultra distance events including ultra marathon and Sheeper bike tours. She has a passion for training in the coastal hills of Northern California and enjoys sharing not only the rewarding experience of cycling but the beautiful training routes throughout central and coastal Northern California.

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