About Us

Medical Officer, Ltd. is based in Crested Butte, Colorado, and operates primarily as an instructor-sponsor of Wilderness Medical Associates courses. We also build custom medical kits and sell a few high-quality rescue related products that we have field-tested and found worthy. We are seasoned practitioners and expert instructors. We are also sailors, mountaineers, horsemen, skiers and, above all, your colleagues in the field.
Jeffrey Isaac, PA-C is the President of Medical Officer, Ltd. and Curriculum Director for Wilderness Medical Associates International. He is co-author of Wilderness and Rescue Medicine and The Outward Bound Wilderness First Aid Handbook used as textbooks in WMA courses worldwide. His teaching reflects the experience of 35 years in emergency medicine, outdoor education, and wilderness rescue. He has served as an ambulance and fire/rescue crewman, professional ski patroller, emergency department practitioner and on the medical staff of three ski area trauma clinics. He is currently the Director of the Gunnison Valley Health Mountain Clinic in Crested Butte, Colorado where he also serves as team leader and medical officer for Crested Butte Mountain Rescue.
     Jeffrey is also a USCG licensed captain and an experienced blue-water sailor, having logged thousands of miles aboard his own sloop as well as serving as mate and medical officer on sail-training and research vessels. His marine resume includes twenty seasons as an instructor, course director, and vessel master with The Hurricane Island Outward Bound School.
Erik Forsythe, WEMT-P is a paramedic supervisor with the Crested Butte Fire Protection District and the Director of the Gunnison Valley Hospital EMS system, a team leader with Crested Butte Mountain Rescue and a flight paramedic with Tri State CareFlight.  Erik served 19 years with the Crested Butte Professional Ski Patrol, the last four as director. He is a member of the Black Canyon National Park Technical Rescue Team and the owner of Professional Rescue Training, LLC, specializing in technical rope rescue. He has been teaching wilderness medicine programs since 1994 and became an instructor with Wilderness Medical Associates in 2000. He teaches for WMA all over the United States, and in Belgium, Finland and Hong Kong.
Brad Sablosky, WEMT-P became interested in wilderness medicine during his 13 year career as a river guide in Northern Canada. After hanging up his guide paddle he served for 5 years as the Director of Langskib Wilderness Program in Northern Ontario. He has worked as a senior field instructor for Aspen Achievement Academy and sits on several charitable boards for outdoor education organizations. He has been teaching with Wilderness Medical Associates and Medical Officer, Ltd. since 2003.
     Brad serves as an ALS crewmember with Durango Fire and Rescue and La Plata County Search and Rescue in Colorado and has just completed paramedic training at Swedish Medical Center in Denver. In the winter he serves as a professional patroller and the training supervisor for the Purgatory Mountain Ski Patrol. Brad is a private pilot and owner of a Cessna Skywagon with which he explores North America from the desert southwest to the Canadian Arctic.
David Johnson, MD is a board-certified emergency physician and President and Medical Director of Wilderness Medical Associates, Inc. His participation in trans-Atlantic sailing expeditions and numerous treks in North and South America, coupled with 30 years in urban and rural emergency medicine, have given him a broad base of experience in patient care in difficult and demanding situations.
     Dr. Johnson is a frequent conference presenter and author, and has taught all levels of EMS and wilderness medicine courses throughout the US and in some of the more far-flung corners of the world. He is co-author of Wilderness and Rescue Medicine, WMA's text used in coures worldwide. He has been recognized by Outward Bound USA with the McGory Award for outstanding contributions to experiential education. He is well known for his low-key teaching style and exceptional ability to relate complex medical issues to the elemental principles of wilderness medicine. He is also known for being firmly committed to the science behind the subject.
Laura Wininger is a horsewoman and sailor by choice, and a designer by trade. When she’s not occupied designing a house or taking care our business she enjoys a quiet anchorage in the islands or riding backcountry on a pack trip. She has sailed extensively on the coast of Maine, and spent two years as a live-aboard cruising the US East Coast, Bahamas, and Caribbean.

Laura’s training history includes EMT, Wilderness First Responder, Offshore Emergency Medicine, and two years on the clinic staff at the Sugarloaf/USA ski area. She serves as an assistant instructor for our marine medicine courses, and has been instrumental in the design and development of our marine and backcountry medical kits.
S.V. Woodstock is a Cape Dory 33 sloop and our chief research associate for Offshore Emergency Medicine. She is an experienced sailor and a specialist in reality therapy. She has proven particularly adept at challenging our assumptions about what works, fits, and survives at sea. Woodstock homeports in Maine where she enjoys skinning knuckles, shattering illusions, testing theories, and ensuring that we continue to speak the truth.

To those in the field...

Medical Officer, Ltd. is based in the heart of the Colorado Rockies and is an Instructor Sponsor of Wilderness Medical Associates courses in Crested Butte, Denver, Durango, Moab and beyond. We are also retailers for Conterra products and our own custom medical kits.