Capt. Mark Poster, CMI
ABOUT
Since 1996 Poster Marine Consulting has been retained as an expert for agencies, plaintiffs and defendants. Our caseload has included everything from collisions and allisions, non-injury and multiple fatalities, BUI’s, switched operators and hit and runs, falls onboard and persons ejected, skier mishaps and propeller strikes, groundings and sinkings, to fires and explosions.
Captain Poster’s expertise in the field of Boating Safety is attested to by his qualifications, as a former Marine Enforcement Officer, Lake Operations Supervisor, and as a recognized subject matter expert.
As a Lifetime Member and Past-President of the California Boating Safety Officers Association (CBSOA), Poster served on the state’s (DBW) Boating Safety Advisory Committee (BSAC) representing the law enforcement community to propose new safe boating legislation.
As an educator and communicator, Poster has taught boating safety classes for over 30 years. Past students have included the Girl Scouts, the U.S. Marines, the public, youth groups, and organizations. As a Master Instructor in the U.S. Coast Guard Auxiliary, he won the “Best Instructor in the 11th Coast Guard District” Teaching Competition.
As an instructor, Poster is qualified by both the National Safe Boating Council (NSBC) to teach “On the Water Close Quarters” and “Open Water Powerboating”, and by the International Association of Marine Investigators (IAMI) to teach Boating Accident Investigations, Collisions and Single Vessel Accidents, Vessel Operations, Stop and Approach on Vessels.
Poster was Harbor Master of a 650-slip marina, captain of a 125-passenger tour boat, and as Lake Operations Supervisor, was responsible for all annual private and commercial dock inspections, buoy placement, special events, filming, launch ramps and Boating Safety Enforcement.
VOLUNTEER SERVICES - Giving back to the community
Beyond Mark’s professional marine career, he is passionate about providing services to groups involved in the boating community. Over the years, past services have included instruction, instructor qualifications, presentations, training with the following groups.
- Sea Scouts
- Girl Scouts
- U.S. Marine Corps
- U.S. Coast Guard Auxiliary
- U.S. Power Squadron
- U.S. Adaptive Recreation Center
- U.S. Bureau of Reclamation
- National Association of Marine Surveyors
- International Association of Marine Investigators
- National Safe Boating Council
If your group or organization has an interest, please contact us to discuss.

USARC in Action – One of two PWC chase boats with rescue swimmers follows
the sit-skier. When rider falls, one PWC and swimmer responds, the other acts
as perimeter control and ready to assist.