Much of his freelance work involves historical topics, especially military history. He was a lead contributor to the 1995 WWII anthology, "From Pearl Harbor to Nagasaki: America at War," published by the Retired Officer Association. He also contributed to the American Civil War anthology "Gettysburg: Three Days that Saved the United States," published by I-5 Publishing.
Martin's short stories have appeared in such publications as Alfred Hitchcock Mystery Magazine, ALT HIST: The Journal of Historical Fiction and Alternative History, Mystery Weekly Magazine, Crimson Streets, Nebula Rift, the Plan B Mystery Anthology, and others. His first book, DUTY, was named the Best Short Story Anthology/Collection by the San Diego Book Awards Association (SDBAA). His first novel, The Killing Depths, was a 2013 finalist for the SDBAA Sisters In Crime Mystery Award, as was Empty Places in 2014. Eden was a finalist for the SDBAA's Best Science Fiction book in 2015.
A veteran of the Coast Guard and Navy reserves, Martin finally retired as a military police major from a component of of the California National Guard. Martin also served as a tactically-trained medic with his local Sheriff's wilderness search and rescue unit, and as a medic and security specialist with a federal Disaster Medical Assistance Team.
Martin is a professional member of the Mystery Writers of America, Sisters in Crime, and International Thriller Writers.