This is (I believe) a 1980s series of books set in the US after a nuclear war. The central characters I think are constant across the books although I only read one of them. One character is a weapons and explosives expert. The story features secret US government teleportation technology developed before the war and located around the country in facilities like Cheyenne Mountain.
"Deathlands" by James Axler comes to mind.
It has a main character, "Ryan Cawdor", who is a explosive and gun expert, a amnesiac doctor who actually is a time travel experiment. The story series features extensive teleporter networks hidden in bunkers over the United States, usually with a stockpile of supplies that were kept for post apocalyptic emergencies, and the series takes place after the world has experienced a nuclear war.
It's like Fallout with more science fiction, sex, violence, guns and explosive experts, mutants, and teleporters.