Complex sentence: Religious program specialists provide support to naval chaplains in developing programs to meet the needs of U.S. Navy sailors, U.S. Marines, personnel and their families, as well as act as bodyguards for the chaplains (many of whom are unarmed on principle).
Split into simpler sentences: Religious program specialists provide support to naval chaplains in developing programs to meet the needs of U.S. Navy sailors, U.S. Marines, and their families. They also as act as bodyguards for the chaplains (many of whom are unarmed on principle).