Yes, on his wiki page it list underwater operations as one of his specialities.
Olson graduated from the United States Naval Academy in 1973 and qualified as a Naval Special Warfare (SEAL) officer in 1974. He graduated in BUD/S Class 76. He has served operationally in an Underwater Demolition Team, SEAL Team, SEAL Delivery Vehicle Team, Special Boat Squadron, and at the Naval Special Warfare Development Group.
He probably had something to do with the Moskva cruiser attack.
Yes, on his wiki page it list underwater operations as one of his specialities.