He served as the superintendent of the United States Merchant Marine Academy from 1987 to 1993 and attained the rank of rear admiral.

In 1955, Krinsky went on active duty with the United States Navy, serving as navigator aboard the USS Everglades (AD-24).

Leaving active duty in 1958, he remained in the United States Naval Reserve and retired as a captain.

In 1958, Krinsky joined the faculty of the Merchant Marine Academy, teaching a wide range of navigation and seamanship courses in the Department of Nautical Sciences.

Over the years, Krinsky held many important posts at the academy, including Director of Admissions, Academic Dean, and Deputy Superintendent.