After spending eighteen months in Okinawa, Japan, Ennis was assigned to Milwaukee, Wisconsin as a recruiting officer.

In 1986, Ennis was named Naval Representative to the Commander-in-Chief of the Group of Soviet Forces in Germany.

After returning to United States, he completed a Military Fellowship at the Center for Strategic and International Studies.

Since retiring from the Marine Corps, Ennis has served on the Federal Board of Advisors for Benchmark Executive Search.

[5] He appeared in the documentary "Meet The Real Cold War Spies Of BRIXMIS" talking about his time with U.S. Military Liaison Mission (USMLM)[6]