David O'Hara was 18 in Comfort and Joy when he played the character 'Engineer'.
That was over 40 years ago in 1984.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 58, and has starred in 50 movies in total, 49 of those since Comfort and Joy was released.
In Comfort and Joy, I think David O'Hara looks: