Architectural Designer, City of Chicago Architect's Office, 1941-1942; Draftsman, John W. Maloney, Architect, Seattle, WA, 1942-1943; Architectural Engineer, Pan American World Airways, 1943-1947;

When surveyed in 1955, Lindhal indicated that he was a Registered Architect in the States of WA, AK and IL, and also was NCARB Certified.

B.S., Armour Institute of Technology, Chicago, IL, 1939;

Lindhal served in the U.S. Naval Reserve.