Walter later co-founded the Vidocq society, an exclusive organization of forensic professionals who solve cold cases for law enforcement agencies, worldwide.

He later co-founded a construction firm and helped to run a Tennessee-based transportation company.

He later co-founded and is president of the Marwood Group, a firm that advises corporations about health care and financial services.

He later co-founded the local radio station Radio Oslo.

He later co-founded Nothing Real, a software company that produced the digital compositing application Shake.

He later co-founded the New Country Party, and represented them in the Council until the end of his term.

After the war, he was a railroad executive and later co-founded the city of Tacoma, Washington, serving as its first mayor.

Kimball later co-founded a business selling bonds and insurance which, after weathering the Great Depression, became highly successful.

He later co-founded The Athlete's Edge, an organization offering baseball clinics for private and group instruction.

He later co-founded SmartTouch, a biometric financial transaction processing company.