Consulting, Engineering Gerry A. Mattern Posted by Who's Who Site Administrator on June 1, 2018June 1, 2018 Most Recent Title: Electrical Engineer, Consultant Industry: Engineering, Consulting Years in Industry: 53 Years affiliated with Marquis Who’s Who: 19 Contact Gerry A. Mattern: Name(required) Email(required) Website Comment(required) Share this:TwitterFacebookLinkedInLike this:Like Loading...