Meet the Executives

Gary Treisman
President and CEO
Mr. Treisman started Machinery Network in 1987 and managed, appraised, and sold over $1 billion worth of machinery and related industrial assets. As the machine sales industry has grown, Gary created Machinery Network Auctions to working with clients to auction or liquidate their surplus assets. Gary received his education at University of the Witwatersrand. He was a stock broker from 1982 to 1987. Gary sat on the board for Location Machinery and has held several leadership roles in multiple business organizations. He is an active member of MDNA (Machinery Dealers National Association) and AMEA (Association of Machinery and Equipment Appraisers).
Eric Raffin
Vice President of Auction Services
Eric joined Machinery Network Auctions after 7 years as founding partner and managing member of a successful post-conviction, sentencing, and criminal trial consulting firm in Los Angeles. Prior to that, he spent over 20 years in executive level sales and marketing. Eric graduated with honors from UCLA and earned his law degree from Loyola Law School. With his background and experience, Eric brings a fresh and dynamic approach to providing MNA’s new and existing clients the service and professional attention they have come to expect. He is originally from Oregon, but has lived in Los Angeles since 1984 and is proud to say that he plans to call this wonderful city his home forever.
Tad Diemer
Marketing Coordinator
With a background in both sales and marketing, Tad works closely with the sales team to ensure the flow of new and sold inventory is accounted for with daily checkups through our sales team and their respective clients. He is also responsible for the marketing and advertising of inventory in various metalworking and manufacturing related publications and media. Tad strives to innovate and exceed expectations in both his personal and professional lives.