About Us

Interface's most valuable resource is its experienced personnel. Our clients have over 100 years of Federal Government experience at their disposal.

Account Executives

Rudy R. Nessel: Over 35 years experience in Federal marketing/sales and consulting. Has developed over one billion dollars in Federal Government Contracts for clients with civilian and Department of Defense Agencies. Consultant on e-commerce (business to government) and General Services Administration procurement. Mr. Nessel holds a BS-Mechanical Engineering, Rensselaer Polytechinic Intstitute and an MBA-Marketing, Northwestern University.

David C. Knapp: Over 25 years experience in Federal marketing and sales. Areas of special expertise include General Services Administration, Defense Logistics Agency and Department of Defense for industrial hygiene, safety related products, analytical instruments, environmental/maintenance services, specialty cleaning products and services. Mr. Knapp holds a BA-Administrative Sciences, Yale University.

Robert G. Williams: Over 30 years experience in Federal marketing/sales and legislative affairs. Areas of special expertise include General Services Administration, Defense Logistics Agency, Department of Defense and Federal Prison Industries for electrical, appliance, air filtration, pumps and other industrial product areas. Mr. Williams holds a BS-Aerospace Engineering, University of Virginia and an MBA-Finance, American University.

Albert B. Rosenbaum III: Over 25 years of experience in Federal legislative and regulatory affairs and sales. Areas of special expertise include General Services Administration, Defense Logistics Agency and Department of Defense for electrical power, transportation, specialty vehicles and physical security products. Mr. Rosenbaum holds a BS-Industrial Management, Georgia Institute of Technology.

Michele Zentner:
Over 20 years of experience facilitating federal procurement contracts. Mrs. Zentner is a recognized expert throughout industry on the contractual requirements, policies and guidelines of each agency within the federal government. Mrs. Zentner also serves as Co-Chairwoman of GSA’s Alliance Board in Region 7, and participates in various other government / industry committees and working groups.

Mark M. Downs: A former Naval Officer with active duty experience in logistics and operations. Areas of expertise include General Service Administration, Department of Defense, and civilian agencies for transportation and energy related products. Mr. Downs holds a BA in Psychology from Randolph-Macon College, and an MBA from The George Washington University.

Associate

Cathy Hester provides specialized support to Interface clients in the areas of marketing, business development and contract administration. She is active in the various professional organizations to which Interface belongs.

History of Interface

Interface was founded in 1967 by Rudy R. Nessel, and James C (Jim) Downs. During his early tenure in Washington DC managing the government contracts of a large industrial manufacturer, Rudy found his advice and counsel frequently sought by friends and colleagues working outside of the federal arena, in the course of their efforts to develop or expand their companies’ government business.

Jim had cut his teeth as a Washington DC based manufacturer’s agent selling large volumes of specialized safety equipment and other supplies to the Defense Department and the General Services Administration. When Jim and Rudy first began discussing their respective areas of involvement, it became apparent that their skills could be utilized by companies across a diverse assortment of industries that found themselves facing many of the same challenges. It was from this perspective that Rudy and Jim formed Interface Incorporated.

Much has changed since Interface opened the doors and afforded their first clients a Washington DC based presence, but the need for a comprehensive understanding of the federal marketplace remains as strong today as it was over 40 years ago. Interface has remained small in size, but robust in experience to offer personalized and effective service to each client, many of which have been with the company since its early years.