VREF Aircraft Value Reference, Appraisal & Litigation Consulting Services the leading provider of aircraft valuations for the aviation industry, continues its 25thAnniversary celebration by adding more staff and specialties to its management team to meet the needs of the business.


VREF has been expanding its specialty expertise’s, which now includes aviation cybersecurity, airport security, avionics, avionics security, and ground equipment appraisal and Litigation consulting. “Offering expertise, consulting, and appraisal work related to cybersecurity and avionics is not something we take lightly. It is a highly specialized field that requires years if not decades of training, certifications, and experience to produce high quality and awe-inspiring results.” Said Jason Zilberbrand President of VREF. “VREF is the only business aviation and for that matter, General Aviation firm that offers the breadth of expertise we do with staff including doctors, lawyers, Federal Agents, Teaching Professors, and A&P technicians and the most knowledgeable appraisal team I have ever worked with,” said Ken Dufour CEO.

VREF brought on Eric Pupye, Esq.in March to oversee Cyber Security, Airport Security, and Avionics Security Expert Witness and Litigation Consulting. Eric is an attorney and  Federal Agent with The Department of Homeland Security, and he has Top Secret Security Clearance. In addition to being an Attorney, Eric is a Certified Protection Professional (CPP) and a Professional Certified Investigator (PCI). Before joining VREF, Eric spent a decade with the NSA, and he was a United States Air Force Branch Chief. Eric is a combat veteran, and he was awarded the Bronze Star. “Eric brings a new skill set and set of specialties to the firm, we are not only honored to be working with him, but it also establishes VREF as the go-to company for all aviation-related litigation support matters,” said Jason Zilberbrand, VREF President and CTO. Mr. Zilberbrand continued, “We are confident that Eric’s talents will be a huge part of our continued growth as we start taking on more sophisticated projects.”

Additionally, VREF opened its third International Office and welcomed Neil Schiller, ASA of Sydney Australia to the team. This is the third International office opened in 2019 including Switzerland and Austria. Neil will be overseeing appraisal and expert witness work in the Oceania region, and he has over 30 years of extensive experience in appraising aviation-related assets including aircraft, helicopters, ground equipment, and airport equipment. Before joining VREF, Neil was in charge of the GECC portfolio of Business aircraft for Australia and New Zealand.

“Eric Pupye and Neil Schiller are welcome additions to VREF. The team we have amassed represents the best talent available in the industry and our commitment to the industry to drive transparency and ethics. We plan on opening additional offices to assist the existing client base,” said Ken Dufour, ASAand CEO of VREF.

About VREF

VREF Aircraft Value Reference, Appraisal & Litigation Consulting Services, was founded in 1994 and is headquartered in Des Moines, Iowa with offices in Chicago, Rockford, Los Angeles, Boise, Daytona Beach, Austria, Switzerland, China, and Australia.

VREF delivers aircraft and engine data through online subscription services (SaaS) and published quarterly digests.

VREF provides valuations, appraisals, and litigation consulting services to a worldwide client base of aviation professionals including, law firms, banks, financial institutions, leasing companies, manufacturers, aircraft owners, aircraft operators, and suppliers. VREF Aircraft Value Reference, Appraisal & Litigation Consulting Services plays a crucial role in advising decision-makers within the aviation industry.

VREF is the Official Valuation Guide and Appraisal company for the AOPA.

For further inquiries or interviews, please contact the VREF team.

E: [email protected]