Marsh & Mclennan Companies


Our executives have an average of more than 25 years of aviation experience. Our collective career history gives us the breadth and scope to offer practical advice to domestic and international aviation and travel-related companies.

David Marcontell

General Manager

Dave focuses on strategic planning, operational performance improvement, new aircraft entry-in-service, flight operations authority expansion, merger and acquisition due diligence, organizational structure and design, and engineering and maintenance planning. He leads the M&E Solutions business and is a certified six sigma black belt and an FAA licensed pilot and mechanic.

Allan Bachan

Vice President

Allan is a highly regarded individual in the aviation community with 27 years of industry experience as an aviation M&E and MRO business solutions and software systems domain expert.

Oksana Bardygula

Vice President

For nearly 30 years, Oksana has advised companies on strategy development, operational improvement and change management across a wide range of functions including maintenance, engineering, reliability, supply chain management and information technology.

Tom Cooper

Vice President

Tom has more than 20 years of aviation and manufacturing leadership experience including aircraft engineering, maintenance programs, maintenance planning, technical publications, fleet projects, regulatory compliance, and FAA liaison.

Steve Douglas

Vice President

Steve brings over 38 years of aviation experience to CAVOK. He has extensive expertise in maintenance program philosophy and methodology, FAA rulemaking process, exemptions, and deviations, strategic change management, and development of international programs.

Mary Zobrak

Vice President

Mary has more than 20 years of experience in aviation training, manual development, and air carrier operations. Her work at CAVOK focuses on new certifications, mergers, safety, and compliance.

Roger Lehman

Oliver Wyman Partner and Global Transportation Lead

Roger has more than 19 years of experience consulting to aviation and aerospace clients. He is an expert on airline strategy, restructuring, supply chain and operations.

Chris Spafford

Oliver Wyman Partner and Lead CAVOK Advisor

Chris has more than 15 years of consulting experience, helping clients including airlines, the manufacturers and MROs for every major aircraft, engine, and parts.