ATRIF Leadership

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Samuel Engel

I have been untangling knots in the aviation business for over 20 years. I relish the complexity this business poses and enjoy tackling problems that reach across technical, financial and commercial issues. As Senior Vice President and Managing Director of Aviation at ICF, I lead a group of 80 experts in all areas of aviation, including finance and strategy for aircraft, airlines and airports. I started my career as a strategy consultant in Budapest in the early 1990s, subsequently specializing in Aviation during business school. I have degrees from Penn and Yale.


DAvid Lee
Airlines for America (A4A)

Economist at Airlines for America. Experienced manager with extensive commercial airline industry marketing experience – network planning, revenue management, demand forecasting, sales, regulatory affairs; demonstrated ability to effectively communicate and work with diverse stakeholders and cross-functional teams, reach consensus and complete tasks; strong research and analytical skills, strategy and financial analysis.


George Ferguson

Senior Aerospace/Defense and Airline analyst and Energy team leader at Bloomberg Intelligence, Bloomberg's research group. Experienced in portfolio management, equity and debt analysis. Served as a U.S. Army intelligence officer (S2) with a tour of Iraq in 2003. Education includes a B.A. in Economics from Penn State University, an MBA with a finance concentration from Rutgers Graduate School of Management. CFA charterholder and a Private Pilot.


LIying Gu


Liying Gu is Vice President, Economic Affairs and Research, leading the association’s economic affairs and research programs. Her many responsibilities include preparing ACI-NA’s economic position papers; representing ACI-NA on economic issues at industry and government meetings; overseeing the ACI-NA Finance and Risk Management Committees; and directing the ACI-NA research programs, which support legislative, regulatory and policy initiatives. She also manages critical policy issues related to airport capital needs, infrastructure development, innovative financing, financial reporting, performance benchmarking, passenger facility charges, rates and charges, airport congestion and risk management.

Gu holds a master’s degree in finance from the Johns Hopkins University, an MBA in aviation from Embry-Riddle Aeronautical University, and is a CFA charterholder.

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Roy Fan

Frontier Airlines

Manager of FP&A specializing in fleet strategy, TechOps, and supply chain in the Ultra Low Cost Carriers (ULCC) space. Roy began his career in aviation data policy and airline/airports consulting, and most recently oversaw aircraft and engine asset management as a Fleet Planning Analyst at Allegiant Air. Roy holds a B.B.A. in accountancy and an MAcc in finance and strategy from the Schulich School of Business at York University.

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Gary Weissel is the Managing Officer of Tronos Aviation Consulting providing a wide range of advisory services to the aviation industry with a unique focus and expertise on aircraft interiors.  Mr. Weissel’s aviation career spans 30 years.  Prior to starting Tronos Aviation Consulting, he spent 14 years at ICF SH&E. Mr. Weissel has also held positions in program management, engineering and interiors at B/E Aerospace and Delta Air Lines.  He is an advisory board member and regular guest lecturer at Georgia Tech’s School of Aerospace Engineering, regularly speaks at industry conferences and has appeared on CNN and NBC as an aviation expert.

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Helen Jiang is a Technical Fellow and senior analyst in Marketing of Boeing Commercial Airplanes, responsible for providing impactful analytics on issues that inform the decisions of leaders in the company and industry.  She has 25 years of global experience, working for Airbus and Aviation Industry of China prior to joining Boeing, holding positions in sales and marketing, strategy, and business planning.  She has extensive experience in engaging with airlines, lessors, investors, appraisers, equity analysts, and regulatory agencies.  She is an expert on industry cyclicality, supply-demand balance, market analytics, forecasting, airplane economic life, and China aviation market.  She was recognized by The Boeing Company for exceptional analytical skills and was selected as full Technical Fellow based on impact and value to the company.

Helen holds a bachelor’s degree in aerospace engineering from China, a master’s degree in aerospace engineering from MIT, and an MBA from the University of Washington.