- ABX Air
- Air Canada
- Air Wisconsin
- Alaska Airlines
- Allegiant Travel Company
- All Nippon Airways
- American Airlines
- ATI
- Atlas Air
- Bahamasair
- Compass Airlines
- CommutAir
- Eastern Airlines
- Encore
- Endeavor Air
- Envoy Airlines
- ExpressJet Airlines
- Delta Airlines
- FedEx
- Frontier Airlines
- Hawaiian Airlines
- Horizon Air
- JetBlue Airways
- Mesa Airlines
- Northern Air Cargo
- NetJets
- Piedmont Airlines
- PSA Airlines
- Qatar Airways
- Ravn
- Republic Airlines
- Saudi Arabian Airlines
- Spirit Airlines
- Southwest Airlines
- Sun Country Airlines
- SkyWest
- Trans States Holdings
- United Airlines
- WestJet
- World Airways
- Airlines for America
- Gate Gourmet
- LSG SkyChefs
- Menzies Aviation
- Prospect Airport Services
- Regional Airline Association (RAA)
- Regional Elite Airline Services
- SIMCON
- Swissport
- Textron Aviation
- ABC Financial Services
- Atlas Holdings, LLC
- Bow River Capital
- Grant Thornton
- Imperial Capital
- Banker Lopez Gassler P.A.
- Davis Wright Tremaine
- Emond Harnden LLP
- FordHarrison LLP
- Holland & Hart LLP
- Jones Day
- Littler Mendelson
- Morgan Lewis
- O’Melveny & Myers
- Ogletree Lawfirm
- Paul, Hastings, Janofsky & Walker LLP
- Perkins Coie LLP
- Vinson & Elkins LLP
- Coleman Research Group
- Elevator Manufacturers Association of New York
- Gerson Lehrman Group Council (GLG)
- GRA, Inc.
- Lytx
- The Moak Group
- National Elevator Bargaining Assoc.
- Otis Elevator
- Pasadena Refining System, Inc. (PRSI)
- Seabury Group
- Thomson Reuters Expert Witness Services
- Univision Communications
- City of Beaumont, TX
- City of Eloy, AZ
- Amtrak
- CSX Corporation
- Keolis Commuter Services
- Keolis, North America
- Labor Relations Association of Passenger Railroads (LRAPR)
- Long Island Rail Road Company (LIRR)
- Metra
- Metro-North Commuter Railroad Company
- New Jersey Transit Rail Operations
- Northern Indiana Commuter Transportation District (NICTD)
- Port Authority Trans Hudson Corporation (PATH)
- Southeastern Pennsylvania Transportation Authority (SEPTA)
- Virginia Railway Express (VRE)
- Washington Metropolitan Area Transit Authority (WMATA)