List of former consulting firms

This is a list of notable former consulting firms.

Former design and engineering consulting firms

 * Birdsall Services Group
 * Hyder Consulting
 * Merz & McLellan
 * Parkman Group
 * Sinclair Knight Merz

Former industrial design firms

 * Lunar Design

Former digital and IT consulting firms

 * American Management Systems
 * Cambridge Technology Partners
 * American Management Systems
 * Computer Sciences Corporation
 * Covansys Corporation
 * Diamond Management & Technology Consultants
 * Hitachi Consulting
 * Logica
 * MarchFirst
 * Mahindra Satyam
 * Perot Systems
 * Razorfish
 * Sapient Consulting
 * SapientNitro
 * SapientRazorfish
 * Scient
 * USWeb
 * Viant
 * Whittman-Hart

Former cyber security consulting firms

 * Mandiant

Former economics consulting firms

 * Data Resources Inc.
 * Wharton Econometric Forecasting Associates

Former human resource consulting firms

 * Towers Perrin
 * Watson Wyatt Worldwide

Former management consulting firms

 * Andersen Consulting
 * Arthur Andersen
 * Mercer Management Consulting
 * Monitor
 * Navigant Consulting
 * Sweett Group

Former political consulting firms

 * Cambridge Analytica

Former research and analysis firms

 * Business International Corporation
 * CNW Marketing Research
 * Compete.com
 * Data Resources Inc.
 * EcoWin
 * Global Business Network
 * Micropal
 * Research International
 * Wharton Econometric Forecasting Associates
 * Yankee Group

Former risk management consulting firms

 * Towers Watson