List of 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

  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

  List of former consulting firms