Staffing Firm Lists & Market Share

The 2011 Book of Lists: A complete collection of staffing firm rankings and lists

August 11, 2011

  • Compilation of all 26 SIA annual lists in one sortable Excel workbook
  • Ranks hundreds of staffing firms' staffing revenue domestically, globally, and by staffing sector
  • Opportunity lists: fastest-growing, diversity, mentors/proteges, acquirers

2011 List of Largest U.S. Staffing Firms

August 3, 2011

  • Lists 98 companies with at least $100M in U.S. staffing revenue
  • Top three: Allegis Group, Adecco, ManpowerGroup
  • Companies cumulatively represent 53% of U.S. staffing market

2011 List of Largest Global Staffing Firms

August 3, 2011

  • Lists 86 companies with at least $300M in global staffing revenue
  • Top three: Adecco, ManpowerGroup, Randstad Holding
  • Companies cumulatively represent $150B of global staffing market

2011 List of Largest Global IT Services Firms

August 3, 2011

  • Lists 27 companies with at least $300M in global IT services revenue
  • Top three: Capgemini, Infosys Technologies, TATA Consultancy Services
  • Companies cumulatively represent $47B of global IT services market

2011 List of Largest Global Engineering Services Firms

August 3, 2011

  • Lists 10 companies with at least $300M in global engineering services revenue
  • Top three: Adecco, Aerotek (Allegis), Brunel
  • Companies cumulatively represent almost $6 billion of global engineering services market

2011 List of Diversity Staffing Firms

July 27, 2011

  • Lists 118 diversity-owned staffing firms
  • Diversity defined as woman- and-minority owned, service-disabled veterans, HUBZones among others

2011 List of Largest U.S. Engineering Staffing Firms

July 27, 2011

  • Lists 17 companies with at least $50M in U.S. engineering staffing revenue
  • Top two: Aerotek (Allegis), Adecco
  • Companies cumulatively represent 64% of U.S. engineering staffing market

2011 List of Largest U.S. Outplacement Firms

July 26, 2011

  • Lists three companies with at least $50M in U.S. outplacement revenue
  • Top company: Right Management (ManpowerGroup)
  • Companies cumulatively represent 58% of U.S. outplacement market

2011 List of Largest U.S. Retained Search Firms

July 26, 2011

  • Lists seven companies with at least $25M in U.S. retained search revenue
  • Top three companies: Korn/Ferry, Heidrick & Struggles, Russell Reynolds Associates
  • Companies cumulatively represent 21% of U.S. retained search market

2011 List of Largest U.S. Providers of Direct Hire

July 26, 2011

  • Lists seven companies with at least $25M in U.S. direct hire revenue
  • Top company: Robert Half International
  • Companies cumulatively represent 10% of U.S. direct hire market