Leading interim service providers
These are the IIM’s “Leading Interim Service Providers” listed in four tiers from Platinum, through Gold, Silver and Bronze (16 Providers in each).
Based on over 40,000 individual votes, we offer this ranking as a credible list of excellence in interim service provision and commend it to professional interim managers and executives to use.
- The provider title links and logo boxes go to the Providers’ websites.
- Read the IIM’s: “Interim Management Survey 2020“
- Read more about how the survey is conducted.

17. Kingsley Search & Interim – (Previously: 17/18/19/21)
Senior level interim assignments exclusively within the fields of HR and Finance and work via referral and recommendation across a wide range of business sectors, predominantly in London and the South East.
18. Osprey Clarke – (Previously: 18/19/36/56)
Providing leaders in change and transformation. Functional specialists across a broad range of sectors and industries.
20. La Fosse Associates – (21/20/22/39)
Specialists in IT Recruitment at all levels and in all sectors.
22. Savannah– (Previously: 13/12/14/15)
Functions: All, Finance, IT, HR & Prog./Project Mgt; Industries: All, Financial Services, TMT, Transport/Travel, Service Industry; London, UK, Europe, Germany, France, Italy & Nordics.
24. Stanton House – (Previously 20/23/18/38)
Core disciplines in Finance, Change Management and Consulting.
25. Investigo Executive – (Previously: 23/22/23/16)
Across Commerce and Industry and Financial Services with a Business Change team specialising in Public Sector.
27. Gatenby Sanderson – (Previously: 25/24/7/4)
Senior interims in Health, Government, Voluntary, Education & Housing. Leeds, London, Birmingham.
28. Chilworth Partnership – (Previously: 31/40/52/78)
Focusing on Executive Search and Interim Management in the financial sector.
29. Green Park – (Previously: 14/9/11/11)
Financial Services, Retail, Commerce, Industry, TMT, Health, Life Sciences, Energy/Utilities, Transport, Central & Local Govt. General Mgt, HR, Project Mgt, Finance, IT, Procurement
31. Alpine Interim – (Previously: 37/36/40/48)
All disciplines in mainly central government, local government and health at the senior end of the market.
32. Macallam Interim – (Previously: 48/57/44/44)
Manufacturing, FM and Support Services, Professional Services, Industrial, Financial Services, Energy, Retail, Public Sector, Power and Utilities and Private Equity.