Leading interim service providers
These are the IIM’s “Leading Interim Service Providers” listed in four tiers from Platinum, through Gold, Silver and Bronze (18 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 service providers’ survey and guide 2017“
- Read more about how the survey is conducted.


19. Kingsley Search & Interim – (Previously: 21/13/16/15)
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.
21. Greenwell Gleeson – (Previously: 25/16/20/26)
Birmingham based accountancy & finance recruitment firm.
23. Investigo – (Previously: 16/20/34/31)
Across Commerce and Industry and Financial Services with a Business Change team specialising in Public Sector.
24. Alium Partners – (Previously: 12/10/8/8/6)
Sectors: Public & Private; Functions: Finance, HR, IT, Operations, Business Transformation, Supply Chain, Procurement; industries: All industries; Location: UK & International.
26. Langley Search & Selection – (Previously: 34/35/21/17).
Procurement and Supply Chain specialists with Executive Interim arm. Covers UK and international.
27. Morgan Hunt – (Previously: 24/38/43/54)
Public sector recruiters across a range of disciplines and sectors.
29. Executives Online – (Previous: 17/12/12/13)
All sectors. London & Nationwide. Manufacturing, Business & Financial Services, Health/Pharma, Media, Construction, Retail, IT/Telecoms, Transport, Third sector.
31. Hoggett Bowers – (Previously: 30/32/32/27)
Executive, Project Mgt and Turnaround. London, Manchester & Nationwide.
32. Marble Hill Partners – (Previously: 32/30/29/22)
Private Equity backed businesses across all sectors, including: Business & Financial Services, Consumer, TMT, Healthcare & Education, Industrial.
35. Ameo – (Previously: 57/63-new)
Specialising in business change management and transformation programmes.
36. Osprey Clarke – (Previously: 56/64-new)
Providing leaders in change and transformation. Functional specialists across a broad range of sectors and industries.