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Leading Interim Service Providers

These are the IIM’s “Leading Interim Service Providers for 2023” listed in four tiers from Platinum, through Gold, Silver and Bronze (16 Providers in each).
Based on around 30,000 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

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Service Providers
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(Previously: 2/3/3/3)
New Street Consulting Group is one of the UK’s leading Interim management providers - but don’t just take our word for it. We’ve been listed as a Platinum Provider by the Institute of Interim Management every year for years.

Our award-winning services leverage our extensive expertise, strong sector knowledge and our unrivalled community of Interim leaders.

Over recent years we’ve expanded our services to offer a wider range of talent and leadership consulting solutions to help clients find, assess, build, and accelerate teams and leaders who are as good in practice as they are on paper.
Eton Bridge NEW
(Previously: 1/1/2/1)
Eton Bridge Partners is a leading Executive Search, Interim Management and Consulting firm with a strong reputation for building relationships and delivering excellence for our clients in over 35 countries around the world.

We have a long-standing track record of acting as trusted partner to a wide range of clients from ambitious SMEs to PE-backed portfolio companies and global blue-chip organisations.

Our specialist practices cover the breadth of corporate leadership:
- Board
- Finance
- Human Resources
- Business Transformation
- Digital & Technology
- Operations, Procurement & Supply Chain
- Sales & Marketing
- Legal, Risk & Compliance
New TileHill
(Previously: 3/7/14/30)
Tile Hill provides Interim Management and Executive Search to help our customers cope with business challenges and deliver change more effectively. Our growing community of Interim Managers offers a huge range of skills and experience to public sector clients right across the UK and we’re proud to be recognised as an Institute of Interim Management Platinum Provider. When working with us, you can expect to deal with people who approach their work with energy and positivity and who strive to have the best possible impact on your career.
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(Previously: 4/2/1/2)
Banking & Financial Services, Central Govt, Construction, Engineering, Health, Insurance, Local Govt., Pharma, Prog./Project Mgt. HR, Finance, IT, Operations & Business Analysis.
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(Previously: 7/4/4/4)
Established in 2001, and with 100 staff based across Europe and North America, Wilton & Bain provide Executive Search, Interim Management, Specialist Hires and Leadership Advisory services to businesses going through transformation and change.

Wilton & Bain Interim Management provide the senior expertise that businesses need now to deliver against their strategic vision. Our approach means we first understand the specific client needs. We then use our extensive network to provide exactly the right senior talent to deliver positive change that lasts long after our teams leave the business.
IIM Affiliates
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(Previously: 11/16/30/45)
Anderson Quigley (AQ) are a specialist executive search, Interim management and advisory consultancy, supporting organisations that focus on society and social development. We are driven by our core values – integrity, diversity and hands-on project ownership, using our decades of knowledge and expertise to deliver leadership recruitment in education, healthcare, charities and government. Our highly experienced team are dedicated to exceptional candidate and client care with a real enthusiasm for their respective sectors. AQ is a forward thinking, values-led and collaborative business proudly serving the public sector. We support people and organisations to build better leaders for a better society.
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(Previously: 5/5/9/16)
Holdsway helps leaders and their organisations accelerate change across Europe. Established over a decade, we offer rapid access to a comprehensive network of constantly benchmarked interim executives. Each interim has years of career experience delivering change, managing leader transition, turnaround, or growth. Known for our agile and personalised service – businesses know experienced help is at hand – fast. As economies become increasingly volatile, we believe interim executives are a positive influence and great catalysts of change. They have chosen to benefit others with experience of change leadership. Our network encompasses highly experienced and effective interims - we call them ‘expert game-changers’.
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(Previously: 15/13/13/12)
Boyden UK offers clients bespoke integrated leadership and talent solutions. Working with clients ranging from SMEs through to FTSE 100 companies, we work across all sectors and functions sourcing only the highest calibre Interim Management professionals on the market with speed and efficiency.
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(Previously: 6/9/6/6)
In an uncertain climate, Interim support can give your organisation flexibility and an invaluable injection of expertise. Interims provide the continuity, support and leadership needed to assess next steps, shape strategies and create clear direction for the long term.

Solace in Business has been providing Interim Managers, across all corporate and front-facing services, to the Public Sector for over 20 years. We specialise in providing Interim Heads of Service, Directors and Chief Executives to local authorities and other related organisations. We also provide consultants/Interims to carry out short-term project work, reviews and investigations.
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(Previously: 12/8/11/7)
All sectors & functions; Media, IT/ Telecoms, Utilities / Energy, Prof. Services, Financial Services, Transportation, Engineering, Construction, Retail, FMCG, Health, All Govt.; UK/Int.
New Finatal
(Previously: 20/50/51/60)
Finatal is the search partner of choice to Private Equity Funds and their Portfolio companies. We have had sensational success working with private equity investors, their portfolio companies or privately owned businesses looking to exit, to provide the best quality talent.

Our team are experts at identifying candidates that thrive in a fast-paced, change-driven environment that is the natural mindset of PE. Finatal’s Interim Management practice covers a range of assignments from Interim CFO, FP&A and FC through to value creation, transformation and M&A.
IIM Affiliates
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(Previously: 24/21/27/25)
GatenbySanderson is the UK’s leading people advisory firm across public services, not for profit and education. Working within complex, challenging and highly scrutinised environments we deliver interim leadership, executive search and leadership development consultancy.
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La Fosse is a total talent solution business, encompassing executive search, recruitment, resource augmentation, and tech skills training. Our unique combination of specialist expertise, high-growth experience, and an international network means we’re uniquely positioned to support our customers with their specific business needs from the classroom to the boardroom. La Fosse Executive specialises in recruiting leaders for companies going through high growth and transformation journeys. Our flexible approach ensures we can match our customers’ pace at every stage, from investment to growth and through to exit.
IIM Affiliates
New Investigo
(Previously: 19/24/25/23)
Senior Interims into Finance, Business Change and Transformation, Procurement, Real Estate, Facilities and Workplace and Technology.
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(Previously 21/23/24/20)
Stanton House is one of the UK’s leading Interim Management providers.

We deliver Interim recruitment solutions within Finance and Transformation and have an intense focus on developing relationships built on trust.
We’ve won multiple awards for our offering - including recognition from the IIM as a ‘Platinum Service Provider’.

Our customers range from exciting start-ups to the world’s largest organisations. We’re creative in how we add value to our customers, building long-term relationships with clients and candidates alike.
Our commitment to our values differentiates Stanton House from the competition and creating exceptional customer experiences is central to all that we do.
IIM Affiliates
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(Previously: 9/6/5/15)
Specialist Interim healthcare recruitment business which also covers all other disciplines.