The missing middle: Why interim talent is the vital layer between hiring and consulting in the UK

A flexible layer between permanent hiring and consulting

Across sectors, leadership teams are rethinking how they access the skills and capacity needed to deliver growth and resilience in an environment defined by volatility, cost pressures, and rapid shifts in demand. Amid this uncertainty, organizations have an understandable reluctance to grow headcount. UK labor market data shows that hiring intentions have fallen to their lowest levels since 2014, excluding the pandemic period, and a recent Deloitte report highlights delayed workforce expansion globally. 

Interim talent offers a practical solution that enables organizations to bring in experienced leaders and specialists who can seamlessly integrate into critical initiatives, providing flexibility that neither permanent hires nor traditional consulting arrangements can match.    

The limitations of relying solely on traditional hiring in today’s conditions  

Of course, many organizations are still planning to add headcount, albeit more selectively. Leaders report persistent challenges in finding candidates with the right mix of technical skills and change experience. According to the World Economic Forum, 63% of employers say skills gaps in the labor market are now the single biggest barrier to business transformation. In consumer sectors, these pressures are particularly urgent. McKinsey estimates that by 2035, technology could reshape up to 55% of workers’ current activities, creating acute near-term skills shortages for many roles.  

That combination of cautious headcount growth and hard-to-fill roles creates a structural execution gap. Companies know what they need but cannot always mobilize the right people in the right roles at the right time. Interim hires are often ideal for time-boxed transformations with hard deadlines, post-deal integrations, and when organizations need immediate continuity during CEO or CFO transitions. 

Permanent hiring remains essential for core leadership roles and long-term capability building, but as a default solution for every capability gap, it has its limitations. Three constraints consistently emerge in our conversations with clients:

• It can be too slow for urgent work. Senior permanent searches can take longer than expected from brief to start date, especially in tight talent markets. For time-bound initiatives, that delay can mean missed windows and stalled momentum.
• It is often a blunt tool for finite problems. Many of today’s priorities are project based and do not justify a permanent role once the work is complete. Designing a job around a single transformation risks leaving an organization with a misshapen role and unnecessary costs after project concludes.
• It locks in fixed costs in a volatile world. With macro conditions constantly changing, leaders are hesitant to make commitments that are difficult to unwind. Many of our clients say they don’t really know what their permanent headcount should look like 12–18 months from now, even as they face short-term delivery pressure.

These challenges are pushing leadership teams to look for more nuanced ways to add targeted capacity without making premature long term commitments. We’re seeing this reflected in the market: Heidrick and Struggles’ 2026 High-End Independent Talent Report shows that demand for interim leaders has surged by 151% in the past five years across European and US markets.

The trade-offs of relying on consulting alone

Consulting, meanwhile, remains a powerful tool, particularly for strategy and complex problem solving that may benefit from external perspectives. Consulting firms can mobilize multidisciplinary teams quickly and help leadership teams reframe issues and reassess options.

However, an over-reliance on consulting brings its own set of trade-offs. Leaders we speak to often highlight three downsides:

• Cost and resourcing model. Consulting projects typically come with a full team and a premium fee. That can be appropriate for one-off strategic work, but is harder to justify for ongoing, implementation-heavy programs where much of the capability already exists in-house.
• Limited integration. Consultants typically operate alongside—but not fully within—the organization’s day to day. This distance can make it harder to navigate informal decision-making and to fully account for the internal factors that determine whether changes stick.
• A bias toward recommendations over execution. Consulting engagements often end with tools, reports, and recommendations that internal teams must implement. This disconnect between insight and execution is where many transformations lose momentum.

Interim talent operates in the middle ground, bringing in leaders and specialists who can be embedded within the organization and work alongside teams, staying long enough to deliver tangible results. This makes it a more cost-effective option for work that requires hands-on implementation. It is particularly effective when the strategy is already clear, and the real gap is ownership of delivery and change execution.

Enabling effective interim collaboration

Working effectively with interim talent requires structured collaboration, and success often depends as much on how the organization enables them as on the individual’s own capability. The following best practices, based on what we’ve seen across our client work, can help ensure a productive, seamless engagement:

• Align early on scope and goals. Establish an early alignment on objectives, success criteria, and decision rights. Designating an internal point person who can provide timely approvals can help avoid bottlenecks.
• Enable access and integration. Equip the interim leader with access to key tools, data, and stakeholders before Day One. Map the organizational landscape early and introduce the leader’s role and priorities to core collaborators to accelerate trust and context building.
• Maintain structure and plan transitions. Hold regular check-ins to review progress, surface dependencies, and refine scope. When a permanent hire is pending, create overlap and ensure knowledge transfer to preserve momentum.

Engaging interim talent works best when positioned as a deliberate “missing middle,” bridging the gap between slower, high-commitment permanent hiring and higher-cost consulting that often stops short of execution. By clearly defining outcomes and integrating experienced, delivery-focused talent, organizations can add targeted capability at speed while maintaining the flexibility needed to navigate ongoing uncertainty.