How FTSE 250 facilities leader Mitie filled 250 secure‑justice roles at £240 cost per hire and beat  MoJ diversity targets

Mitie
UK facilities management

Our impact

The results were nothing short of spectacular:
250+
Hired
£240
Cost per hire
£12
Cost per application
5000+
Applications
-45%
Time-to-hire

Mitie used Gaia’s AI-powered, cross-channel campaigns to hire 250+ secure-justice staff 45  percent faster, at just £240 per hire, while exceeding MoJ diversity targets.

Overview

Mitie, one of the UK’s largest facilities management companies, was awarded a Ministry of Justice contract to deliver key frontline roles across the secure justice system, including Prison Custody Officers and Managers. But success required more than filling roles. The MoJ’s commitment to inclusion demanded tangible DE&I progress, and the roles themselves required resilient, values-driven candidates in a challenging and often misunderstood sector.

To meet these goals, Mitie needed to reach and convert underrepresented candidates at scale, improve engagement and pass rates, and build a recruitment model that aligned with public sector values and commercial efficiency.

Gaia was brought in to lead talent attraction - helping Mitie source thousands of high-quality candidates through intelligent, inclusive campaigns.

About the Client

Mitie Group PLC is the UK’s leading facilities management and professional services company, employing over 64,000 people. This programme supported Mitie’s delivery of the MoJ contract through its Care & Custody division, responsible for recruiting staff into prisons and secure facilities.

The Challenge

Traditional channels were not meeting the MoJ’s expectations on:

  • Representation: With formal targets for ethnic minority and ex-Forces hires
  • Engagement: High candidate drop-off and poor attendance at assessment centres
  • Relevance: Job board traffic lacked awareness or motivation to work in secure justice roles

Mitie needed a new talent attraction approach that could:

  • Attract diverse, passive audiences outside the job board bubble
  • Deliver quality candidates who would show up, engage, and pass
  • Support public sector transparency and cost-efficiency

Gaia’s Role

Gaia delivered targeted, AI-powered talent attraction across 8 key channels, automatically picking the most effective mix for each audience:

  • Instagram
  • TikTok
  • Snapchat
  • X
  • Facebook
  • YouTube
  • Google
  • LinkedIn

GaiaAttract, our AI targeting engine, automatically selects and activates the right mix of channels based on what’s most effective for each audience using insights from thousands of similar campaigns.

Adverts were tailored by role and built around what mattered most to these candidates: pay, purpose, progression, and stability. Creatives was optimised to connect with each group on the platforms they use every day.

Behind the scenes, Gaia’s AI acts as a smart control layer across the entire campaign. Gaia doesn’t just place ads at scale, it learns what’s working, and dynamically shifts spend to the best-performing channels. Gaia also uses cross-channel retargeting to keep candidates engaged - meaning if someone interacts with an ad on TikTok, Gaia can follow up with the next advert on Instagram or YouTube.

Results

Diversity Targets Met. And Exceeded

🌍 More than half of OSG (Operational Support Grades) hires came from racially diverse backgrounds, which is over 2.5x the MoJ target.

Quality Insights

Gaia’s social campaigns didn’t just generate volume, they drove a step change in candidate quality, evidenced by downstream hiring data:

Candidates attracted through Gaia were more engaged, more likely to attend, and twice as likely to succeed through assessment.

Funnel Performance & Efficiency

Role-Level Diversity & Engagement Highlights

Operational Support Grades (OSG)

Prison Custody Officers (PCO)

Prison Custody Managers (PCM)

Strategic Outcome

Gaia’s campaign directly contributed to transforming Mitie’s approach to public sector hiring - delivering measurable outcomes in scale, cost, diversity, and quality:

  • 2.6x higher candidate quality based on pass rate, attendance, and offer conversion, proving that better targeting delivers better hires
  • 250+ hires filled across secure roles, with campaign influence tracked from top-of-funnel to offer
  • DE&I targets exceeded:
    • 55% racially diverse hires (vs. 20% target)
    • 9% ex-Forces (vs 2.5% target)
  • £240 cost per hire, up to 8x more efficient than traditional outsourced channels
  • 45% faster time-to-hire, keeping pace with operational demands
  • Repeatable, data-driven model for high-volume, regulated hiring, now applicable across justice, defence, logistics, and other complex sectors

Gaia didn’t just deliver more candidates – it delivered the right ones, at lower cost, faster, and in full alignment with diversity, governance, and compliance expectations.

Delivered in Collaboration

Assessment and interview stages were designed and delivered by Equitas, whose inclusive structure was instrumental to the success.

FAQ's

How did Mitie cut cost per hire to £240?

Mitie used Gaia to run AI-optimised, cross-channel ads that shifted spend to the best-performing platforms in real time, delivering hires up to eight times cheaper than traditional channels.

What diversity gains did the campaign achieve?

The campaign delivered 55 percent racially diverse hires for Operational Support Grades and nine percent ex-Forces representation, comfortably beating the Ministry of Justice targets of 20 percent and 2.5 percent.

How was candidate quality measured?

Assessment pass rates doubled to 40 percent and attendance rose to 82 percent, proving that candidates sourced via Gaia were more engaged and more likely to succeed through each hiring stage.

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