Yoh, A Day & Zimmermann Company
Mid-tier US IT and professional staffing firm owned by Day & Zimmermann.
On the record
Checkpoint: SIA 2027 Largest US IT Staffing Firms rankings, showing whether Yoh's rank improvement holds or reverses
The call
Yoh holds a stable niche inside a shrinking IT staffing market, backed by its parent and federal contracts, while giants and AI recruiting tools squeeze its margins from both sides.
Yoh finds workers and places them in temporary IT jobs for companies. Three problems are hitting it at once: much larger competitors like TEKsystems can move into Yoh's customers without any real barriers stopping them, software makers like Workday are building AI tools that do recruiting work directly inside their systems (so companies need fewer staffing firms), and the whole IT staffing industry shrank last year. Yoh's parent company keeps it alive and it still has good relationships with a few big defense and government customers, but it owns nothing that rivals cannot copy or that AI cannot automate. The key question is whether customers will quietly do more hiring themselves using AI tools in Workday and SAP over the next couple years, even if they stay happy with Yoh's service.
Why
01
AI pressure: AI recruiting tools and AI-native HR platforms (Workday, SAP SuccessFactors, UKG). AI now screens, sources, and matches candidates inside client HR systems, cutting the recruiting work Yoh used to bill for. Could AI do the core job? Yes, likely.
02
Bigger players: TEKsystems (Allegis Group) and Insight Global. TEKsystems and Insight Global run 10 to 40 times Yoh's revenue in the same IT staffing rooms, with nothing stopping them from bidding on Yoh's accounts. Could a giant copy it? Yes, easily.
03
What protects it. Parent Day & Zimmermann's balance sheet, federal/defense clearance work, and a 15 year top five MSP satisfaction ranking keep enterprise clients from walking away.
What would change this call
SIA's July 2027 IT staffing rankings show Yoh's position (#24 in 2026) rising, flat, or falling. Would show whether Yoh's recent 2-rank gain is a real trend or a one-year blip.
Revelio Labs headcount data for Yoh Services LLC in 2027 versus the ~2,457 figure reported for March 2026. Would confirm whether the 2023-2026 7% headcount decline is stabilizing or continuing.
Whether Yoh names a specific AI product or discloses a margin figure tied to CEO Comito's 'AI integration' pivot by 2027. Would show whether the AI strategy is a real initiative or remains a generic talking point.
Revelio Labs headcount data for Yoh Services LLC in 2027 versus the ~2,457 figure reported for March 2026. Would confirm whether the 2023-2026 7% headcount decline is stabilizing or continuing.
Whether Yoh names a specific AI product or discloses a margin figure tied to CEO Comito's 'AI integration' pivot by 2027. Would show whether the AI strategy is a real initiative or remains a generic talking point.
Key numbers
- #24 on SIA 2026 Largest IT Staffing Firms list
- US IT staffing revenue fell 4.4% year over year
- Yoh headcount down 7.2% since 2023, ~2,457 workers
Named risks
- Giant staffing firms like TEKsystems and Insight Global face no structural barrier to competing directly in Yoh's market segments.
- Core recruiting workflows such as resume screening and candidate matching are already mainstream AI use cases per SHRM 2025 data.
- US IT staffing industry revenue contracted 4.4 percent year over year in 2025, shrinking the addressable market.
- Yoh headcount declined about 7.2 percent from 2023 to March 2026, indicating sustained internal contraction.
- Parent Day & Zimmermann faces sustained reputational and protest risk tied to munitions manufacturing linked to Gaza through mid 2025.
Rivals, as read in July 2026
| Rival | Direction | Evidence |
|---|---|---|
| TEKsystems (Allegis Group) | losing to | $3.92B 2025 IT staffing revenue vs Yoh's #24 rank, roughly 10 to 40x Yoh's scale (2026-07-02) |
| Insight Global | losing to | $3.28B 2025 IT staffing revenue, far exceeding Yoh's mid tier position (2026-07-02) |
| Kforce | contesting | $1.22B 2025 revenue, still larger than Yoh but closer in category than the top two (2026-07-02) |
| Workday, SAP SuccessFactors, Oracle, UKG (AI native HCM platforms) | gaining on | Shipping AI native talent acquisition tools that could disintermediate MSP administrative value as of 2025 to 2026 |
Questions people ask
- Is Yoh profitable in 2026?
- Yoh is privately held under Day & Zimmermann and does not disclose financials publicly. Its SIA IT staffing rank rose from #26 to #24 between 2025 and 2026 (as of 2026-07-07), suggesting stable revenue, but no audited profit figures are available.
- Could AI replace Yoh's staffing business?
- AI already handles core recruiting tasks Yoh performs: SHRM found 51 percent of organizations use AI in recruiting in 2025, including 44 percent for resume screening. Yoh's MSP integration and 15 year client satisfaction streak through 2025 offer some insulation, but core matching work is exposed.
- Who owns Yoh?
- Yoh is a wholly owned operating unit of Day & Zimmermann, a Philadelphia based family conglomerate controlled by the Yoh family, with Harold L. Yoh III as Chairman and CEO. Day & Zimmermann's own materials describe it as a 2.4 billion dollar services company.
- Who is Yoh's biggest competitor?
- TEKsystems (Allegis Group) is Yoh's largest rival, generating 3.92 billion dollars in 2025 US IT staffing revenue versus Yoh's #24 ranked position on the same SIA list as of 2026-07-07, meaning TEKsystems operates at roughly 10 to 40 times Yoh's scale.
- Has Yoh had layoffs?
- No formal layoff announcement is on record, but Revelio Labs data shows Yoh Services LLC headcount fell from about 2,648 employees in 2023 to roughly 2,457 by March 2026, a 7.2 percent decline, consistent with gradual attrition or cost cutting rather than a single event.
- Is Yoh using AI internally?
- Yoh attributes its 2026 SIA ranking improvement, from #26 to #24 in IT staffing, to what it calls successful integration of AI and data driven tools (as of 2026-07-07). President John Comito, appointed January 2025, was explicitly tasked with driving AI integration, though no specific product or vendor has been named.
Timeline
- 2026-07-07Yoh ranks #24 on SIA 2026 Largest IT Staffing Firms list, up from #26 in 2025
- 2026-06-29Revelio Labs estimates Yoh headcount at about 2,457 employees worldwide
- 2026-06-10Parent Day & Zimmermann wins 2.3 billion dollar US Army Hawthorne Army Depot contract
- 2026-03-05Yoh President John Comito named to SIA 2026 Staffing 100 North America
- 2025-09-08Yoh named Major Contender in Everest Group 2025 PEAK Matrix for IT contingent talent and MSP
- 2025-07-24Yoh ranks #51 on SIA 2025 Largest Staffing Firms in the US list
- 2025-07-02Protesters arrested at Day & Zimmermann Philadelphia HQ over Gaza munitions ties
- 2025-05-07Yoh's MSP arm earns 15th consecutive top five Baker's Dozen customer satisfaction ranking
- 2025-01-08John Comito becomes Yoh President, tasked with AI integration and higher margin services
- 2018-03-01Yoh acquires GECO Deutschland, its most recent disclosed acquisition
Revision history
24 July 2026
First assessed. Losing its protection. The text above is fixed as of this date and is not edited afterwards.
In the same band
Sources
- Yoh Recognized by SIA as a 2026 Largest IT Staffing Firm (2026-07-07)
- Yoh's Inclusion on the 2025 Largest Staffing Firms List Marks a Milestone in Client-Centric Success (2025-07-24)
- Yoh Services Number of Employees 2026 (2026-06-29)
- Largest US IT staffing firms generate $27.4B in revenue (2026-07-02)
- Workforce Solutions
- wikipedia.org (Day & Zimmermann infobox) (2026-07-24)
- Yoh Appoints John Comito as President (2025-01-08)
- DZConneX Earns 15th Straight Placement (2025-05-07)
- Yoh Named Major Contender in Everest Group PEAK Matrix (2025-09-08)
- 2025 Talent Trends: AI in HR
- Yoh President John Comito Named to SIA 2026 Staffing 100 North America (2026-03-05)
- Workforce Solutions in Consulting, Staffing, and Enterprise