LMM engineering services — the 2026 exit window is open

Three signals in the last fifteen months point at the same thing: lower-middle-market civil and environmental engineering platforms held by LMM PE are running an exit-prep tempo, and the buyer side is staffed for it.

The three signals

1. Ardurra Group (Littlejohn, 3.3-year hold). Five add-ons in the trailing nine months ending March 2026 — Remington & Vernick, MKN, Perteet, J.R. Wauford, Janus Research. That cadence is dressing-the-asset, not platform-building. Same Littlejohn played the pattern on HydroChemPSC before the $1.25B sale to Clean Harbors in 2024.
2. Verdantas (Sterling Investment Partners, ~2-year hold). Roll-up underway. The firm appointed a dedicated Chief Corporate Development Officer (Matt Henley) and a new CFO (Mark Hardaway) in 2025 — the leadership build characteristic of a sponsor preparing a platform for the next ownership transition rather than a routine operating period.
3. NV5 Global (NASDAQ: NVEE) — buyer-side leadership turnover. Ben Heraud appointed CEO January 2025, replacing founder Dickerson Wright (now Chairman). Wendy Cashin sits as CFO. New CEO + sustained M&A budget = a buyer staffed for a major acquisition decision in 2026.

Why this matters for LPs

LPs holding GP commitments to Sterling Fund IV, Littlejohn Fund VI, or vintage 2018–2020 LMM business-services funds carry exposure to the engineering-services sub-sector. The 2026 window is the realization window. Three observations to track:

• Hold-period clustering. Sterling's Verdantas (~2 yrs) is earlier than Littlejohn's Ardurra (~3.3 yrs), but both sit inside the 3–7 yr LMM exit band. Industry medians per Bain Global Private Equity Report place LMM realizations in the 4–6 yr range; both platforms are tracking toward the early end. (Bain Global PE Report)
• Comparable-print density. Three large environmental/industrial-services LMM-PE-to-strategic prints in the trailing 24 months: HydroChemPSC ($1.25B, 2024, Littlejohn → Clean Harbors), HEPACO ($400M, Feb 2024, Gryphon → Clean Harbors), DCI (~$130M, Q4 2025 → Clean Harbors). Pattern, not one-off — and Clean Harbors specifically is buying.
• Buyer-side dry powder. NV5, Bowman Consulting, and Stantec are the three publicly-traded strategics pricing off engineering-services exits. AECOM occasionally picks up specialty civil platforms. Verdantas itself functions as the sponsor-to-sponsor floor on civil-engineering platforms — Sterling's piece would compete directly with Ardurra in any auction process.

Buyer-side personnel — the corp-dev names to track

These are the humans who would price an Ardurra or Verdantas process. Tracking corp-dev seat changes at the strategics is the leading indicator of acquisition appetite ahead of any process going live:

• NV5 Global — Ben Heraud (CEO, Jan 2025), Wendy Cashin (CFO), Dickerson Wright (Chairman, founder)
• Verdantas — Matt Henley (Chief Corporate Development Officer), Mark Hardaway (CFO, 2025)
• Bowman Consulting — corp-dev seat to be confirmed via 10-K filings
• Stantec — Canadian-listed, runs M&A through Toronto and Edmonton offices
• AECOM — institutional buyer of specialty civil platforms

A new VP Corporate Development hire at NV5, Bowman, or Stantec — each of whom would be staffing for an Ardurra-sized or Verdantas-sized acquisition — is the next forward-looking signal to watch.

Key comparable transactions

| Date | Seller | Buyer | Sponsor exiting | Size | |---|---|---|---|---| | 2024 | HydroChemPSC | Clean Harbors | Littlejohn | $1.25B | | Feb 2024 | HEPACO | Clean Harbors | Gryphon Investors | $400M | | Q4 2025 | DCI | Clean Harbors | n/a | ~$130M |

Three sponsor-backed industrial-services platforms cleared at strategic-buyer multiples in a 24-month window. The pattern is a tightly-defined sector preference at Clean Harbors. The civil/environmental engineering equivalent — Ardurra or Verdantas to NV5/Bowman/Stantec — is the next iteration of the same cycle.

What to watch next

A sell-side mandate appearing on either Ardurra (Littlejohn) or Verdantas (Sterling) — Houlihan Lokey, William Blair, Harris Williams, or Lincoln International are the four boutiques most likely to win an LMM engineering-services mandate of this size. Auction-launch in Q3–Q4 2026 with announced close in 2027 is the base case if either sponsor is running the timeline implied by current activity.