How to Sell an Engineering Firm (2026): Multiples, Buyers, & AEC M&A Playbook
Quick Answer
Christoph Totter · Managing Partner, CT Acquisitions
Buy-side M&A across 76+ active capital partners · AEC M&A: engineering, architecture, environmental · Updated June 6, 2026
A US engineering firm in 2026 typically sells for roughly 5x to 13x EBITDA, with the multiple varying significantly by service-line mix, end-market exposure (especially infrastructure, environmental, transportation, water/wastewater), backlog quality, and platform scale. By profile: a single-office regional civil/structural firm at $1-3M EBITDA goes 5x-7x EBITDA; a small multi-office regional firm with diversified service lines ($3-8M EBITDA) goes 6x-9x EBITDA; a mid-size multi-state engineering platform ($8-25M EBITDA, multi-discipline including civil/transportation/water/environmental) goes 8x-11x; a premium scale platform ($25M+ EBITDA, multi-state, federal/state DOT contracts, IIJA-aligned infrastructure exposure, named federal MSA contracts) reaches 10x-13x+ EBITDA. Active buyers include Stantec (TSX: STN / NYSE: STN, $5B+ revenue Canadian-headquartered global AEC), Tetra Tech (NASDAQ: TTEK, $5B+ revenue, environmental and water focus), NV5 Global (NASDAQ: NVEE, ~$900M revenue, multi-discipline), Bowman Consulting Group (NASDAQ: BWMN, ~$400M revenue, geospatial/transportation), Ardurra Group (PE-backed, infrastructure engineering, ~$500M revenue), Verdantas (The Sterling Group, ~$300M revenue, environmental and water), Olsson (private, large Midwest civil), Kimley-Horn (private/ESOP, large national civil), GHD (Australian, US infrastructure), IMEG (PE-backed, MEP), Salas O’Brien (PE/ESOP), Carollo Engineers, Fehr & Peers, plus PE-backed regional consolidators (The Sterling Group, J.F. Lehman, Stonepeak Infrastructure Partners, AEA Investors, Wind Point Partners, Riverside Company, Pinnacle Partners). The biggest multiple drivers are end-market mix (infrastructure / water / environmental / transportation premium to commercial; IIJA / BIL exposure is a tailwind), backlog quality and visibility, federal/state MSA contracts, licensed PE bench depth across disciplines and states, multi-state professional licensure footprint, and recurring services-revenue percentage. Buyer-paid M&A advisory (CT Strategic Partners) costs the seller nothing.
If you own an engineering firm in 2026 — civil, transportation, water/wastewater, environmental, geotechnical, structural, MEP, or multi-discipline — the M&A market is highly active. Stantec, Tetra Tech, and NV5 Global are the largest public AEC consolidators. Bowman Consulting Group went public in 2021 and continues to acquire. PE-backed platforms like Ardurra (~$500M revenue), Verdantas (Sterling Group, ~$300M revenue), IMEG, and Salas O’Brien continue rolling up regional firms. The IIJA / Bipartisan Infrastructure Law has been a tailwind for infrastructure-aligned firms.
What the asset is worth depends on three things: (1) end-market mix (infrastructure / water / environmental / transportation premium to commercial), (2) backlog quality and visibility (named federal/state MSA contracts), and (3) licensed-PE bench depth across disciplines and multi-state professional licensure footprint. This guide covers real multiples by profile, the named buyers transacting, and the operator-level diligence buyers will run.
This guide is about engineering firms (civil, transportation, water/wastewater, environmental, structural, MEP). If you operate a full architecture firm or design-build practice, see our separate guide at how to sell an architecture firm.
What this guide covers
- Engineering firm multiples 2026: 5x-7x EBITDA for single-office regional, 6x-9x for small multi-office diversified, 8x-11x for mid-size multi-state platforms, 10x-13x+ for premium scale with IIJA/BIL infrastructure exposure and federal/state MSA contracts.
- Active buyers: Stantec (TSX: STN/NYSE: STN, $5B+), Tetra Tech (NASDAQ: TTEK, $5B+), NV5 Global (NASDAQ: NVEE, ~$900M), Bowman Consulting (NASDAQ: BWMN, ~$400M), Ardurra Group (PE-backed, ~$500M), Verdantas (Sterling Group, ~$300M), Olsson (private), Kimley-Horn (private/ESOP), GHD, IMEG (PE-backed), Salas O’Brien.
- PE sponsor activity: The Sterling Group (Verdantas), J.F. Lehman, Stonepeak Infrastructure Partners, AEA Investors, Wind Point Partners, Riverside Company, Pinnacle Partners, plus multiple infrastructure/environmental-services PE funds.
- Multiple drivers: infrastructure/water/environmental/transportation end-market exposure, IIJA/BIL alignment, backlog quality, federal/state MSA contracts, licensed-PE bench depth, multi-state licensure footprint, recurring services revenue.
- Things that compress the multiple: commercial-only end-market concentration, owner-PE dependence, single-client concentration above 20%, weak backlog visibility, single-state licensure, weak PE-bench succession.
- Sellers pay nothing on CT Strategic Partners’ buyer-paid advisory.
Named engineering firm M&A transactions (2021-2025)
CT Acquisitions · 2026 Buyer-Market Signal
What AEC Buyers Pay Premium For in 2026
Across our buy-side conversations with active AEC acquirers in 2026:
- Federal and infrastructure end-markets drive multi-turn premium. Operators with documented federal contracts (DOT, EPA, DOD) or infrastructure pipeline trade above pure commercial peers.
- Backlog quality (multi-year, take-or-pay) matters more than backlog scale. A $30M multi-year backlog beats a $50M one-year backlog at most buyer tables.
- Principal retention is the integration gate. Strong forward employment agreements with senior principals signed pre-LOI drive premium offers.
Multiple at a Glance · 2026
Engineering Firm Sale Multiples · 2026
By scale and end-market.
Source: CT Acquisitions analysis of AEC M&A. Stantec (STN), Tetra Tech (TTEK), NV5 (NVEE), Bowman (BWMN), Ardurra, Verdantas + 25+ PE-backed AEC platforms.
Related Cluster GuideAdjacent professional-services vertical: see how consulting business valuation works in 2026.
| Target | Buyer | Year | What it tells us |
|---|---|---|---|
| Bowman Consulting Group IPO | Public market (NASDAQ: BWMN) | 2021 | Recent AEC IPO established public-market multiples; continues aggressive tuck-in M&A. |
| Multiple Stantec tuck-ins | Stantec (TSX: STN / NYSE: STN) | 2022-2025 | Global AEC public continues geographic and capability tuck-in M&A. |
| Tetra Tech regional tuck-ins | Tetra Tech (NASDAQ: TTEK) | 2022-2025 | Environmental/water leader continues consolidation; IIJA/BIL tailwind helping. |
| NV5 Global continued M&A | NV5 Global (NASDAQ: NVEE) | 2022-2025 | Multi-discipline AEC public continues acquisitive growth. |
| Ardurra continued tuck-ins | PE-backed (multi-sponsor) | 2022-2025 | PE-backed infrastructure engineering platform continues regional rollups. |
| Verdantas growth via Sterling | The Sterling Group | 2022-2025 | PE-backed environmental/water consultancy continues regional rollups. |
The named buyer landscape
Public / strategic AEC buyers
- Stantec (TSX: STN / NYSE: STN, $5B+ revenue) — Canadian-headquartered global AEC consolidator.
- Tetra Tech (NASDAQ: TTEK, $5B+ revenue) — environmental and water specialty leader.
- NV5 Global (NASDAQ: NVEE, ~$900M revenue) — multi-discipline AEC.
- Bowman Consulting Group (NASDAQ: BWMN, ~$400M revenue) — geospatial / transportation / land development engineering. IPO 2021.
- WSP Global (TSX: WSP) — Canadian global AEC.
- AECOM (NYSE: ACM) — selective US M&A.
PE-backed national platforms
- Ardurra Group (PE-backed, ~$500M revenue) — infrastructure engineering.
- Verdantas (The Sterling Group, ~$300M revenue) — environmental and water.
- IMEG (PE-backed) — MEP engineering.
- Salas O’Brien (PE-backed/ESOP) — MEP and consulting.
- Carollo Engineers — water-focused.
- Multiple PE-backed regional platforms across the US.
Private / ESOP-owned national firms
- Kimley-Horn (private/ESOP) — large national civil engineering.
- Olsson (private) — Midwest civil engineering.
- GHD (Australian) — US infrastructure presence.
- Fehr & Peers, Burns & McDonnell (ESOP), HDR (ESOP) — private/ESOP firms not active acquirers in their model.
PE sponsors active in this space
- The Sterling Group (Verdantas), J.F. Lehman, Stonepeak Infrastructure Partners, AEA Investors, Wind Point Partners, Riverside Company, Pinnacle Partners, plus multiple infrastructure/environmental-services PE funds.
What each buyer will pay for vs. what they reject
- Will pay premium for: infrastructure / water / environmental / transportation end-market mix, IIJA / BIL alignment, named federal MSA contracts (DOT, DOE, EPA, USACE, USGS, Army Corps), state DOT MSAs, strong backlog visibility (12-18 months forward), licensed PE bench across disciplines and states, multi-state professional licensure footprint, recurring services revenue (compliance, monitoring, water/wastewater operations).
- Will compress or reject: commercial-only end-market concentration without infrastructure exposure, owner-PE dependence, single-client concentration above 20%, weak backlog visibility, single-state licensure footprint, weak succession bench, undocumented PE-licensing, project-cost-overrun history, professional liability claim history.
The operator-level KPI playbook buyers will diligence
End-market and service-line mix
- End-market mix: Transportation %, water/wastewater %, environmental %, building structural %, MEP %, geotechnical %, land development %, commercial %.
- Public vs. private client mix: Federal, state DOT, municipal, private commercial, private residential.
- IIJA/BIL-aligned revenue: Document infrastructure-bill-tailwind revenue exposure.
- Recurring vs. project revenue: Compliance, monitoring, water/wastewater operations contracts.
Backlog and pipeline
- Backlog: Documented in months or dollars; 12-18 months forward visibility is the platform benchmark.
- Win rate: RFP/RFQ win rate by client type.
- Pipeline: Pursued opportunities, weighted by probability.
- Customer concentration: No single client above 20%.
Federal/state MSA contracts
- Federal MSAs: GSA schedule, DOT, USACE, EPA, DOE, USGS, etc.
- State DOT contracts: By state, with task-order count and history.
- Set-aside qualifications: SDB, HUBZone, WOSB, VOSB, 8(a) status if applicable.
Professional licensure
- PE count by state: Documented; multi-state coverage is a multiple-builder.
- PE bench depth: Tenure, age distribution, succession plan.
- Specialty discipline licenses: SE (structural engineer), PG (professional geologist), CCM (certified construction manager).
Project and financial KPIs
- Utilization: Billable hours / available hours; 65-78% is healthy for AEC.
- Realization: Billed vs. budgeted hours by project.
- Net multiplier: Net revenue / direct labor cost; 3.0+ is healthy.
- Project margin: Track by project, by service line.
- Days in AR: <75 days is healthy for AEC (longer than typical services).
Risk and insurance
- Professional liability claim history: 5-year claim history; documented and resolved.
- Insurance coverage limits: PE&O coverage levels documented.
- Project risk-management protocols.
Dangers and traps in engineering firm M&A
1. Commercial-only end-market concentration
Premium multiples come from infrastructure / water / environmental / transportation. Commercial-only firms compress.
2. Owner-PE dependence
If the founder/principal PE is the rainmaker for top clients, build the BD and succession bench.
3. Single-client concentration
Above 20% single-client concentration is repriced.
4. Weak backlog visibility
12-18 months forward backlog visibility is the benchmark.
5. Single-state licensure
Multi-state PE licensure is a multiple-builder.
6. Professional liability claim history
Repeated claims raise project-risk-management questions.
7. Federal/state MSA contract loss risk
If a major MSA is up for renewal during the sale process, that creates uncertainty.
8. Equity-rollover expectations
PE-AEC deals often include 20-40% equity rollover for selling PEs/principals. Understand the dynamics before LOI.
Our POV on engineering firm M&A in 2026
- Single-office regional firms ($1-3M EBITDA) go 5x-7x.
- Small multi-office diversified firms ($3-8M EBITDA) go 6x-9x EBITDA.
- Mid-size multi-state platforms ($8-25M EBITDA) are highly leveraged. 8x-11x.
- Premium scale platforms ($25M+ EBITDA, multi-state, IIJA/BIL aligned, federal/state MSA contracts) reach 10x-13x+.
The right time to prepare is 12-18 months before going to market — build the federal/state MSA contract base, develop infrastructure/water/environmental specialty mix, document backlog and pipeline, expand multi-state PE licensure, and build the succession bench.
Preparing your engineering firm for sale: 12-18 months out
- Get multi-year audited or reviewed financials. Track revenue by service line, client type, contract.
- Build infrastructure / water / environmental specialty exposure.
- Lock in federal/state MSA contracts. Multi-year task-order base.
- Document backlog and pipeline. 12-18 months forward visibility.
- Expand multi-state PE licensure.
- Build the succession bench. Reduce founder/principal-PE dependence.
- Resolve professional liability matters.
- Document KPIs. Utilization, realization, net multiplier, project margin.
- Run a competitive process. Stantec, Tetra Tech, NV5, Bowman, Ardurra, Verdantas (Sterling), IMEG, Salas O’Brien, plus PE sponsors (Sterling, J.F. Lehman, Stonepeak, AEA, Wind Point, Riverside).
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Frequently asked questions
How do I sell an engineering firm?
To sell an engineering or AE firm, run a confidential process with strategic acquirers and PE-backed platforms consolidating the sector. Buyers weigh backlog, recurring client relationships, licensed and credentialed staff retention, project mix, and owner dependence. Engineering firms typically trade at 5x to 8x EBITDA, with diversified, backlog-rich firms and strong second-tier leadership at the high end.
What is the typical multiple for an engineering firm in 2026?
Single-office regional firms ($1-3M EBITDA) go 5x-7x EBITDA. Small multi-office diversified firms ($3-8M EBITDA) go 6x-9x. Mid-size multi-state platforms ($8-25M EBITDA) go 8x-11x. Premium scale platforms ($25M+ EBITDA, IIJA/BIL aligned, federal/state MSA contracts) reach 10x-13x+.
Who are the active buyers of engineering firms right now?
Public/strategic: Stantec (TSX: STN / NYSE: STN, $5B+ revenue), Tetra Tech (NASDAQ: TTEK, $5B+, environmental/water), NV5 Global (NASDAQ: NVEE, ~$900M), Bowman Consulting Group (NASDAQ: BWMN, ~$400M, IPO 2021), WSP Global (TSX: WSP), AECOM (NYSE: ACM). PE-backed: Ardurra Group (~$500M), Verdantas (Sterling Group, ~$300M, environmental/water), IMEG (MEP), Salas O’Brien (MEP). Private/ESOP: Kimley-Horn, Olsson. PE sponsors: The Sterling Group, J.F. Lehman, Stonepeak Infrastructure Partners, AEA Investors, Wind Point Partners, Riverside Company.
What hurts an engineering firm’s valuation most?
Commercial-only end-market concentration without infrastructure exposure, owner-PE dependence with weak succession bench, single-client concentration above 20%, weak backlog visibility, single-state professional licensure, repeated professional liability claims, project-cost-overrun history, and major federal/state MSA contracts up for renewal during sale process.
Why is IIJA / BIL infrastructure alignment so important?
The Infrastructure Investment and Jobs Act (IIJA, also known as the Bipartisan Infrastructure Law / BIL) drove significant infrastructure spending from 2022 onward. Engineering firms with named exposure to federal infrastructure programs (DOT, USACE, EPA, DOE) and state DOT MSAs capture material multi-year revenue uplift. Buyers price IIJA/BIL exposure into multiples.
What is the typical equity-rollover structure in engineering firm M&A?
PE-backed and strategic acquisitions of engineering firms often include 20-40% equity rollover for the selling principals / lead PEs. The rollover equity participates in the next platform exit, but understanding the rollover valuation, dilution dynamics, and second-sale terms is critical before signing an LOI.
Do I have to pay a broker fee?
No. CT Strategic Partners runs a buyer-paid M&A advisory model. The seller pays nothing. The buyer pays the success fee at closing.
How long does it take to sell an engineering firm?
Once you go to market with a buyer-paid advisor, a typical process runs 6-9 months from initial outreach to closing. Add 12-18 months of preparation work before going to market.
When should I start preparing if I plan to sell in 2027 or 2028?
12-18 months before going to market is the right window. Highest-leverage pre-sale work: build infrastructure / water / environmental specialty exposure, lock in federal/state MSA contracts, expand multi-state PE licensure, build succession bench, and document backlog/pipeline.
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About the Author
Christoph Totter is the founder of CT Acquisitions, a buy-side partner headquartered in Sheridan, Wyoming. We work directly with 76+ buyers, search funders, family offices, lower middle-market PE, and strategic consolidators, including direct mandates with the largest home services consolidators that other intermediaries can’t access. The buyers pay us when a deal closes, not the seller. No retainer, no exclusivity, no contract until close. Connect on LinkedIn · Get in touch