Capital Decisions: Your Firm Has Options. So Do the People Who Work For You.

In a consolidating AEC market, the capital decision you make — and when you make it — determines outcomes for more than your balance sheet. The data on team outcomes is worth knowing before a banker calls.

The AEC founders who navigate this market well share one quality: they made a deliberate capital strategy decision before the external pressure arrived. The ones who struggle made the same decision reactively, on someone else's timeline.

Private equity now drives 40% of all AEC M&A transactions and that figure is not declining. But the prevalence of PE in this market does not mean PE is right for your firm, or that it is the only option worth understanding. What it means is that the capital strategy decision — once a background consideration for mid-market founders — has become a foreground strategic question. Avoiding it is itself a decision, and usually not the best one.

This piece is not a case for PE. It is a framework for thinking clearly about the full range of capital options available to mature, profitable AEC firms — what each structure actually delivers for growth aspirations, what it costs, and who bears that cost. Including the people involved; employees and clients counting on you to think about them.

47%

Average employee turnover within the first year following an acquisition

EY M&A Integration Research

80%

Average AEC client retention rate — repeat clients are 5× more profitable than new ones

PSMJ / ClearlyRated AEC Benchmarks

35%

Higher value per employee at ESOP-owned AEC firms vs. non-ESOP peers

Zweig Group Valuation Survey, 2021

What's Actually Happening in the AEC Market

Three forces are simultaneously reshaping the ownership landscape for mid-market AEC firms, and understanding all three is necessary to make a clear-headed capital decision.

The consolidation wave is real and accelerating. PE firms acquired more than 400 AEC companies annually for each of the past three years — twice the rate of a decade ago (Greyling, 2024). New PE platform formations within AEC grew 33% year-over-year in 2024 (Capstone Partners). The Infrastructure Investment and Jobs Act and Inflation Reduction Act are injecting over $580 billion into AEC-related spending through 2026, making the sector one of the most attractive in the middle market for yield-seeking capital. This is not a cycle. It is a structural re-organisation of how AEC firms are owned.

The talent market makes standing still expensive. The AEC industry is in a persistent and worsening talent shortage. IIJA implementation alone is projected to create over 82,000 engineering jobs against a labour market that already has hundreds of thousands of vacancies (Vector Solutions / ABC). In this environment, larger firms with PE-backed scale are competing for the same senior engineers and project managers your firm depends on — and they are offering equity participation, accelerated career tracks and benefits infrastructure that founder-led independents often cannot match without intentional capital investment.

Succession is the forcing function most founders underestimate. FMI Corporation and CFMA's 2024 study of nearly 300 AEC leaders found that half of all owners planning to exit within three to five years have no transition plan in place. That gap is precisely what attracts PE interest. A founder without a succession plan and significant illiquid equity is not a negotiating adversary to a financial buyer — they are a motivated seller in the making. The firms getting the best outcomes began their capital strategy work three to five years before any formal process.

Too often, owners rely on a buyer coming to the table. But passively waiting isn't a strategy — it's a timeline someone else controls.

Matt Godwin, Managing Director - FMI Finacial Advisory Services

The Employee Outcome Problem No One Puts in the Deck

Investment bankers will show you EBITDA multiples, transaction structures and comparable deals. What they will not show you is the post-acquisition employee turnover data — because it is consistently bad, and it is the single most important variable in whether any capital transaction delivers what the founder hoped it would for the people who built the firm with them.

According to EY's M&A integration research, average employee turnover after an acquisition reaches 47% within the first year and 75% within three years. In AEC, these numbers are not abstract. When a senior civil engineer leaves, she takes with her: the pre-qualification status at three state DOTs she built over eight years, the institutional knowledge of how a particular Corps district likes to receive deliverables, and the client relationships that were partially responsible for the multiple your firm commanded in the first place. The McKinsey research on M&A integration is unequivocal — loss of key leaders is the primary mechanism through which acquisition value is destroyed post-close.

The causes are well-documented. Research summarised by the AEC and HR communities consistently finds that culture misalignment drives approximately 30% of post-acquisition departures, followed by role ambiguity, poor internal communication and compensation structure changes. What founders consistently underestimate is how rapidly this dynamic unfolds — in most acquisitions, the talent decisions that determine integration success or failure are made in the first 90 days, typically before the integration team has even completed its plan.

WHAT THE OUTCOME DATA SHOWS BY STRUCTURE

HIGHER EMPLOYEE DISRUPTION RISK

• Immediate role uncertainty on announcement; key staff receive competitor calls within days

• PE cost reduction mandates often remove the management layer density that retains mid-level talent

• Standard PE integration playbooks from other sectors misapplied to AEC's licensure, project culture and client relationship model

• PE's 4–7 year exit horizon creates a "second disruption" when the platform is subsequently sold — most employees face two ownership changes in a decade

• Larger AEC firms (PE-backed) are already twice as likely as firms under 250 employees to report rising turnover (ActionsProve / EMI, 2024)

EY M&A Research · McKinsey M&A Integration · ActionsProve/EMI Future of Work in AEC 2024 · Greyling · BPE Search 2025

LOWER EMPLOYEE DISRUPTION RISK

• ESOP employees become shareholders — acquired staff join an ownership structure rather than losing one, removing the primary departure trigger

• NCEO meta-analysis (102 studies, 56,984 firms) finds ESOP firms significantly outperform non-ESOPs on employee retention and firm performance

• Family office and minority PE capital with longer hold periods (7–10 years) dramatically reduces second-disruption risk

• MBO and internal succession structures preserve role clarity — no announcement shock, no integration plan ambiguity

• Zweig Group 2021: ESOP AEC firms show 35% higher value per employee and 90% higher EBITDA multiples vs. non-ESOP peers — retention drives valuation

NCEO Research · Zweig Group Valuation Survey 2021 · BDO ESOP Report 2025 · UBS Family Office Survey 2024

Client Continuity: The Asset You Cannot Recover Once It Leaves

The AEC client relationship has structural characteristics that make it fundamentally different from client relationships in most sectors that PE firms routinely acquire. In accounting, consulting or technology services, a client relationship can survive a change in account management team. In AEC, it often cannot.

Agency pre-qualifications, IDIQ/on-call contract positions, trust built across permitting cycles and project delivery failures and successes — these are personal. They live with the project manager who has worked with the agency's project officer for six years, not with the firm name on the letterhead. When that project manager leaves following an acquisition, the pre-qualification position does not automatically transfer. In many cases it lapses, and rebuilding it takes years of deliberate relationship investment.

The data on AEC client retention is both instructive and sobering. Industry benchmarks put average AEC client retention at approximately 80% annually (PSMJ / ClearlyRated). Repeat clients are five times more profitable than new ones, and the cost of acquiring a new engineering client averages $1,780 — before accounting for the opportunity cost of the pre-qualification work, proposal investment and first-project risk associated with new relationships. Any capital structure that introduces material talent disruption is simultaneously introducing material client disruption — and most PE integration models do not explicitly price this risk.

The firms that protect client continuity through transitions share a common discipline: they have structured client relationships to be institutional rather than personal before any capital event. Documented relationship maps, secondary relationship holders assigned to every key account, agency contact records maintained in CRM independent of individual PMs. This is not just good PE preparation — it is the fundamental client retention infrastructure that makes any ownership transition survivable.

The Clock Problem: What a 6-Year Hold Period Actually Means

6 yrs

Median hold period for U.S. PE-backed companies in 2025 — the highest in 14 years

The median hold time for exited U.S. PE companies peaked at seven years in 2023 and has eased to six years in 2025, compared to a pre-pandemic average of 5.2 years. For assets still in PE portfolios today, median hold time stands at 3.8 years — meaning many platforms are approaching exit, not beginning. (Cherry Bekaert / Pitchbook, 2025)

The PE hold period concern founders raise is legitimate — and the data confirms it has gotten more acute, not less, in the current rate environment. A six-year median hold period means that, from the moment of acquisition, the clock begins on a strategic process that culminates in a second ownership change: the PE exit. For founders who care about firm continuity, this is not an abstract worry. It is a contractual reality embedded in the structure of every traditional PE investment.

But three important nuances belong in this analysis. First, hold periods are lengthening. The PE industry currently holds 12,552 backed companies representing nearly nine years of exit inventory at recent exit pace (Cherry Bekaert, Q2 2025). This means many PE firms are extending holds well beyond their target horizon — which, depending on how the relationship is structured, can actually work in a founder's favour. Second, there is significant structural variation in hold period by capital type. Family office direct investments routinely hold for 7–10 years or longer. Minority PE and growth equity investors have fundamentally different exit dynamics than majority buyout sponsors.

Third — and most importantly — the hold period concern is most severe in full majority buyout structures. In minority PE, management buyout and ESOP structures, the founder retains meaningful governance control over the timeline. The question is not "how do I avoid PE's clock?" but rather "which structure gives me the capital I need while preserving the timeline control I value?"

Five Structures, Honestly Compared

The right capital structure depends entirely on what you are trying to achieve — for your balance sheet, your employees and your clients. Here is what the evidence says about each option.

STRUCTURE	FOUNDER LIQUIDITY	HOLD/EXIT TIMELINE	EMPLOYEECONTINUITY	CLIENT CONTINUITY	BEST FOR
PE Majority Buyout	High (immediate)	4–7 years; buyer-driven	Highest disruption risk	Variable; depends on integration quality	Founders seeking full or majority exit with no internal succession bench
PE Minority / Growth Equity	Moderate (partial)	5–8 years; shared governance	Moderate; depends on sponsor	Better — founder still leads key accounts	Fast-growing firms wanting capital without full exit; founder stays operational
Family Office Direct	Moderate–high	7–10+ years; long-horizon by design	Lower disruption; aligns incentives	Good; less integration pressure	Founders wanting patient capital, governance support without aggressive exit agenda
Management Buyout (MBO)	Moderate (structured)	Founder-controlled; phased	High — internal team, known culture	High — minimal client disruption	Firms with strong 2nd-tier leadership ready for ownership; founder values legacy
ESOP	Phased (structured); significant tax advantage	Founder-controlled; indefinite ownership continuity	Highest continuity; employees become owners	Highest — no external sale, no disruption event	Founders committed to employee culture, legacy preservation, and phased liquidity

One data point that consistently surprises founders: ESOP-owned AEC firms in the Zweig Group's valuation surveys command 90% higher EBITDA multiples than non-ESOP peers, and have 35% higher value per employee. This is not a compensation for reduced liquidity — it is evidence that employee ownership structures, when implemented in culturally aligned firms, genuinely produce better financial performance. The NCEO meta-analysis of 102 studies and 56,984 firms confirms the relationship: ESOP participation is positively correlated with firm profitability, and the relationship strengthens as ownership participation deepens.

What Good and Bad Capital Decisions Look Like in Practice

⚠ PATTERN

Full-integration PE buyout — the talent exodus sequence

The most documented failure mode in AEC PE rollups unfolds in a consistent sequence. Acquisition is announced. The acquiring firm's integration team — experienced in financial services or healthcare, not professional engineering — begins standardising project management systems, consolidating HR platforms and eliminating what it identifies as redundant management roles. Three senior project managers, seeing their career paths narrowed and their agency relationships undervalued in the new incentive structure, accept competitive offers from a PE-backed rival. They take with them pre-qualification positions at two state DOTs and a Corps district. Within 18 months, the funded backlog that justified 40% of the acquisition multiple is materially impaired.

This is not a hypothetical. BPE Search (2025) estimates that up to 90% of M&A deals fail to deliver expected value, with poor post-merger integration at the leadership level as the primary cause. EY's research puts post-acquisition turnover at 47% in year one and 75% by year three. In AEC, where high turnover doesn't just disrupt productivity — it disrupts relationships (AVNIR/AEC Relationship Economics, 2024), these numbers represent a direct pathway from talent loss to client loss to value destruction.

Key Lesson:

The lesson is not "avoid PE." It is: interrogate the integration model. A PE firm that cannot articulate how it retains your top 15 people, by name, in the first 90 days, is telling you something important about its priorities.

✓ MODEL

NV5 Global — the local brand, central back-office formula

NV5 Global (NASDAQ: NVEE, ENR Top 25) has executed a sustained multi-decade rollup that explicitly accounts for AEC's relationship-dependent business model. The formula is structurally distinct from most PE rollups: retain local leadership, maintain local brands in all client-facing operations, centralise only what clients never see — HR, IT, finance, ERP. NV5's investor communications consistently rank talent retention as the primary post-acquisition integration KPI, above synergy realisation or margin expansion.

The NV5 model works precisely because it does not attempt to erase the cultural and relational assets that created the value it acquired. A senior project manager at a newly acquired NV5 firm continues to work under the brand her clients know, with the team she built, supported by a more capable back-office. The acquisition gives her tools, not instructions. This is the integration philosophy that distinguishes acquirers who create value in AEC from those who destroy it.

Key Lesson:

For founders evaluating any PE or strategic acquirer: the NV5 model is the benchmark to test against. Can your potential buyer describe, specifically, how your brand, your leadership team and your client relationships will be preserved? If the answer is vague, treat it as a red flag, not a detail to negotiate post-close.

✓ MODEL

Terracon Consultants — the ESOP rollup as an ownership philosophy

Terracon Consultants (100% employee-owned, Olathe, KS) is the most instructive case study in AEC for founders who are open to capital-driven growth but skeptical of PE's structural incentives. As a fully ESOP-owned firm, Terracon executed four acquisitions in 2024 — Sage Environmental, Harbor Environmental, Flat Earth Archeology and Metcalf Archaeological Consultants — without a PE sponsor, without a banker-driven exit timeline, and without the talent disruption that characterises most financially-driven rollups.

The mechanism is structurally elegant: acquired firm employees become Terracon shareholders, replacing a departure trigger with an ownership incentive. There is no "announcement shock" because the announcement is not a change of control — it is an invitation into an ownership community. Terracon's consistent recognition in the Environmental Business Journal M&A Awards (2023 and 2024) reflects execution quality, not just volume. The firm has demonstrated, across decades of acquisitions, that disciplined growth and employee continuity are not in tension — they are the same strategy.

Key Lesson:

Terracon is proof that the ESOP model is not a consolation prize for founders who cannot attract PE interest. It is a deliberate governance philosophy that happens to produce superior employee retention, competitive talent positioning and — per Zweig Group's data — higher firm valuations than most alternatives.

The Family Office Alternative: Longer Clocks, Different Incentives

One capital source that many AEC founders do not consider — because investment bankers do not lead with it — is the family office. Family office allocations to private equity have grown from 22% of portfolios in 2021 to 27–30% in 2024 (UBS Family Office Survey; Deloitte 2024), with private equity now surpassing public equity as the primary asset class for single-family offices. More importantly, family offices are increasingly pursuing direct investments and minority stakes in mid-market companies, precisely the segment where founder-led AEC firms sit.

The structural differences from institutional PE are meaningful. Family offices invest to compound over multi-decade horizons, not to deliver within a fund's LP return schedule. Their typical direct investment hold period extends to 7–10 years or longer — a fundamentally different governance clock than traditional PE. They often share values orientation with founders: legacy preservation, employee stability and community positioning matter to families that built businesses themselves, in ways that are simply not legible in a traditional PE fund's mandate.

The trade-off is real: family offices are less operationally involved, offer less management infrastructure support, and their deal sourcing process is less systematised than institutional PE (meaning the search process takes longer). But for a profitable, well-managed AEC firm seeking patient capital, minority liquidity and a governance partner without an aggressive exit agenda, the family office channel is worth understanding — and most founders have never been introduced to it.

The Questions That Actually Matter Before Any Process

Regardless of which capital pathway a founder ultimately pursues, these are the five questions whose answers determine the quality of that decision — and the quality of the outcomes for everyone the decision affects.

1	Who are your top fifteen people — and what would make each of them leave? In AEC, your firm's enterprise value lives in its relationships: with clients, agencies, subconsultants and regulators. Those relationships are held by specific people. Before any capital conversation, map the individuals who carry that value, understand their motivations and vulnerabilities, and design retention structures that survive an ownership event. Every capital structure has different implications for these people — and those implications should drive the structure choice, not follow from it.
2	What does your client relationship portfolio actually look like on paper? If your most important client relationships are documented only in the heads of three senior PMs, you have a continuity problem regardless of what capital decision you make. Document every key client relationship: who holds it, who the secondary holder is, what the history is, what the renewal or recompete timeline looks like. This is not just PE preparation — it is the fundamental resilience infrastructure every mid-market AEC firm needs.
3	What do you actually want — and on what timeline? Full liquidity in three years, partial liquidity now with continued upside, employee ownership legacy, independence preserved for the next decade — these are different objectives that point to fundamentally different capital structures. The founders who get poor outcomes typically enter a process without having answered this question clearly, and end up negotiating on the buyer's terms rather than their own. Answer this first. The rest of the analysis follows from it.
4	What is your management bench — and can your firm operate without you? Every capital buyer — PE, strategic acquirer, ESOP trustee or family office — will price the risk that the firm's value walks out the door when the founder does. Reducing key-person concentration is the single most impactful pre-transaction investment available to most founders, and it takes the longest to accomplish. If you are still the primary relationship holder for more than a third of your revenue, that concentration will be priced into every offer you receive.
5	What does your clean EBITDA look like — and who bears the risk of the gap? Quality of Earnings studies will adjust your stated EBITDA for above-market owner compensation, non-recurring revenue and related-party transactions. The gap between your internal EBITDA and QoE-adjusted EBITDA is the most common cause of deal re-trades at LOI. Commissioning a shadow QoE 18 months before any process is the highest-ROI preparation your CFO can undertake — and it applies equally to ESOP valuations, minority PE term sheets and strategic acquisition processes.

Capital strategy starts before the banker calls.

Stratwell Partners works with mature AEC firms on growth planning and capital decisions needed to support it. Book a confidential conversation.

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SOURCES & FURTHER READING

• EY — M&A Integration and Post-Acquisition Turnover Research · ey.com

• McKinsey & Company — M&A Post-Merger Integration Leadership Research

• Capstone Partners — AEC Services Market Update, June 2025 · capstonepartners.com

• FMI Corporation / CFMA — 2024 Ownership Transfer and Management Succession Study · fmicorp.com

• Zweig Group — 2021 and 2025 Valuation Surveys; 2024 Recruitment & Retention Report · zweiggroup.com

• NCEO (National Center for Employee Ownership) — Meta-analysis: Employee Ownership and Firm Performance; Employee Ownership 100 List 2024 · nceo.org

• BDO — Why ESOPs Are Becoming More Popular Among Architecture and Engineering Firms, April 2025 · bdo.com

• ActionsProve / Engineering Management Institute — Future of Work in Engineering & Architecture 2024 · engineeringmanagementinstitute.org

• PSMJ / ClearlyRated — AEC Client Retention Benchmarks; Why AEC Firms Lose Repeat Clients, January 2026

• Cherry Bekaert / Pitchbook — Private Equity Mid-Year Trends 2025 · cbh.com

• UBS — 2024 Global Family Office Report · ubs.com

• Deloitte — Family Office Insight Series: Global Edition, Defining the Family Office Landscape, 2024