Valuing an engineering consulting firm requires isolating EBITDA, evaluating client diversification and PE scalability, understanding backlog quality and recurring revenue, and assessing succession planning.

Start with EBITDA. Take 12 months of revenue. Subtract: (1) Direct labor (billable engineer salaries, payroll taxes), (2) Support staff (administrative, project managers), (3) Subcontracted engineering (work outsourced to other firms or independent contractors), (4) Technology and equipment (software subscriptions, CAD licenses, office equipment), (5) Facility costs (office rent, utilities), (6) Insurance and compliance (professional liability, E&O insurance, continuing education). What's left is EBITDA.

Example: $2.5M engineering consulting firm Revenue: $2,500K

Direct costs: Billable engineer labor: $1,200K (48% of revenue; assumes 65% billable utilization) Support/admin staff: $300K (12% of revenue) Subcontracted engineering: $300K (12% of revenue—assume some work is outsourced) Software/technology: $125K (5% of revenue; CAD, BIM, project management tools) Facility costs: $150K (6% of revenue) Insurance/compliance: $75K (3% of revenue) Total OpEx: $2,150K (86%)

EBITDA: $2,500K - $2,150K = $350K (14% of revenue)

Wait, that's low for a healthy engineering firm. Many run 15-25% EBITDA. Let me recalculate with more favorable numbers.

Revenue: $2,500K Direct billable labor: $1,050K (42%; higher utilization) Support staff: $250K (10%) Subcontracted work: $200K (8%; lower outsourcing) Technology: $100K (4%) Facility: $125K (5%) Insurance: $50K (2%) Total OpEx: $1,775K (71%)

EBITDA: $2,500K - $1,775K = $725K (29% of revenue)

That's more realistic for a healthy consulting firm. At 29% EBITDA margin, $2.5M revenue = $725K EBITDA. At 5.5x EBITDA (mid-range multiple for solid consulting firm): Enterprise Value = $725K × 5.5 = $3.99M ≈ $4M.

Now apply adjustments based on quality factors:

Client concentration: No client >15% = base multiple. Largest client 15-20% = -0.2x to -0.3x. Largest client 20-30% = -0.5x to -0.75x. Top 3 clients >50% = -1.0x to -1.5x (serious risk).

PE count and depth: 4+ PEs with succession pipeline = +0.5x to +1.0x (scalable, lower key person risk). 3 PEs, stable = base. 2 PEs = -0.3x to -0.5x. 1 PE = -1.0x to -1.5x (maximum key person discount).

Specialization: Strong niche expertise, market-recognized = +0.3x to +0.5x (pricing power, defensibility). General consulting = base (more competition, commoditized).

Backlog quality: 12+ months contracted, diversified by client = base multiple. 8-10 months = -0.2x to -0.3x (less visibility). <6 months = -0.5x to -0.75x (project-to-project risk).

Recurring revenue: 40-50% retainer = base. 30-40% = -0.1x to -0.2x. <20% = -0.3x to -0.5x (all project-based, volatile).

Succession plan: Clear plan, documented, next-gen PE ready = +0.3x to +0.5x. No plan or principal PE approaching retirement = -0.5x to -0.75x (transition risk).

Example valuation (strong firm): Base: $725K × 5.5x = $3.99M Adjustments: + No client >12% of revenue: +0.2x + 4 PEs, 2 junior engineers in pipeline: +0.5x + Strong specialization (geotechnical), market-recognized: +0.4x + 14 months backlog, diversified projects: +0.2x + 45% retainer revenue, growing: +0.1x + Clear succession plan, #2 PE ready to lead: +0.3x

Net: +1.7x Final multiple: 5.5x + 1.7x = 7.2x Final valuation: $725K × 7.2 = $5.22M

Example valuation (weak firm): Base: $725K × 5.5x = $3.99M Adjustments: - Largest client 28% of revenue: -0.4x - 1 senior PE, approaching retirement, no pipeline: -1.2x - General consulting, competitive marketplace: base - 4 months backlog, concentrated in top 2 clients: -0.5x - 15% retainer (mostly project-based): -0.3x - No succession plan documented: -0.6x

Net: -3.0x Final multiple: 5.5x - 3.0x = 2.5x Final valuation: $725K × 2.5 = $1.81M

The same EBITDA yields $5.22M (strong) vs. $1.81M (weak)—a $3.41M valuation gap driven by diversification, PE bench, specialization, and succession planning.

Final considerations:

Owner involvement in sales: If principal PE is also the lead salesman (responsible for landing 60%+ of new projects), post-acquisition the firm loses business development momentum if owner departs. Buyers require 2-3 year employment agreement with earnout tied to revenue retention. A firm with separate business development person/team is lower-risk.

Technology and tools: A firm with modern project management software, BIM capability, and documented processes is more scalable. One relying on owner's institutional knowledge is not. Tech-enabled firms trade at premium multiples (+0.2x-0.3x).

To increase valuation in 12-18 months: 1. Hire/develop 2 additional PEs (diversify from 1-PE to 3-PE; adds $500K-800K revenue capacity and shifts multiple from 4x to 5.5x-6x). 2. Grow retainer revenue from 20% to 40% of total (convert project clients to recurring relationships; adds stability, +0.2x-0.3x multiple). 3. Build specialization brand (publish papers, speak at conferences, win industry awards; adds +0.2x-0.3x multiple). 4. Expand backlog from 4 months to 12+ months (win larger, longer-term contracts; adds +0.3x-0.5x). 5. Document succession plan (identify and develop next-gen PE leader; adds +0.3x-0.5x by reducing transition risk).

These moves can shift valuation from 2.5x ($1.81M) to 6.5x-7x EBITDA ($4.7M-$5.1M)—a 160-180% increase in 18 months.