Life Sciences Focus Strong specialization in life sciences, pharmaceutical, and mission-critical facilities positions Mainstay to cross-sell to biotech manufacturers, contract development and manufacturing organizations (CDMOs), and healthcare data centers seeking compliant, reliable engineering partners.

Acquisition Momentum Recent acquisition of Professional Engineering Associates expands civil and structural capabilities, enabling cross-sell to broader client bases and larger project scopes in both existing and new markets.

Referral-Driven Growth Over 90 percent of work generated through referrals and repeat business indicates high client satisfaction and potential for targeted account-based outreach to top clients and their networks.

Geographic Reach Extensive U.S. footprint with licenses in all states and international capabilities creates opportunities to pursue multi-site, nationwide, or cross-border projects for clients with distributed operations.

Mid-Mized Revenue Upsell Revenue scale in the $10–$25 million band suggests potential for expanding project scopes, adding ancillary services (design optimization, commissioning, validation, energy efficiency), and pursuing adjacent engineering disciplines.