Strategic Growth Acquisition of Professional Engineering Associates expands geographic reach and service capabilities, creating cross-sell opportunities into PEAs client base and strengthens national footprint for life sciences and mission-critical facilities.

Life Sciences Focus Deep specialization in life sciences, pharmaceutical, and biotech sectors positions Mainstay as a preferred engineering partner for compliant, high-stakes projects, offering entry points for large campus builds, facility expansions, and retrofit programs.

Referral Driven With a track record of over 90 percent of work from referrals and repeat business, there is strong leverage for targeted outreach to existing clients and partners to expand scope of services and capture additional project opportunities.

Regional Expansion Established project delivery across Northeast, Southeast, Midwest, and Central U.S. presents opportunities to win new contracts in underpenetrated markets and pursue multi-site, end-to-end engineering engagements for complex facilities.

Diversified Capabilities Multi-discipline engineering for industries beyond life sciences, including data centers, healthcare, energy, and manufacturing, enables cross-industry upsell conversations and resilience against sector-specific downturns.