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Acquiring essential infrastructure businesses

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Malcolm Hamilton

Managing Partner

About Stoneweir
Stoneweir is a dedicated acquirer of essential infrastructure services businesses across water, wastewater, environmental compliance, and industrial maintenance sectors. We focus on companies with $1–5 million in EBITDA that serve municipal, utility, and industrial customers through recurring contracts, regulatory mandates, or mission-critical service relationships. Our investment thesis centers on fragmented, non-discretionary service categories where operational expertise, multi-year contracts, and certification or regulatory requirements create durable competitive advantages.


Managing Partner
Stoneweir is led by Malcolm Hamilton, who brings deep operational and financial expertise from more than a decade in utility financial management. As FP&A Principal at Metropolitan Water District of Southern California, a regional water utility providing water to over 19 million people in Southern California, Malcolm led the debt repayment modeling for an $8 billion construction project and authored the financial forecasting section of the agency's Long-Range Finance Plan.

 

Previously, he served as the Financial Officer for the City of Santa Barbara's water and wastewater utilities, where he led financial negotiations for a landmark 50-year water supply agreement and administered $100 million in annual operating and capital budgets. More recently,  he has supported business valuations, capital raising, and M&A transactions through a boutique investment bank in Los Angeles. Malcolm started his career in transportation operations, helping to manage an entry-level staff of 140 employees with his colleagues.

 

Malcolm holds an MBA from UCLA Anderson School of Management and completed his investment banking training with Bank of America. He brings hands-on understanding of how essential infrastructure businesses operate: from capital planning to regulatory compliance and contracting.


Capital and Closing Capability
Stoneweir has access to equity and debt capital through established investor and institutional relationships. We are prepared to acquire businesses ranging from $5 million to $25 million in enterprise value. Malcolm's background modeling complex infrastructure deals, performing due diligence, and negotiating multi-party agreements ensures smooth execution from term sheet through closing. We prioritize working directly with owners and brokers who understand their clients' businesses. I recognize there may be family members or existing leaders involved in the business, and if there were ever a conversation about transition, our preference would be to support and back the people who already understand the company, rather than come in with an outside team.

Malcolm's Promises...

1

This isn't a transaction where analysts in another state run your business via spreadsheet. I will be there, on the ground, committed to the business daily.

2

I will have controlling interest in the business. The person touring your facility, meeting your crew, and negotiating terms is the same person who will have the final say on all future business decisions.

3

No post-close layoffs. I'm buying your business to grow it, and that requires the experienced and dedicated people who know how to deliver. As we grow, we'll be hiring more people, not fewer.

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Representative Targets

Businesses that stand out to us...

Industry Focus

  • **Primary Focus** Water and Wastewater Services

  • Solid Waste Services

  • Environmental Compliance & Remediation

  • Building Systems Maintenance

  • Industrial Cleaning & Waste Services

  • Calibration & Testing Services

  • Healthcare Facilities Services

  • Transportation Infrastructure Services

Desirable Qualities

  • Established and capable management team

  • Certification/licensing barriers

  • Fragmented market

  • Regulatory/compliance mandates

  • Minimal technology disruption risk

  • Motivated seller

  • Aftermarket pull-through (parts, consumables, retesting)

Financial Profile

  • EBITDA: $1M-$5M

  • EBITDA Margins: 15%+

  • High incidence of multi-year/recurring revenue

  • Minimal customer concentration

  • Available financing

  • Historical revenue and cash flow growth

Frequently asked questions

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