DPIS Builder Services (Saw Mill Capital) Acquires The Ei Companies

Installed Building Products Acquires Diamond Energy Systems (DESI)

May 20, 2026

Industrial Services

Installed Building Products, Inc. (NYSE: IBP) announced the acquisition of Diamond Energy Systems, Inc. (DESI), a Minnesota-based mechanical insulation services company. The deal adds approximately $12 million in annual revenue and expands Installed Building Products’ mechanical insulation offerings across the Upper Midwest retrofit market.

CEIS (White Wolf Capital-backed) Acquires IEM Energy Consultants

July 31, 2023

Energy

Critical Energy Infrastructure Services (CEIS), a platform formed by White Wolf Capital, has acquired IEM Energy Consultants, a U.S. provider of owners' engineering, operations & maintenance consulting, outage planning, and asset management services for power generation clients. The acquisition expands CEIS's O&M and engineering capabilities as the third add-on to the CEIS platform; financial terms were not disclosed.

Milrose Consultants (backed by Southfield Capital) Partners with Special Inspection Services (SIS)

November 30, 2021

Engineering Services

Milrose Consultants, a platform backed by Southfield Capital, announced a strategic partnership to add Special Inspection Services (SIS) Engineering, DPC — a Bohemia, New York-based inspections and construction consulting firm — to its special inspections capabilities. The transaction expands Milrose's national service offering alongside prior add-ons (Permit Advisors, Integrated Group) to better serve Class A commercial real estate clients.

DPIS Builder Services Acquires Building Energy

July 26, 2021

Construction

DPIS Builder Services, a Houston-based provider of builder services owned by Saw Mill Capital, acquired Building Energy, a Star, Idaho-based HERS rating and building energy certification company. The add-on expands DPIS's footprint and capabilities in the Northwest (Boise, Coeur d'Alene, Spokane) and brings Building Energy's team into DPIS to support ENERGY STAR and other efficiency programs.

DPIS Builder Services Acquires Home Energy Division of Ensign Building Solutions

May 6, 2021

Construction

DPIS Builder Services, a Saw Mill Capital portfolio company, acquired the Home Energy Division of Ensign Building Solutions to strengthen its East Region capabilities and expand its HERS rating and energy inspection services in the Southeast. The add-on expands DPIS's national footprint and increases its scale within builder services, contributing to a combined staff base of over 600 locally positioned employees across the U.S.

Saw Mill Capital Acquires DPIS Builder Services

September 6, 2019

Engineering Services

Saw Mill Capital Partners II, LP and affiliated funds managed by Saw Mill Capital LLC acquired DPIS Engineering, LLC, dba DPIS Builder Services, a Houston-based provider of outsourced engineering, inspection, energy efficiency, and quality assurance services for single-family homebuilders. Terms were not disclosed; CIBC Cleary Gull acted as exclusive financial advisor to DPIS and this marks the sixth investment from Saw Mill's most recent fund.