Sigora Solar Acquires Environmental Solar Design (ESDI)

Architect Equity Acquires SDI, Inc.

March 19, 2026

Professional Services

Architect Equity has acquired SDI, Inc., a provider of outsourced procurement, supply chain management, and group purchasing (GPO) services. SDI supports facility maintenance organizations with technology-enabled sourcing and purchasing solutions tailored to MRO and other indirect spend categories.

SOLV Energy Acquires SDI Services

January 15, 2025

Energy

SOLV Energy has acquired Sacramento Drilling, Inc. (dba SDI Services) to strengthen its renewable energy services and expand foundation drilling and solar pile installation capabilities. The deal brings SDI's 25+ years of experience and skilled workforce into SOLV's utility-scale solar and energy storage project execution platform to optimize installation efficiency and project delivery.

Environmental Systems Group (Bernhard Capital-Backed) Acquires ELOS Environmental

October 19, 2023

Environmental Services

Environmental Systems Group, a Bernhard Capital Partners-backed environmental services platform, has acquired ELOS Environmental, a Hammond, Louisiana-based environmental consulting firm. Financial terms were not disclosed; the add-on expands Environmental Systems Group’s consulting, GIS, and waste management capabilities and strengthens its Gulf Coast geographic presence.

Stantec Acquires Environmental Systems Design, Inc.

June 8, 2023

Engineering Services

Stantec has signed an agreement to acquire Environmental Systems Design, Inc. (ESD), a 270-person Chicago-based engineering firm specializing in mission critical and data center design. The deal—terms undisclosed and expected to close June 30, 2023—deepens Stantec's mission-critical/data center capabilities and expands its U.S. MEP and structural engineering practice by roughly 40%.

Sigora Solar Acquires Aztec Solar

October 8, 2020

Renewable Energy

Sigora Solar acquired Rancho Cordova-based Aztec Solar in a strategic move to expand its geographic footprint into California, increasing its service territory to cover over half of the U.S. population. Aztec Solar will continue day-to-day operations while gradually integrating into Sigora's back-end systems and technology platform.

Albireo Energy Acquires Environmental Energy Corp.

September 17, 2019

Energy

Albireo Energy, the building automation and energy services platform backed by Huron Capital, has acquired Environmental Energy Corp. (EEC), a Deer Park, New York–based energy management systems provider serving large commercial and higher education buildings. The deal is an add-on to Albireo's platform intended to expand its presence in the New York metropolitan market and broaden its building automation capabilities.