Kleen-Tech Services Acquires Sentinel Maintenance Inc.

Concierge Building Services Acquires Kleen-Tech

June 27, 2019

Environmental Services

Concierge Building Services, an independent sponsor, has acquired Kleen-Tech, a commercial janitorial and custodial services provider. The deal positions Kleen-Tech as a platform for growth under Concierge’s plan to professionalize and modernize operations while enabling liquidity for Kleen-Tech’s shareholders.

Rainier Partners Acquires Kleen-Tech Services

September 4, 2025

Industrial Services

Rainier Partners, a Seattle-based private equity firm, has acquired Kleen-Tech Services, a Denver-founded national janitorial and facilities services provider operating across more than 30 states with approximately 2,000 employees. Under Rainier's ownership, Kleen-Tech will pursue organic growth and strategic M&A while leveraging Rainier's SUMMIT value creation process; Piper Sandler advised Rainier and G2 Capital Advisors advised Kleen-Tech on the transaction.

Tenex Capital Management Invests in Sentinel Technologies

November 3, 2025

IT Services

Tenex Capital Management has made a growth investment in Sentinel Technologies, a Chicago-based provider of IT solutions, managed services, and managed security services. The investment closed on November 3, 2025; Sentinel, which employs nearly 700 people, will use the capital to accelerate growth and expand its service capabilities across education, healthcare, government, financial services, and other end markets.

Kleen-Tech Services Acquires IFS Group, Inc.

July 17, 2023

Industrial Services

Kleen-Tech Services, a nationwide janitorial and custodial services provider based in Denver, has acquired IFS Group, a Charleston-based janitorial and facilities services firm founded in 2002. The acquisition expands Kleen-Tech’s operations into Eastern markets and adds local operational resources and client relationships in the Charleston area.

TechPro Power Group Acquires Sentinel Power Services

February 28, 2022

Engineering Services

TechPro Power Group Inc. has acquired Sentinel Power Services, Inc., including its subsidiaries Pencore Engineering & Consultants, LLC and Sentinel Field Services, LLC. The acquisition brings NETA-accredited electrical testing, commissioning, EPC and field-service capabilities into TechPro’s family of electrical and commissioning service businesses and will allow Sentinel to continue operating from its Tulsa, Oklahoma headquarters under existing management.

Sentinel Capital Partners Acquires SPL from Industrial Growth Partners

April 8, 2022

Industrial Services

Sentinel Capital Partners has acquired SPL, a Houston-based testing, inspection, and certification (TIC) services provider for energy and environmental markets, in a transaction that closed April 7–8, 2022. The acquisition purchases SPL from Industrial Growth Partners (with management having been a prior co-investor) and positions SPL as a platform to accelerate organic growth and add-on acquisitions across energy, environmental, and international end markets.