Seattle, WA (September 4, 2025) – Rainier Partners, a private equity firm investing in lower middle-market services businesses, is pleased to announce its investment in Kleen-Tech Services, a janitorial services provider with operations across more than 30 states.
Kleen-Tech was founded in 1993 in Denver, Colorado, and has since grown into a leading national provider of janitorial and related services to commercial, government, and other specialty sectors. The company serves an array of end markets through its nine brands: Kleen-Tech, Arnold’s, National Facility Services, ARC Maintenance, Sentinel Maintenance, Peterson Cleaning, Signature Facilities, Sonoran, and IFS Group. Its proprietary operational systems and processes enable its approximately 2,000 employees to deliver exceptional service nationwide.
“We are proud of what we’ve created at Kleen-Tech and the exciting future that is ahead of us through our new partnership with Rainier Partners,” said Kleen-Tech CEO Brad Brandt. “Kleen-Tech is led by our guiding principles and our philosophy to achieve excellence every day. With Rainier’s strategic support and resources, we’re positioned to accelerate our growth while maintaining the quality and service our clients have come to expect.”
“The Kleen-Tech team has built a strong, diversified foundation rooted in operational excellence and a differentiated focus on customer retention,” said Rainier Co-Founder and Managing Partner Alex Rolfe. “We are proud to have been selected to partner with Kleen-Tech.”
Under Rainier’s ownership, the company will seek to further invest in organic growth initiatives and pursue strategic M&A opportunities while maintaining a culture of continuous operational improvement.
“We’re excited to partner with Kleen-Tech as we begin a new chapter together,” said Rainier Principal Luke Bench. “Rainier will provide significant financial and operational resources, including the implementation of our SUMMIT value creation process, to supplement the company’s continued growth.”
Kleen-Tech is actively seeking to partner with janitorial service providers. Business owners interested in learning more should contact Luke Bench at lbench@rainierpartners.com.
Piper Sandler served as buy-side advisor to Rainier Partners. G2 Capital Advisors served as the sell-side advisor to Kleen-Tech.
Kleen-Tech Services is a janitorial service provider focusing on interior and exterior cleaning, disinfecting, high-access cleaning, and floor care services. The company operates across the country under its nine brands: Kleen-Tech, Arnold’s, National Facility Services, ARC Maintenance, Sentinel Maintenance, Peterson Cleaning, Signature Facilities, Sonoran, and IFS Group. Kleen-Tech’s strong customer relationships are supported by the company’s focus on operational excellence. Please visit www.kleen-tech.com for more information.
Rainier Partners is a Seattle-based private equity firm with over $400 million in assets under management that invests in lower middle-market services businesses. We look for opportunities where we can actively support business owners and management teams by providing growth capital, operational resources, and strategic partnership. We focus on industries in which we have extensive experience, a network of partners, and deep resources: business services, consumer services, industrial services, and financial services. We typically invite the founders or management teams of our portfolio companies to invest alongside us to align interests. Please visit www.rainierpartners.com for more information.