Business servicesAngeles Equity Partners-backed O'Hara's Son Roofing buys Total Systems RoofingHeadquartered in Chicago, OSR is a commercial roofing firm.ByIris Dorbian3 June 2025•1 min readJavaScript is required to read this article. Please enable it in your browser and reload the page.DealsNorth AmericaUSBusiness servicesBriefs