Calfee Congratulates Client Hussung Mechanical and Hussung Service on its Sale to Optimum Energy Co., a Bernhard Capital Partners Portfolio Company

Calfee congratulates its client, Hussung Mechanical Contractors and HMC Service Company (collectively, “HMC”), a fourth-generation family owned company, on its recently completed investment transaction with Optimum Energy Co., a Bernhard Capital Partners portfolio company. HMC is a Louisville, Kentucky-based full-service mechanical infrastructure solutions provider for healthcare systems, universities, manufacturers, data centers, and mission-critical facilities across the Mid-South, serving the region for more than 60 years. The Hussung businesses will continue operating under their own names and brands, as part of the Optimum Energy group.

Optimum Energy, a Bernhard Capital Partners portfolio company, is a global leader in holistic infrastructure solutions, delivering integrated services across the full facility lifecycle for mission-critical facilities. The addition of HMC’s mechanical contracting and field service expertise expands Optimum Energy’s in-house execution capability and strengthens its ability to self-perform across every phase of the infrastructure lifecycle. 

Bernhard Capital Partners is a private markets investment firm focused on building market-leading infrastructure services and asset platforms across essential sectors. With more than $6 billion in assets under management, the firm invests in complex, expansive and often regulated markets characterized by durable demand. 

Calfee was pleased to represent HMC in this transaction. The Calfee transaction team was led by Firm Chairman and Corporate and Finance Partner Douglas A. Neary and Partner and Corporate and Finance Practice Co-Chair Brent M. Pietrafese and included Senior Counsel Erik H. Nielsen and Associate Attorneys Lauren Christine Kulik and Jonathan P. Ziga. The team was assisted by Antitrust Partner Maura L. Hughes and Associate Attorney Nicholas A. Bonaminio; Intellectual Property Partner Ryan W. Falk and Associate Attorney Dustin D. Likens; Employee Benefits and Executive Compensation Partner Steven W. Day and Associate Attorney Nicolette T.E. Cregan, Labor and Employment Partner Jennifer Walwyn Colvin; Tax Partner Michael K. Gall and Senior Counsel Victoria Diaz Pianta; and Environmental Law Senior Attorney Christopher M. Ward.

Read the full release here. 

With 50+ dedicated attorneys, the Corporate and Finance practice group at Calfee, Halter & Griswold LLP is one of the largest and most prolific in Ohio, handling a significant number of complex and sophisticated business and financial transactions for clients across the country and around the world. Calfee has a sophisticated and robust Mergers and Acquisitions, Divestitures, and Sales practice that annually consummates hundreds of M&A transactions, led by an active private equity client base and a large roster of public and significant privately held corporate clients. These financial and strategic buyers, coupled with our deep investment banking representations and relationships, drive a thriving and diverse M&A practice at Calfee. 

Calfee, Halter & Griswold LLP is a full-service corporate law firm with 170 attorneys and professionals in offices in Cleveland, Columbus, Cincinnati, and Indianapolis. Calfee serves clients in the Midwest, nationally and globally in the areas of Corporate and Finance, Employee Benefits and Executive Compensation, Energy and Utilities, Estate and Succession Planning and Administration, Government Relations and Legislation, Intellectual Property, Labor and Employment, Litigation, and Real Estate Law. Calfee has been recognized as a leading law firm by Chambers USA 2026 in Antitrust, Banking & Finance, Construction, Corporate/M&A, Employee Benefits & Executive Compensation, Energy & Natural Resources, Environment, Government Relations, Insurance, Intellectual Property, Labor & Employment, Litigation: General Commercial, Litigation: White-Collar Crime & Government Investigations, Public Finance, and Real Estate, and by Chambers HNW 2026 in Private Wealth Law. A founding member of Lex Mundi, Calfee offers international representation through a network of independent law firms with access to 22,000 attorneys located in more than 125 countries. Additional information is available at Calfee.com.