Zachary R.Brecheisen (Zach)


Pittsburgh + 1.412.394.7284

Zach Brecheisen is a corporate lawyer focusing his practice on mergers and acquisitions and other strategic transactions. He counsels clients on a variety of corporate governance matters, including activist investor campaigns. Zach places a premium on efficiency in providing clients with forthright and practical legal advice in high-pressure situations. He taps his background as an engineer to manage cross-functional teams on complex issues, all while driving transactions forward and achieving client goals. Zach is recognized by Chambers USA and praised by clients for his "extreme efficiency" and ability to "keep it concise."

Zach advises clients across a broad range of industries. Recently he represented Evoqua (NYSE: AQUA) in its $7.5 billion sale to Xylem, Cibus Global (Nasdaq: CBUS) in its reverse merger with Calyxt, and Misonix (Nasdaq: MSON) in its $520 million sale to Bioventus. He represented Ansys (Nasdaq: ANSS) in numerous acquisitions (including its $700 million acquisition of AGI) and NEP Group in its acquisition of virtual production firm Lux Machina. Zach proudly advised midwestern stalwarts like U. S. Steel (NYSE: X) in its sale of Transtar for $640 million and its option agreement with Stelco for a potential $2.4 billion joint venture.

Prior to law school, Zach was a project engineer advising electric utilities on transmission and distribution system planning and arc-hazard protection.

Zach is co-chair of the Firm's LGBTQ+ Affinity Group and has been honored by Penn State University and The Legal Intelligencer for his contributions to the law school and dedication to diversity and inclusion in the profession.


  • Valmet acquires process gas chromatography business of Siemens AGJones Day advised Valmet Oyj in the €102.5 million acquisition of the process gas chromatography business of Siemens AG.
  • FirstEnergy sells $3.5 billion transmission stake to BrookfieldJones Day advised FirstEnergy Corp. in the $3.5 billion sale of an additional 30.0% equity stake in its subsidiary FirstEnergy Transmission (“FET”), the holding company for FirstEnergy’s three regulated electric transmission businesses, to North American Transmission Company II L.P., FirstEnergy’s existing joint venture partner in FET and a controlled investment vehicle entity of Brookfield Infrastructure Partners.
  • U.S. Steel invests in Freespace RoboticsJones Day advised United States Steel Corporation in its investment in Freespace Robotics, Inc., a robotics and artificial intelligence venture company, headquartered in Pittsburgh, PA that operates in partnership with the National Robotics Engineering Center (NREC) and Carnegie Foundry, LLC at Carnegie Mellon University.
  • ETS acquires PSIJones Day advised Educational Testing Service (ETS) in its acquisition of PSI Services LLC, a global leader in test development and delivery across workforce certification and licensure.
  • Catalent announces governance enhancements and new initiatives to drive valueJones Day advised the Board of Directors of Catalent, Inc. in connection with its entry into a cooperation agreement with activist shareholder Elliott Management.
  • Ansys acquires DiakoptoJones Day advised Ansys in the acquisition of Diakopto, a provider of differentiated EDA solutions to accelerate integrated circuit (IC) development.
  • Cibus combines with CalyxtJones Day advised Cibus Global, LLC (“Cibus”), a San Diego based leader in precision gene editing in agriculture, in connection with an all-stock merger with Calyxt, Inc. (NASDAQ: CLXT), under which Cibus and Calyxt created an industry-leading company that combines two pioneers in agriculture-based gene editing and establishes one of the world’s most sophisticated facilities for trait development and plant breeding.
  • Evoqua merges with Xylem in $7.5 billion all-stock transactionJones Day advised Evoqua Water Technologies Corp. (NYSE: AQUA) in its $7.5 billion stock-for-stock merger with Xylem Inc. (NYSE: XYL).
  • Home Point Capital sells wholesale originations business to The Loan StoreJones Day advised Home Point Capital Inc. in the sale of certain assets of its wholesale originations channel to The Loan Store, Inc., a national wholesale lender headquartered in Tucson, Arizona.
  • Rockwood Equity Partners sells BJG Electronics, Inc. to FDH AeroJones Day advised Rockwood Equity Partners LLC in connection with its sale of portfolio company BJG Electronics, Inc. ("BJG"), a global supplier of interconnect and electromechanical products to the world’s leading OEMs in the defense, commercial aviation, business aviation, space, oil and gas, and industrial markets, to FDH Aero ("FDH"), a portfolio company of Audax Private Equity.
  • Organon makes strategic investment in Claria MedicalJones Day advised Organon in the strategic investment in Claria Medical, Inc. a privately-held company developing an investigational medical device being studied for use during minimally invasive laparoscopic hysterectomy.
  • FirstEnergy acquires transmission assets from The Toledo HospitalJones Day represented American Transmission Systems, Inc., an affiliate of Akron-based FirstEnergy Corp., in connection with the acquisition of certain transmission assets from The Toledo Hospital.
  • Archaea Energy acquired by bp for approximately $4.1 billionJones Day represented the management team and co-founders of Archaea Energy Inc., an industry-leading renewable natural gas ("RNG") company, in connection with Archaea’s acquisition by bp plc.
  • FirstEnergy purchases certain transmission assets from BP-Husky Refining LLCJones Day represented FirstEnergy Corp. in connection with the purchase of certain transmission assets from BP-Husky Refining LLC.
  • Avient divests distribution business to H.I.G. CapitalJones Day advised Avient Corporation in the $950 million sale of its Distribution business to an affiliate of H.I.G. Capital.
  • Global internet infrastructure provider acquires nine data centersJones Day advised a global internet infrastructure provider in the acquisition of nine data centers, including colocation and related network services.
  • CNX and Newlight announce strategic agreement to capture methane emissions for production of Aircarbon®Jones Day advised CNX Resources Corporation in a 15-year agreement entered with Newlight Technologies, Inc. to capture and utilize methane emissions for the production of Aircarbon®, a naturally-occurring molecule also known as PHB that replaces plastic but is carbon-negative and biologically degrades in natural environments.
  • Ansys strengthens electric machine design offerings through acquisition of Motor Design LimitedJones Day advised Ansys in the acquisition of Motor Design Limited.
  • Ansys, Inc. acquires OnScale, Inc.Jones Day advised Ansys, Inc. in the acquisition of OnScale, Inc., a cloud simulation provider.
  • United States Steel Corporation makes strategic investment in Carnegie FoundryJones Day advised United States Steel Corporation in its investment in Carnegie Foundry, LLC, a robotics and artificial intelligence venture studio, headquartered in Pittsburgh, PA that operates in partnership with the National Robotics Engineering Center (NREC) at Carnegie Mellon University in commercializing and scaling its industrial automation portfolio of robotics and AI technologies in advanced manufacturing, automated warehouses and supply chains, industrial robotics, integrated systems, autonomous mobility, voice analytics and more.
    • April 18, 2024
      M&A Roadmap for 2024: Key Considerations and Trends for Dealmakers, Jones Day CLE Academy
    • February 17, 2022
      M&A Execution in 2022: Perspectives from the Legal Experts, MergerWare
    • February 7 and 8, 2013
      Shale 101: Introduction to Business and Legal Developments in the Appalachian Basin, Jones Day Pittsburgh