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Boston, MA

Byron S. Kalogerou

McDermott Will and Emery
Mergers & Acquisitions


    Byron S. Kalogerou is the founder and chair of the Firm’s Life Science Industry Group and leads the Boston Corporate Practice. Byron focuses his practice on domestic and cross-border mergers and acquisitions, finance, and joint ventures and alliances. He has substantial on-the-ground experience structuring mergers, acquisitions, divestitures and joint ventures on six continents. Byron has extensive industry background in the medical device, industrial and manufacturing sectors. He also acts as outside general counsel to a number of companies.

    Byron spent 17 years in-house, where he served in various general counsel roles at Tyco International, including as general counsel of its fire and security and telecom businesses and as general counsel of its international legal department, a function he created. Byron led or managed many of Tyco’s largest merger and acquisition (M&A) deals, including the $12 billion acquisition of AMP Inc. and the $850 million purchase of AT&T Submarine Systems, and handled hundreds of middle-market deals around the globe. Byron handled Tyco’s initial foray into medical devices and led and managed many of the deals that led to the creation of Covidien, recently acquired by Medtronic.

    Byron returned to law firm life 11 years ago with a desire to bring his keen sense of the “voice of the customer” to drive value and efficiency into the deal process. Byron is a pioneer in the use of legal project management and co-chair of the American Bar Association (ABA) Committee on Mergers and Acquisitions’ Task Force on Legal Project Management. He is co-editor of a forthcoming ABA Guidebook on using legal project management tools to drive predictability, accountability, efficiency and transparency into the deal process. Byron also created the first-of-its-kind web-based collaborative deal management portal, which the Firm has adopted and embraced as the M&A Gateway. Byron is also one of the Firm’s primary contacts with the Association of Corporate Counsel.

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