Mary E. Mongioi is a Partner at Forchelli Deegan Terrana LLP, where she serves as Co-Chair of the firm’s Corporate and Mergers & Acquisitions Practice Group and Chair of the firm’s Veterinary Practice Group.

Ms. Mongioi concentrates her practice on corporate, transactional, regulatory, and M&A matters, with a particular focus on the veterinary, med spa/aesthetic health care, and other health care-adjacent industries. She regularly represents private equity-backed platforms, consolidators, roll-ups, individual practice owners, investors, and closely held businesses in connection with acquisitions, sales, practice transitions, buy-ins, partnership and ownership matters, financing transactions, leases, real estate matters, and a wide range of commercial agreements.

Ms. Mongioi’s veterinary practice is both deep and long-standing. She guides clients through the full life cycle of their practices, from initial formation, structure, and growth strategy through complex acquisitions, financings, sales, and succession planning. Her work includes advising private equity-backed consolidators, corporate platforms, and individually owned practices on corporate governance, deal structure, operational matters, associate and employment-related agreements, restrictive covenants, vendor and service agreements, DEA compliance, and other contracts central to the ownership and operation of veterinary practices.

In recent years, Ms. Mongioi has also developed an extensive and growing practice in the med spa and aesthetic health care space. She represents private equity-backed roll-ups, management services organizations, investors, founders, and operators in mergers and acquisitions, platform growth, regulatory structuring, ownership and management arrangements, management services agreements, commercial contracts, and related transactional matters. Her work in this area includes advising clients on the corporate and regulatory considerations unique to med spa and aesthetic businesses, including ownership structure, operational compliance, and growth strategies.

Ms. Mongioi also has experience in dental and other professional practice transactions, including acquisitions, sales, partnership arrangements, leases, and related business matters.

In addition, Ms. Mongioi has substantial experience in DEA and regulatory compliance, particularly within the veterinary and health care-adjacent industries. She counsels clients on controlled substance issues, DEA audits, diversion matters, and related operational concerns.

Earlier in her career, Ms. Mongioi developed significant experience in Trusts & Estates, estate litigation, fiduciary matters, and related litigation. She continues to draw upon that background in advising clients on business succession, ownership transitions, and related planning issues. While her current practice is focused primarily on corporate, M&A, regulatory, and industry-specific transactional matters, she remains a valuable resource for clients seeking guidance in connection with estate-related matters and coordination with the firm’s Trusts & Estates attorneys.

Ms. Mongioi is active in several professional and industry organizations. She is a member of VetPartners, where she served as Chair of the 2021 Virtual Annual Meeting; the Long Island Veterinary Medical Association; the Alliance of Merger & Acquisition Advisors; and the Nassau County Bar Association, where she formerly chaired the Community Relations and Real Estate Committees. She also serves on the Dean’s Advisory Board of Long Island University’s College of Veterinary Medicine.

Ms. Mongioi has been recognized by Crain’s New York Business as a Notable Woman in Law, by Long Island Business News as one of its Top 50 Women and Most Dynamic Women Leaders, and by Super Lawyers. She is a frequent speaker and author on veterinary, med spa, M&A, DEA compliance, and business law topics.