
Executive Compensation
Employee Benefits
Corporate M&A
Corporate Governance
Jeannine McSweeney is a Partner at Simpson Thacher & Bartlett in New York City, specializing in executive compensation and employee benefits. She advises private equity investors, public companies, and other clients on complex transactions, with a focus on mergers and acquisitions and initial public offerings. Her notable clients include Blackstone, Hellman & Friedman, and TD Bank. Jeannine is recognized as a leading lawyer in her field by Chambers USA and The Legal 500 United States. She holds an LL.M. from New York University School of Law, a J.D. and M.B.A. from Syracuse University, and a B.A. from the University of Rochester.
Private Equity Transactions
Corporate Transactions
Healthcare and Life Sciences
Financial Services

- Laborie Medical Technologies acquired the target/assets from Organon in an acquisition on an undisclosed date. - Deal value was 465000000 Sector: Healthcare; Location: Global. - On the acquirer side, legal representation details are not available, but involved lawyers include Michael Holick, Keegan Lopez, Jeannine McSweeney, Vanessa Burrows, Mika Reiner Mayer, Charity Williams.
Nov 07 2025
465M
M&A
Partner
2019 – Unknown
Associate
2012 – 2019
Executive Compensation and Employee Benefits - Vice President
2009 – 2012
Tax Associate
2008 – 2009


- OneDigital acquired OneDigital from OneDigital in a private equity on 2025-09-19. - Deal value was 70000000000 (source: Extracted) Ownership: majority stake; Sector: Insurance; Location: USA. - On the acquirer side, Paul, Weiss advised, led by Eric Wedel, Ben Steadman, James Cross, Christian Fischer, Jennifer Albrecht.
Sep 19 2025
7B
Private Equity
1 min
Tax Associate
2006 – 2007