Tierney advises U.S. and international clients on a range of private and public M&A transactions, including cross-border transactions. Her M&A experience includes mergers, securities acquisitions, carve-outs, majority and minority investments, joint ventures and activism defense.

She also advises clients on securities and corporate matters, including debt and equity offerings, public company reporting and corporate governance. Her capital markets practice includes representation of both issuers and underwriters.

Tierney’s practice spans a range of industries, with a particular focus on the technology, fintech, life sciences and financial services sectors.