Finance and tax specialist joins Cooley

International Tax Review is part of Legal Benchmarking Limited, 1-2 Paris Garden, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2026

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement

Finance and tax specialist joins Cooley

corcoran-william-90x90

William Corcoran has joined Cooley's tax practice as the first tax partner in its Boston office.

Celebrating 10 years since the firm launched in the city, Corcoran's arrival follows that of partner Ryan Sansom who joined in March. 

Corcoran has a lot of experience in private equity and venture finance tax matters. He advises on the federal and state income tax consequences of corporate and partnership mergers and divisions and represents leveraged buyout, venture capital, mezzanine and other alternative investment vehicles on formation and investment issues. 

Before joining Cooley, Corcoran was a partner at Osler, Hoskin & Harcourt for 12 years. He previously worked at Goodwin, Wilmer and was a partner at Testa. 

more across site & shared bottom lb ros

More from across our site

There is a shocking discrepancy between professional services firms’ parental leave packages. Those that fail to get with the times risk losing out in the war for talent
Winston Taylor is expected to launch in May 2026 with more than 1,400 lawyers across the US, UK, Europe, Latin America and the Middle East
They are alleging that leaked tax information ‘unfairly tarnished’ their business operations; in other news, Davis Polk and Eversheds Sutherland made key tax hires
Overall revenues for the combined UK and Swiss firm inched up 2% to £3.6 billion despite a ‘challenging market’
In the first of a two-part series, experts from Khaitan & Co dissect a highly anticipated Indian Supreme Court ruling that marks a decisive shift in India’s international tax jurisprudence
The OECD profile signals Brazil is no longer a jurisdiction where TP can be treated as a mechanical compliance exercise, one expert suggests, though another highlights 'significant concerns'
Libya’s often-overlooked stamp duty can halt payments and freeze contracts, making this quiet tax a decisive hurdle for foreign investors to clear, writes Salaheddin El Busefi
Eugena Cerny shares hard-earned lessons from tax automation projects and explains how to navigate internal roadblocks and miscommunications
The Clifford Chance and Hyatt cases collectively confirm a fundamental principle of international tax law: permanent establishment is a concept based on physical and territorial presence
Australian government minister Andrew Leigh reflects on the fallout of the scandal three years on and looks ahead to regulatory changes
Gift this article