McKesson’s former head of tax joins Vertex

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


McKesson’s former head of tax joins Vertex

Vertex, the corporate enterprise tax software and services provider, has hired an executive with more than 30 years experience as its new chief taxation officer.

William “Bill” Brennan was formerly vice president of tax for McKesson Corporation, a Fortune 500 corporation that develops and sells healthcare services and information technology. He has also had stints as director of taxes for GE Capital, the world’s largest non-bank financial institution, Con-Way, a freight and logistics company, and MagneTek, a digital power and motion control systems supplier. He is a certified public accountant who has practised at Deloitte and Ernst & Young.

His new company says Brennan “will provide insight and thought leadership” around tax department operations, global tax regulations and policies, and emerging tax industry trends, and will advise Vertex’s board of directors and senior management on the development of the company’s corporate enterprise tax solutions under Vertex® Enterprise.

more across site & shared bottom lb ros

More from across our site

The UAE accounted for most Middle East promotions and new rankings, as A&M Tax, Baker McKenzie, Dhruva Consultants and DLA Piper breached the top tier
Spanish-headquartered multinationals lead on reporting quality, while US and Swiss groups lag in the Fair Tax Foundation’s expanded analysis
Former IRS commissioner Danny Werfel joins ITR for a must-listen conversation spanning his time leading the agency, his AI risk framework, and the future of the OECD
Tax and legal services was PwC’s fastest-growing business line last year, helping to put the firm back on a par with its big four rivals
Ex-EY and Hourani & Partners leader Zain Satardien is using flexible staffing and AI-enabled systems to test a leaner model for specialist legal and tax advice
The big four firm is rightfully prioritising transparency and accountability as it seeks to rebuild from its scandal, but a glaring structural issue remains
A recent hiring flurry has taken the firm’s number of partner appointments this year to 121 and put it on track to hit 160 partner target early
The move brings specialist tax and litigation capability to EY as it seeks to close the gap on Baker McKenzie and Venezuela’s leading local firms
The industry’s response to AI requires an unfamiliar ingredient as firms battle to shape their futures
The ambitious big four challenger firm has also appointed ex-RSM partner Brad Ashton to build out its customs and global trade practice
Gift this article