Capitol Hill veteran George Callas joins Steptoe & Johnson

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

Copyright © Legal Benchmarking Limited and its affiliated companies 2025

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

Capitol Hill veteran George Callas joins Steptoe & Johnson

People Thumbnail

George Callas has joined Steptoe & Johnson as managing director in the firm’s Washington DC office.



Callas will serve in the firm’s government affairs and public policy and tax groups. Callas is a Capitol Hill veteran who spent 15 years working on tax issues at the committee level and for the Republican leadership.

Prior to joining Steptoe & Johnson, he was a senior tax counsel to Speaker of the House Paul Ryan and among the chief architects of the Tax Cuts and Jobs Act (TCJA) legislated in December 2017. In this role, Callas was one of the leading negotiators in getting the tax bill through Congress.

Speaker Ryan has said about Callas: "He laid the groundwork for our eventual success with his early work on draft reform legislation while at the Ways and Means Committee, and he drove us over the finish line as my senior tax counsel in the Speaker’s Office."

Steptoe & Johnson expects Callas to provide great value to clients, from large multinational corporations to trade associations, in navigating the new US tax laws, which are still being analysed by tax professionals.



more across site & shared bottom lb ros

More from across our site

The EU has seemingly capitulated to the US’s ‘side-by-side’ demands. This may be a win for the US, but the uncertainty has only just begun for pillar two
The £7.4m buyout marks MHA’s latest acquisition since listing on the London Stock Exchange earlier this year
ITR’s most prolific stories of the year charted public pillar two spats, the continued fallout from the PwC Australia tax leaks scandal, and a headline tax fraud trial
The climbdowns pave the way for a side-by-side deal to be concluded this week, as per the US Treasury secretary’s expectation; in other news, Taft added a 10-partner tax team
A vote to be held in 2026 could create Hogan Lovells Cadwalader, a $3.6bn giant with 3,100 lawyers across the Americas, EMEA and Asia Pacific
Foreign companies operating in Libya face source-based taxation even without a local presence. Multinationals must understand compliance obligations, withholding risks, and treaty relief to avoid costly surprises
Hotel La Tour had argued that VAT should be recoverable as a result of proceeds being used for a taxable business activity
Tax professionals are still going to be needed, but AI will make it easier than starting from zero, EY’s global tax disputes leader Luis Coronado tells ITR
AI and assisting clients with navigating global tax reform contributed to the uptick in turnover, the firm said
In a post on X, Scott Bessent urged dissenting countries to the US/OECD side-by-side arrangement to ‘join the consensus’ to get a deal over the line
Gift this article