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 2026

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

Capitol Hill veteran George Callas joins Steptoe & Johnson

people move 2 big

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.

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 legislated in December 2017.

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. 

Callas is a Capitol Hill veteran who spent 15 years working on tax issues at the committee level and for Republican leadership.

The firm expects Callas to provide great value to clients, from large multinational corporations to trade associations, in navigating the new US tax laws.



more across site & shared bottom lb ros

More from across our site

The UK has confirmed its approach to the OECD’s side-by-side deal, but US-parented groups may find pillar two compliance remains far from straightforward
Fragmented pillar two taxation and increased use of AI by tax authorities have left clients fearful of heightened disputes exposure
Grant Thornton Advisors’ latest acquisition has produced the fifth-largest US advisory firm by revenue, but there’s still a clear gulf between it and the big four
Crowe joins Grant Thornton, WTS and Ryan in attracting PE investment, suggesting that dealmakers remain bullish on the tax advisory sector
HMRC expects advisers to meet ever-higher compliance criteria. After 24 consecutive qualified audit opinions, many will ask whether HMRC should hold itself to the same standards
The purchase of Marosa represents the second major tax tech consolidation this week, raising questions of a broader industry trend
Peru’s approach to TP is increasingly at odds with OECD-style profitability policies, exposing multinational groups to asymmetric tax adjustments
Hany Elnaggar examines how the region's legacy economic substance regimes and the OECD's pillar two framework are converging on the same underlying test
The deals for TP Accurate and Intra Pricing Solutions will enhance Alphatax’s ability to support clients with the full TP lifecycle, the tax tech provider claimed
The DS Advocates partner discusses career reinvention, tax disputes and why advisory and litigation experience should complement one another
Gift this article