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

As global capability centres use AI to deliver services, MNEs face a fresh wave of PE and TP exposure that their existing playbooks weren't built for
The deal for Comtax hands Ryan immediate scale in Brazil, with a near-70-strong team serving clients from São Paulo
The arrivals of Julio Castro and Adam Blakemore mean the firm has added six tax partners to its global practice since the start of 2025
Tax authorities have gained unprecedented transparency through CbCR, but a new study suggests they may not be looking in the right places
The future chief tax officer will be judged not only on compliance, but on their ability to harness data, technology and AI to support strategic decision-making
More than 200 tier promotions reshaped this year's European rankings as several international firms strengthened their positions in key tax markets
Ryosuke Takemura, OECD policy adviser, countered that the organisation’s role is ‘not to solve these issues one by one’ but to prevent tax disputes in general
Awards
ITR is delighted to reveal all the shortlisted nominees for the 2026 Asia-Pacific Tax Awards
Monica Erasmus-Koen and her Taxtimbre team will be responsible for building the firm’s TP capability in the competitive Netherlands market
Haynes Boone’s new London partner, Alexandra Ueno-Park, argues that one-size-fits-all policies, billable-hour targets and outdated networking expectations can hold talent back
Gift this article