Of Counsel
Wiley Rein LLP
Washington | Batimore, District of Columbia
Practice areas: Election Law & Government Ethics; Federal and State Lobbying Law; White Collar Criminal Defense; Congressional Investigations; Political Intelligence Regulation
Of Counsel at Wiley Rein LLP

Rob is a former Chief Counsel and Staff Director of the Senate and House ethics committees and a former federal prosecutor, with extensive trial, investigative, and advisory experience. He counsels a wide range of clients on congressional and other government ethics rules, lobbying rules and compliance, congressional investigations, and white collar defense matters. Rob regularly represents corporations, associations, and individuals – including congressional officials, other government officials, and candidates – in federal and state ethics advisory and investigative matters (including in connection with financial disclosure obligations), in internal investigations, and in prosecutions arising under campaign finance, fraud, public corruption, and other criminal laws.
Wiley Rein LLP
Washington | Batimore, District of Columbia
Practice areas: Election Law & Government Ethics; Federal and State Lobbying Law; White Collar Criminal Defense; Congressional Investigations; Political Intelligence Regulation
U.S. Senate, Select Committee on Ethics
(appointed)District of Columbia
U.S. House of Representatives, Committee On Standards of Official Conduct
(appointed)District of Columbia
U.S. Senate, Select Committee on Ethics
(appointed)District of Columbia
U.S. Department of Justice (DOJ), Public Integrity Section
(appointed)District of Columbia
U.S. Attorney’s Office
(appointed)District of Columbia
Securities and Exchange Commission (SEC), Division of Enforcement
(appointed)District of Columbia
May 2025
Regularly provides government ethics compliance counseling to corporations, associations, lobbying firms, public officials, candidates, nominees, and others, including regarding: conflicts of interest; post-government employment; gifts; federal financial disclosure. Regularly provides federal, state, and local lobbying law compliance counseling to corporations, associations, lobbying firms, advisory firms, and others. Represents Members and staff of the U.S. House of Representatives and U.S. Senate, and other individuals and organizations, in investigations by the House Office of Congressional Ethics (“OCE”), the House Committee on Ethics, and the Senate Select Committee on Ethics. Represented United States Senator in insider trading investigation by DOJ, SEC, and Senate Select Committee on Ethics. Represented individual and organizational witnesses in recent DOJ Special Counsel investigations and related congressional inquiries. Assists clients with responses to and appearances in connection with grand jury, DOJ, and state Attorney General investigations. In congressional investigations, represents corporations, associations, and individuals before committees and subcommittees of the U.S. House and Senate, including in responding to detailed requests for information and documents and in preparing corporate representatives and other individuals for interviews, depositions, and congressional testimony. Advises law firms, lobbying firms, advisory firms, and others on compliance with The Stop Trading on Congressional Knowledge (“STOCK”) Act.
Chambers USA
January 2024
Listed by Chambers USA as one of "America's Leading Lawyers for Business" in Political Law (2018-2024) and a "Recognized Practitioner" (2017) in Political Law
Washingtonian magazine
January 2011
Named one of Washington's "Best Lawyers" by Washingtonian magazine (2011)
Pratt's Government Contracting Law Report
February 2025
LinkWiley.law
December 2024
With the change of Presidential Administrations and with a new Congress, many current federal government officials and employees – whether elected, appointed, or hired – are exploring employment opportunities in the private sector. In their new positions, these officials and employees – particularly if they are coming from the Executive branch – will need to comply with an array of statutory and other restrictions, some of them specific to their former employing agency, on their post-government employment activities. Restrictions may apply, as well, to their activities in seeking, negotiating for, or agreeing to new employment. The burden of compliance does not fall only on the former official or employee: Private-sector employers hiring from the government may also have legal exposure if relevant requirements and restrictions are not observed. And remember: Violations of federal statutory post-employment restrictions may be punished as felony criminal offenses.
The Lobbying Manual: A Complete Guide to Federal Lobbying Law and Practice, Sixth Edition
November 2024
Robert L. Walker, of counsel in the Election Law & Government Ethics Practice, and associates Hannah Bingham and Hannah J. Miller are featured as authors in the 2024 edition of the American Bar Association’s Lobbying Manual. Walker and Bingham co-authored Chapter 26 of the manual, “Hiring from the Executive Branch: Restrictions on Post-Government Employment and on Seeking Employment,” while Walker and Miller co-authored Chapter 27 of the manual, “Hiring from Congress: Post-Employment and Employment Negotiation Restrictions on Members, Officers, and Employees of the U.S. House and Senate.”
Wiley.law
June 2024
Under new joint guidance issued by the U.S. House Committee on Ethics, Committee on House Administration, and Communications Standards Commission, Members of the U.S. House of Representatives may officially co-sponsor certain events with nonprofit entities. Specifically, in limited circumstances, individual Members (but not committees or Congressional Member Organizations) may now co-sponsor “constituent service events” with organizations qualified under §170(c) of the Internal Revenue Code (e.g., §501(c)(3) charitable organizations).
Wiley.law
May 2024
The U.S. Senate Select Committee on Ethics has issued a “Dear Colleague” Letter, and the U.S. House Committee on Ethics has issued a Pink Sheet advisory, reminding Members and staff of the rules applicable to attending events and receiving gifts during the course of the national party conventions. The Senate “Dear Colleague” also reminds Members, officers, and employees of the key rules governing their participation in campaign activity.
Wiley.law — PODCAST
April 2025
Hiring from or heading to the federal government? Don’t get tripped up by post-employment or conflict of interest rules. Wiley's Robert L. Walker breaks down the “revolving door” restrictions every organization should know – especially if you’re building out your government affairs team or have an employee entering public service.
PODCAST
June 2024
With the Republican and Democratic National Conventions only a few weeks away, Wiley's Rob Walker highlights important campaign finance and government ethics laws and rules, to ensure you and your organization's participation is both impactful and compliant.
Political Law Podcast — PODCAST
May 2023
Congressman George Santos was elected to the House of Representatives in November 2022, representing New York’s Third Congressional District. On May 10, 2023 he was arraigned in Federal District Court in Long Island, NY on a 13-count criminal indictment for allegedly defrauding donors, illegally obtaining unemployment benefits, and lying about his income and his assets on public financial disclosure forms. Why does the indictment cover only a small portion of what has been reported about Congressman Santos’s alleged wrongdoings? Listen as Election Law & Government Ethics attorneys Rob Walker and Caleb Burns discuss why the indictment is narrowly focused, how the U.S. Department of Justice (DOJ) will work to prove these charges, and more.
Political Law Podcast — PODCAST
July 2022
In this podcast, Wiley partner Carol Laham and of counsel Rob Walker discuss the ins and outs of the LD-203 Contribution Report. The LD-203 is due semi-annually with the next one due on August 1, 2022. The report requires all federally registered lobbyist firms, organizations, and self-employed individuals to disclose all details related to lobbying activity. With the deadline looming, Carol and Rob answer common questions about the report, break down the requirements, and dole out best practices for ensuring compliance.
Political Law Podcast — PODCAST
April 2022
Listen to Robert L. Walker, of counsel in Wiley’s Election Law and Government Ethics Practice and Kara M. Sacilotto, a partner in Wiley’s Government Contracts Practice, discuss “Hiring Individuals from the Government: What Post-Employment Looks Like.” This episode provides an overview of key legal, ethical, and practical pitfalls encountered from individuals and some of the unique issues government contractors face when hiring former government employees.