Kyle Nevins

Partner

“Understanding what makes members tick isn’t an exact science, but Kyle Nevins spent more than a decade on Capitol Hill honing his skills to do just that as a senior staffer in Republican House leadership.”
  • Former top aide to the Congressional Leadership
  • Deep expertise in the legislative process, with a focus on the U.S. House of Representatives
  • Extensive Executive Branch engagement experience
  • Author of Inside Congress: A Guide for Navigating the Politics of the House and Senate Floors
  • Guest lecturer at The Brookings Institute
  • Board Member of the Frank Batten School of Leadership and Public Policy and the Center for Effective Lawmaking

Kyle Nevins is a seasoned former top aide to the House Republican Leadership with extensive experience in the process and politics of the U.S. Congress.  He specializes in a wide variety of business community and advocacy issues and has been recognized for his government affairs work by Politico Magazine as one of “50 Politicos to Watch” and The Hill as one of Washington’s “Top Lobbyists.”  Prior to co-founding Harbinger Strategies, Kyle spent two years as Principal at Capitol Counsel.

Kyle’s congressional career spanned over a decade in the U.S. House, serving as Deputy Chief of Staff to then-Majority Leader Eric Cantor (R-VA), as well as Director of Floor Operations to then-Republican Whip Roy Blunt (R-MO).  Kyle helped lead the House Republican vote-counting operation throughout the 2000s, influencing key policy decisions during both the Bush and Obama Administrations.  Following Republicans retaking of the majority in 2011, Kyle oversaw House committee and floor activity, guiding the chamber’s legislative strategy on impactful policy accomplishments, including trade agreements, the JOBS Act, and the so-called “fiscal cliff.”  His work on Capitol Hill was recognized in National Journal, Politico, Roll Call, and The Hill.

In 2011, Kyle helped establish the modern House of Representatives’ calendar and legislative schedule, instituting reforms that both parties have adhered to since.  Kyle testified before the House Select Committee on the Modernization of Congress in 2019, providing the committee with insight into the legislative scheduling process.

Kyle sits on the Advisory Board of the Frank Batten School of Leadership and Public Policy at the University of Virginia, as well as the Center for Effective Lawmaking (CEL), a joint research initiative of the University of Virginia and Vanderbilt University.  He lectures on the House’s policymaking and vote-counting process for The Brookings Institute and has written on congressional institutional reforms in The Federalist Society.

Kyle is a 2002 graduate of Duke University and studied at University College London.  He and his wife, Kristan King Nevins, have three children and live in Washington, D.C.

John O’Neill

Partner

“…[John O’Neill] has quickly established himself as the number one tax lobbyist on the Republican side, a major fundraiser and a policy guru.”
  • Senior staff and counsel to the Leadership and committees of the U.S. Senate
  • Deep expertise in corporate tax and pension policy, banking and financial services, and intellectual property
  • Recognized coalition-building experience in health care and consumer advocacy
  • Former partner and practicing attorney at Venable LLP

John O’Neill has nearly three decades of experience in federal government affairs and law practice.  Prior to co-founding Harbinger Strategies, John served as Partner at various lobbying practices, including Capitol Counsel and Ogilvy Government Relations.

On Capitol Hill, John served on both the Senate Republican Leadership staff under former Senator Trent Lott (R-MS) and the staff of the Senate Finance Committee under Chairman Chuck Grassley (R-IA).

During his tenure with Senate Republican leadership, he was Policy Director and Counsel in the Office of the Senate Republican Whip Trent Lott.  In the Whip Office, John assisted in the development and coordination of the Senate Leadership floor strategy with respect to all legislation considered by the United States Senate.  John supported Senator Lott’s efforts as Senate Republican Whip by providing advice and counsel on policy matters and legislation before the Senate.  He also worked closely with Senate Committee and Member offices in developing legislative and policy initiatives, as well as with senior White House officials and House Leadership offices.

Prior to his service in the Republican Whip Office, John served as Tax Counsel to the U.S. Senate Committee on Finance under Chairman Charles Grassley. During his time at the Finance Committee, John played a central role in the enactment of several major pieces of tax legislation affecting corporate tax law, pension reform, international tax reform, energy tax policy, and the taxation of health care and other employee benefits.

Earlier in his career, John was in private law practice, including as a partner in the firm of Venable LLP.  John is a frequent speaker and lecturer on public policy issues, and he has authored a number of articles in professional and scholarly publications.

John received a B.A. from Skidmore College in 1994 and a law degree from Georgetown University Law Center in 1999.

Parker Hamilton Poling

Partner

“As my Chief of Staff and most trusted advisor for more than a decade, I could always count on Parker to provide sound and honest guidance... Parker is a tremendous addition to Harbinger's impressive team.”
  • Seasoned professional with 20 years of senior staff experience at the highest levels of Congress, the Executive Branch, and political campaign organizations
  • Executive Director of the National Republican Congressional Committee (NRCC) and architect of the heralded 2020 House Republican election strategy
  • Former Chief of Staff to then-Chief Deputy Whip and current House Financial Services Committee Ranking Member, Patrick McHenry (R-NC)
  • Juris Doctor, The George Washington University

Parker Hamilton Poling has a track record of success at the highest levels of government and politics.  She has deep and broad relationships across the U.S. House and Senate and was recognized as one of Politico Playbook’s “Women to Watch.”

Prior to joining Harbinger Strategies in 2021, Parker served as the Executive Director of the NRCC.  During the 2020 election cycle, she and the NRCC defied expectations, flipping control of 15 congressional districts and adding historic numbers of women and minorities to the ranks of House Republicans.

From 2007-2018, Parker served as Chief of Staff to Congressman Patrick McHenry (R-NC), first in his personal office and then in the Office of the Chief Deputy Whip.  As Chief of Staff, Parker guided McHenry’s ascension from the rank-and-file to Leadership’s top deputy vote counter, followed by his appointment as Ranking Member of the House Financial Services Committee.

Parker has a deep substantive knowledge of the banking and financial services sector, as well as vote-counting and coalition-building.  As a senior member of the House Republican whip operation, Parker helped deliver key policy victories, including the Tax Cuts and Jobs Act, 21st Century Cures, Trade Promotion Authority, and health care reform.

Prior to her time in Congress, Parker was Assistant to the Director of Media Affairs in the White House during the George W. Bush Administration.  She has been the subject of profiles in the Washington Post Magazine, Roll Call, and Brown Alumni Monthly.

A native of Saratoga Springs, New York, Parker is a graduate of Emma Willard School, Brown University, and The George Washington University Law School.  She served as Executive Director of the College Republican National Committee from 1999 to 2001.

Parker lives in Washington, D.C. with her husband Todd and their two daughters, Barrett and Eliza, and bulldog, Clementine.  She is a member of Capitol Hill Presbyterian Church and serves on the Alumni Association Council of Emma Willard School.

Manny Rossman

Partner

“Manny built a highly effective whip organization. At the same time, he developed countless relationships with other Senate leadership offices, with House leadership offices, and with the administration that to this day facilitate the smooth operation of the entire legislative process.”
  • Former top aide to Senate Republican Leadership specializing in tax policy, legislative strategy, and Senate procedure
  • Deep expertise in legislative and regulatory policy matters, including financial services, health care, transportation, and international trade
  • Designs and implements winning strategies for a diverse group of Fortune 100 companies and major business trade associations
  • Extensive experience in analyzing and articulating legislative and regulatory risk and opportunities
  • Recognized by a variety of major publications for legislative expertise

Manny Rossman is a Capitol Hill veteran with two decades of experience in the U.S. Senate and House of Representatives, and in representing a diverse group of companies and trade association interests before Congress and the Administration.  Prior to co-founding Harbinger Strategies, Manny was Principal in the Breaux-Lott Leadership Group, a subsidiary of Squire Patton Boggs LLP.

During his congressional staff career, Manny served as Chief of Staff in the Office of the Senate Republican Whip, first for Senator Trent Lott (R-MS), and then for Senator Jon Kyl (R-AZ).  As Chief of Staff, he was the lead advisor to the Whip and responsible for formulating strategy, building support, and implementing the legislative priorities of a diverse caucus.  Manny directed a staff engaged in vote counting, policy formation, external communications, and Senate floor activities.  Manny also led outreach from the Whip office to all Senate and House Leadership offices, committees and Member offices, and to the Bush and Obama Administrations.

Before his Chief of Staff appointment, Manny focused on the legislative activities of the Senate Finance Committee for Senator Lott, playing a leading role in shaping major tax, international trade, health care, energy, and pension legislation before the committee and the Senate, including the Gulf Opportunity Zone Act, the Dominican Republic-Central America Free Trade Agreement, and the Tax Increase Prevention and Reconciliation Act.

Prior to that, Manny served as Legislative Director to Congressman Phil Crane (R-IL), then-Chairman of the House Ways & Means Trade Subcommittee, during which time he contributed to numerous tax and international trade bills, including the American Jobs Creation Act as well as free trade agreements with Chile, Singapore and Australia.  Manny began his career on Capitol Hill while in college, working for Congressman Bill Archer (R-TX), then-Chairman of the House Ways & Means Committee.

Manny’s policy expertise, knowledge of Senate floor procedure, and legislative acumen have been recognized in publications including the National Journal, the Washington Post, The Hill, Politico and Roll Call newspaper, which named him a “Fabulous 50” staffer on Capitol Hill citing his legislative expertise, ability to drive results, and access to key lawmakers.  He is a graduate of Colgate University as well as the University of Pennsylvania School of Law, and resides in McLean, Virginia with his family.

Jonathan Slemrod

Partner

“Jonny is one of the best policy minds in Washington and was a key member of my staff. His experience in multiple Senate offices and the Office of Management and Budget gives him a unique ability to translate policy to results.”
  • Former advisor to Senate Republican Leadership, Senator John Cornyn (R-TX), and Senator Marco Rubio (R-FL)
  • Served as a top aide to the White House Office of Management and Budget (OMB) and Consumer Financial Protection Bureau (CFPB)
  • Deep expertise in budget and appropriations, financial services, tax, trade, and health care policy, as well as Congressional committee and floor procedure/process
  • Expert in coalition building, management, and advocacy efforts

Jonathan Slemrod is a seasoned political operative who helps clients navigate complex policy issues including budget/appropriations, tax, and financial services.  He served as a top advisor at the Office of Management and Budget (OMB), for Senate Republican Leadership, House and Senate Republicans, and on a competitive presidential campaign.  He was named as a “Top Lobbyist” by The Hill newspaper in 2019 and 2020.  Jonathan is an expert in coalition building and management, as well as campaign-oriented advocacy efforts, helping companies and trade associations succeed through unconventional and effective means.

From 2017-2018, Jonathan served as Associate Director for Legislative Affairs at the Office of Management and Budget (OMB).  In this role, he was OMB’s lead liaison to Congress during bipartisan negotiations on government funding and authorizing issues.  He worked closely with Republican and Democratic Leadership, committees, Members of Congress, numerous White House offices, and Executive Branch agencies to craft and communicate OMB’s official position on legislation and regulation.

Concurrent with his role at OMB, Jonathan was Special Advisor to the Acting Director of the Consumer Financial Protection Bureau (CFPB), helping the Bureau’s leadership navigate its committees of jurisdiction.  Jonathan also managed the successful Senate confirmation of the permanent Director of the CFPB.

Previously, Jonathan served on the Leadership staff of Majority Whip Senator John Cornyn (R-TX), advising the Whip Team on budget, tax, and trade policy and managing outreach with outside organizations, including successful coalition building efforts on key issues for the business community.  He also worked on the Leadership staff of Minority Whip Senator Jon Kyl (R-AZ).

Outside of Congress, Jonathan worked as Policy Director for the Marco Rubio for President campaign, acting as the candidate’s top policy advisor and managing an extensive network of policy surrogates.  Earlier in his career, Jonathan was Legislative Assistant to Senator Rubio, handling economic issues.

Jonathan is a native of Ann Arbor, Michigan, and a graduate of the University of Michigan.

Steve Stombres

Partner

“Mr. Stombres has been part of the Republican brain trust for most of the legislative fights in recent years, serving at Mr. Cantor’s side as the lawmaker rose to be second in command behind Speaker John A. Boehner. Mr. Stombres is part of a small group of Republican aides who plot out the party’s tactics on taxes, spending, foreign affairs, social issues and jobs.”
  • Second highest ranking staffer in the U.S. House of Representatives with 21 years of congressional experience
  • Former Chief of Staff to House Majority Leader, Republican Whip, and Chief Deputy Whip Eric Cantor
  • In-depth policy expertise in defense, foreign affairs, financial services, tax, and trade
  • Mayor of Fairfax from 2016-2017 and Fairfax City Councilman from 2008-2014
  • Retired 20 year Intelligence Officer in the U.S. Army Reserve

Steve Stombres is a knowledgeable and effective advocate for Harbinger’s clients who benefit from his diverse career of service on Capitol Hill, as an elected official, and as an officer in the U.S. Army.

During his time as a Leadership Chief of Staff, Steve was a trusted negotiator for House Republicans on several high-profile legislative battles.  He was personally involved in resolution of the debt limit crisis of 2011, the fiscal cliff of 2012, and the government shutdown of 2013.  Steve’s role in the 2011 debt limit discussions were described in detail in Bob Woodward’s best-selling book, The Price of Politics.  Steve appeared on Roll Call’s “Fabulous 50” list of the most influential staffers on the Hill for over ten years and was described by The New York Times as “one of the most powerful Republican aides on Capitol Hill.”

In addition to his time as Chief of Staff to the offices of the Chief Deputy Whip, the Republican Whip, and the Majority Leader, Steve served as personal office Chief of Staff to Rep. Eric Cantor, as well as various policy positions throughout the House and its committees.

Outside of Congress, Steve was elected to the Fairfax City Council in 2008, serving three consecutive terms before retiring in 2014.  In 2016, Steve was sworn in as the 11th Mayor of the City of Fairfax and served until February of 2017.

Steve’s government service also includes a distinguished military intelligence career.  Steve first enlisted in the U.S. Army Reserve in 1987 and was a 1995 graduate of Officer Candidate School (OCS).  Upon receiving his commission, he served as an intelligence officer and was assigned to the Defense Intelligence Agency.  In 2003, Mr. Stombres was mobilized in support of Operation Iraqi Freedom and served on the Joint Chiefs of Staff as an Iraq Analyst for the Iraq Intelligence Task Force.  He retired from the Army Reserve in 2009.

Steve graduated from the Virginia Polytechnic Institute in 1993 and holds a B.A. in History.  He and his wife Kristen reside in Fairfax, Virginia with their children Katie, Ellie, and Jimmy.

A team of professionals, dedicated to providing world-class results.

Each partner of the Harbinger Strategies team has been involved at the highest levels of decision-making in Congress, the Executive Branch, and national political campaigns.  Relying on our deep experience, we deliver results for our clients in any political environment.

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