People / Harrison C. Costello

Person · Senate

Harrison C.
Costello

POLICY ADVISOROffice of the Senate Republican Leader

Policy Advisor in the Office of the Senate Majority Leader John Thune, focusing on transportation, energy, natural resources, and environmental policy. Previously served as Senior Legislative Assistant to Senator John Thune for more than eight years, specializing in transportation, infrastructure, supply chain, and emerging technology policy including artificial intelligence, autonomous vehicles, and unmanned aircraft systems. Currently Vice President, Global Government Affairs at Airlines for America.

Last full-year salary

$155,680

Calendar year 2025 · summed across all roles

Career tenure

9.4y

6 roles tracked

Sponsored trips

0

$0 total

Career earnings

$850,634

Chapter I

Compensation Timeline

Summed annual salary across all tracked roles.

Preparing salary timeline...

Chapter II

Employment History

Roles are merged across compensation filings.

POLICY ADVISOR
Senate
Jan 3, 2025 to Jan 30, 2026
SENIOR LEGISLATIVE ASSISTANT
Office of Senator John Thune
forRJohn R. Thune · Republican · South Dakota
Senate
Apr 1, 2021 to Jan 2, 2025
LEGISLATIVE ASSISTANT
Office of Senator John Thune
forRJohn R. Thune · Republican · South Dakota
Senate
Jan 1, 2019 to Mar 31, 2021
PROFESSIONAL STAFF
Senate
Apr 1, 2018 to Dec 31, 2018
RESEARCH ASSISTANT
Senate
Apr 1, 2017 to Mar 31, 2018
STAFF ASSISTANT
Senate
Aug 22, 2016 to Mar 31, 2017

Chapter III

Earlier career

Prior roles per public sources. May overlap with employment records based on salary filings above.

Senior Legislative Assistant
Office of Senator John Thune

Chapter IV

Sponsored Travel

No disclosed trips yet.