Meet Your Executive Team

Mark Swenson

Deputy State Treasurer Arizona

Mark Swenson first joined the Treasurer’s Office in January 2007. In his role as Deputy, Mark represents the Office in the Treasurer’s absence and oversees and directs several departments including Investment Management, Investment Accounting, AZ529 Plan, Legal, Government Relations and Communications. Mark’s Departments are responsible for investing and accounting for about $23 billion in investments and interacting with local governments, the Legislature and the general public. Mark has held senior executive positions for elected officials in state government for more than 27 years, including five State Treasurers, three Senate Presidents, and five Senate Majority Leaders. Mark is a graduate of the University of Arizona.

Jackie Harding

Deputy State Treasurer Operations Arizona

Jackie Harding first joined the State of Arizona in October 2014 in the General Accounting Office of the Arizona Department of Administration. She began serving in the Banking Division of the Treasurer’s Office in November 2016 helping state agencies become more efficient in making and receiving payments to the Treasury. In October 2017, Jackie was promoted to Banking Manager for State Agency banking services, which include assisting agencies in establishing and accurately maintaining their account with the Treasury. She oversees the daily operations of Treasury Banking staff and uses her knowledge of the Arizona statewide accounting system to help automate and improve Treasury banking procedures. In November 2018, Jackie became the Assistant Deputy Treasurer. Prior to her service to the State of Arizona, she spent more than 21 years in retail banking. Jackie is an Arizona native and graduate of Arizona State University.

Jeff Kros

Assistant Deputy Treasurer for Legal and Government Affairs

Jeff Kros joined the Treasurer’s Office in January 2023 as the Assistant Deputy Treasurer for legal and government affairs for the Treasurer’s Office. He brings over 24 years of governmental work experience to the Arizona Treasury team. His extensive background includes serving as a political attorney, advisor, lobbyist and consultant at the local, state and federal level. Jeff joined the Arizona Treasurer’s Office from the Arizona State Senate, where he served as the Special Counsel to the Majority. Jeff serves as the in-house counsel to the Arizona Treasurer’s Office, monitors legislation and serves as the office's legislative consultant and liaison. Jeff obtained his Bachelor's degree and Juris Doctor degree from Creighton University.

Jeffrey Ong

Jeffrey Ong joined the Treasurer’s Office in January 2022 as the AZ529 Plan Administrator. He oversees the $2 billion AZ529, Arizona's Education Savings Plan which helps thousands of Arizona families save for college, career and technical education. Before coming to the Treasurer’s Office, Jeffrey spent nine years serving in various roles at the Arizona State Senate and most recently served as the nonpartisan Research Analyst for a number of legislative committees, including Government, Higher Education and Education. Jeffrey is an Arizona native and graduate of Arizona State University.

AZ529 Plan Administrator

Alyssa Koury

Alyssa Koury joined the Treasurer’s Office in May 2022 as the Public Information Officer. She serves as the liaison between the Treasurer’s Office and the public, including media and constituents. Before coming to the Treasurer’s Office, Alyssa held internships at the Arizona Ombudsman - Citizens' Aide Office and the Arizona State Senate. Alyssa is an Arizona native and graduate of Arizona State University.