Leadership - Constellis

Terry Ryan joins Constellis as Chief Executive Officer following his tenure as lead director of Constellis.

Mr. Ryan has over 20 years of successful executive-level experience in the federal technical services market, including past service as CEO of Adroit Systems, VTG and Tenax Aerospace. He also held senior executive positions at SAIC, Mercury Systems and ManTech International, and he has advised past Directors of the CIA and DARPA on advanced technology issues. Mr. Ryan served many years in the federal government as the Director, Intelligence Surveillance and Reconnaissance Systems, Office of Secretary of Defense, Deputy Director, Defense Airborne Reconnaissance Office, and as a professional staff member on the United States Senate and House of Representatives Intelligence oversight committees. Mr. Ryan also served the United States as a Marine Corps infantry commander and intelligence officer.

Terry Ryan

Chief Executive Officer

As Chief Operating Officer (COO) of Constellis, Paul P. Donahue oversees the daily operations of the company.

Paul has 25 years of experience in the financial and operational management of government, public, private and private equity organizations. Previously, he served as treasurer and chief financial officer for Centerra, responsible for all financial operations. Paul became the COO in 2006, President in 2010 and CEO in 2012.

Paul Donahue

Chief Operating Officer & President, Global Security Services

Darin Cabral is the Chief Financial Officer of Constellis. As CFO, Darin is responsible for the oversight of all financial strategy and financial operations.

Darin is an experienced financial executive with a track record of delivering profitable growth across multiple business cycles. He brings nearly 30 years of experience leading domestic, international and global financial operations and M&A integrations operating in commercial, enterprise and government contracting environments. Prior to joining Constellis, Darin held senior leadership positions at Peraton, Perspecta, DXC Technology, Hewlett Packard Enterprise and Hewlett-Packard.

Darin Cabral

Chief Financial Officer

Olivia Fines is the Chief Legal and Compliance Officer at Constellis. Olivia oversees and directs all legal and regulatory compliance related matters, including litigation, investigations, contracts, corporate governance, health and safety, environmental, as well as ethics and internal audit functions. She also serves as the Company’s Corporate Secretary.

Prior to joining Constellis, Ms. Fines served as the Senior Vice President, Deputy General Counsel, and Chief Compliance Officer at Parsons Corporation, where she led and managed the International Trade Compliance Team, the FCPA Due Diligence Team, and the Global Ethics Program and Team.

Olivia Fines

Chief Legal, Risk & Compliance Officer

Marissa Holdorf is the Chief Human Resources Officer at Constellis. Marissa is the lead executive for all human resources functions and responsible for the development and implementation of strategy, structure, and processes. By focusing on the company’s most important asset – its people – she plays a vital role in Constellis’ global growth trajectory.

Marissa is an accomplished leader with over 20 years of experience optimizing HR programs, organizational structures, process technologies and systems to increase corporate value and create safe and productive work environments. Prior to joining Constellis, she was Vice President, Human Resources, Defense & Security at CAE. Marissa holds Bachelor of Business Administration (BBA) from the University of San Diego and earned her Master of Business Administration (MBA) from Ohio University.

Marissa Holdorf

Chief Human Resources Officer

Andrew Hartsog is the Executive Vice President of Mission Support Services, focused on technology and National Security.

He arrived at the company after a distinguished career at the Central Intelligence Agency (CIA) and previously served with U.S. Army Special Forces. Mr. Hartsog retired from CIA in 2023 as a Senior Intelligence Service (SIS) Executive after 23 years serving as a Paramilitary Operations Officer and Operations Officer with multiple assignments as a Chief of Station (COS), Chief of Operations (COPS) for a Special Activities and other leadership positions both overseas and at CIA headquarters for the Directorate of Operations (DO).

Andrew Hartsog

Executive Vice President, Mission Support Services

Executive Leadership