leadership team
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Angel Martinez, President & Chief Executive Officer
Dr. Suzanne Beers, VP of Mission Decision Intelligence
Brian Wiig, Director of Operations
Angel Martinez is Co-Founder, Chairman, and Chief Executive Officer of Celeris Systems, Inc., bringing over 35 years of leadership and expertise in systems engineering, test and evaluation (T&E), and digital engineering for national security programs.
Since co-founding Celeris in 2005, Angel has led the company's growth as a Department of War engineering partner while spearheading the development of iRIS®, its flagship digital engineering platform. Under his leadership, Celeris has advanced solutions integrating requirements management, model-based systems engineering, verification, and AI-enabled decision support to improve mission assurance and efficiency.
Throughout his career, Angel has supported critical defense programs, including the Standard Missile-3 (SM-3), Ground-Based Interceptor (GBI), and GPS III satellite constellation. His expertise spans the systems engineering lifecycle, emphasizing requirements traceability, verification and validation, and digital transformation.
Angel earned a Bachelor of Science in Aerospace Engineering from the University of Southern California (USC). He remains committed to advancing AI-driven engineering innovation, strengthening national security capabilities, and positioning Celeris for growth across defense and emerging commercial markets. Connect on LinkedIn
Dr. Suzanne M. Beers leads the integration of mission engineering, systems engineering, test and evaluation (T&E), and AI-enabled decision support into Celeris Systems' flagship digital engineering platform, iRIS®. She brings decades of military and civilian leadership experience advancing mission-focused engineering, capability evaluation, and data-driven decision-making.
Prior to joining Celeris, Dr. Beers spent nearly 18 years at MITRE supporting the Department of Defense T&E community. She pioneered evaluation-based decision support methodologies, including the Decision Evaluation Framework (DEF) and Integrated Decision Support Key (IDSK), helping transform traditional test-centric approaches into decision-focused processes that improve mission outcomes.
A retired U.S. Air Force Colonel, Dr. Beers completed a distinguished 26-year military career spanning nuclear weapons integration, space ground systems, cruise missile operations, and operational test and analysis. Her service culminated as Commander of Air Force Operational Test and Evaluation Center (AFOTEC) Detachment 4.
Dr. Beers currently serves on the Department of the Air Force Scientific Advisory Board, contributing to studies addressing critical operational, technological, and strategic challenges facing the Air and Space Forces. Connect on LinkedIn
Brian Wiig serves as Director of Operations at Celeris Systems, Inc., bringing more than 20 years of experience in business operations, federal government contracting, and organizational management. Since joining Celeris in 2006, he has played an integral role in supporting the company's growth, operational efficiency, and successful execution of Department of Defense contracts.
Working closely with executive leadership, Brian oversees critical business functions, including contract administration, regulatory compliance, human resources, financial operations, and business development support. His extensive experience with federal acquisition regulations, government contracting requirements, and proposal development helps ensure Celeris maintains the operational discipline necessary to support complex defense programs.
Throughout his tenure, Brian has contributed to strengthening the company's business infrastructure, streamlining internal processes, and supporting strategic growth initiatives while maintaining a strong emphasis on accountability and regulatory compliance.
Brian holds a bachelor's degree in Legal Studies from the University of La Verne. Combining his legal education with extensive practical experience in federal contracting, he brings a disciplined, solutions-oriented approach to operational leadership and remains committed to Celeris' long-term success. Connect on LinkedIn
Heather Greife, Chief Financial Officer
Heather Greife serves as Chief Financial Officer of Celeris Systems, Inc., bringing more than 20 years of accounting and financial management experience, with expertise in federal government contracting. She provides financial leadership, supporting financial planning, contract performance, regulatory compliance, and Celeris’ growth.
Working with executive and operational leadership, Heather oversees the company’s financial strategy and ensures financial decisions align with contract requirements and Celeris’ long-term objectives. Her expertise includes budgeting and forecasting, financial reporting, indirect rate management, government contract accounting, and compliance with federal contracting requirements. Throughout her career, Heather has worked with government contractors at various stages of growth, giving her a broad perspective on the financial and operational challenges facing companies in the federal marketplace. She brings a practical, solutions-oriented approach to financial management, emphasizing scalable processes, strengthening financial visibility, and providing leadership with the information needed to make informed business decisions.
Heather has been a Certified Public Accountant since 2009 and earned a Bachelor of Science in Business Economics with an emphasis in Accounting from the University of California, Santa Barbara. She brings a combination of technical accounting expertise, government contracting experience, and strategic financial leadership to support Celeris’ continued growth and mission. Connect on LinkedIn