Leadership
Mark Greeley
Mark Greeley is President and Chief Executive Officer of Paragon Space Development Corporation, a leader in life-support and thermal control systems for space and extreme environments. With more than 36 years of aerospace and astronautical experience, he is recognized for disciplined execution, trusted leadership, and a steadfast commitment to operational excellence across complex, mission-critical programs.
Greeley has directed technically demanding efforts that have advanced human spaceflight, including the development of crewed space stations, next-generation spacesuits, and integrated life-support systems. His leadership spans program management, systems integration, corporate operations, and large-scale infrastructure, guiding organizations through transformation while maintaining precision, purpose, and accountability.
He began his career in the U.S. Air Force supporting high-altitude reconnaissance programs and later held senior leadership roles advancing the nation’s human spaceflight programs, including Artemis, the International Space Station, the Constellation Program, and the Space Shuttle Program.
Greeley leads with integrity, clarity, and a steady focus on building trusted teams that deliver. His approach reflects the values that define Paragon’s legacy of excellence, innovation, and reliability in enabling human exploration and survival in the most demanding environments.
Nina Grigsby
As Paragon’s Chief Financial Officer, Nina Grigsby brings over 30 years of experience to her management of the firm’s day-to-day financial transactions, strategic growth planning, reporting and analysis, auditing, contract compliance, and budgeting. Nina Grigsby brings extensive cross-sector leadership experience spanning financial management, information technology, and human resources administration, as well as nonprofit strategic planning and private equity investment portfolio management. She has supported both for-profit and nonprofit organizations, providing disciplined financial oversight, operational leadership, and strategic insight. Her breadth of experience enables effective governance, risk management, and long-term value creation at the executive and board level.
Over the course of her career, Nina has worked with companies to diversify their customer bases to increase revenue potential and introduced stronger accounting policies and procedures to better account for financial capacity and sustainability, inventory items, manufacturing processes, and product management and logistics. She continues to drive efforts to position Paragon for profitability, partnering with senior leadership to develop strategic plans for finance, budgeting, administration, and marketing.
David Romero
David Romero drives alignment across Engineering, Operations, Business Development, and Corporate Operations. He brings more than 30 years of leadership experience in commercial space, human spaceflight, and complex program management, supporting the commercial industry, Department of Defense, and major NASA programs. His expertise in life-support systems, engineering integration, and mission execution strengthens our organizational discipline and clarity. As Chief of Staff, David connects strategy to execution by aligning teams around shared priorities and reinforcing a strong, consistent operating rhythm.
Cid Escobedo
Cid Escobedo manages the Program Management Office at Paragon Space Development Corporation and is responsible for profitable business growth, contract execution, customer satisfaction, quality, cost, and delivery performance, program management training and development, phase gate reviews, and technology and system enhancements which support customer requirements.
Cid Escobedo possesses over thirty years in Program Management in the Aerospace & Defense, Healthcare / Life Sciences, Commercial, Automotive, Aftermarket Services and Optoelectronics sectors and has been employed by large and mid-sized EMS providers such as Xerox, OSI Systems, Celestica, Plexus, and Creation Technologies.
Cid is a certified Project Management Professional (PMP), Six Sigma Master Black Belt, and possesses two Bachelor’s of Science Degrees in Electronics Engineering and Instructional Systems Technology. Cid served in the United States Air Force for twelve years as an Airborne Electronics Master Technician.
Ron Wright
Ron Wright is responsible for fostering an environment of innovation and excellent technical performance while ensuring resources and engineering processes are in place to deliver products that support Paragon’s strategic business goals. During his tenure at Paragon, Ron has served as Chief Engineer and Program Manager for Paragon’s efforts on the HALO Program. In these roles, he has helped lead the Program to complete the Preliminary Design Review (PDR), the Critical Design Review (CDR), and begin transition into manufacturing.
Ron Wright brings over two decades of increasing responsibility in both technical and program leadership roles. His knowledge and background span most of the product life cycle including development through full-rate production and repair/upgrades of fielded assets. Prior to joining Paragon, Mr. Wright was a level three chief engineer at Raytheon Missile Systems (RMS) and brings over 20 years of experience from RMS. While at RMS, Ron received RMS Technical Honors and was documented as a co-author on a paper highlighting a Modular Antenna Control Architecture that was implemented on the NMT ACU design. Ron Wright holds a BS in Electrical Engineering from the University of Florida.
Thierry Carriere
Dr. Carriere has over 20 years of experience in Research and Development, Engineering and Technology Transition to commercial and government markets. Following his PhD in Chemical Engineering from the University of Massachusetts, he started his professional career at the United Technologies Research Center (UTRC) developing new industrial and military technologies for the company’s business units. In particular, he led the technical development and program management of innovations in the area of toxic gas sensing and fire suppression systems. After 8 years at UTRC, he joined ADA Technologies, a small technology incubation business as Director of Technology. In that capacity, he was responsible for capturing funding and leading technology development for ADA’s NASA and DOD customers. For the first five years, his main project was the research, engineering, implementation and qualification of a novel fine water mist fire suppression technology for the International Space Station. After the portable extinguishers were successfully delivered to the ISS, Dr. Carriere assumed the role of Vice President and oversaw all aspects of projects focused on a variety of critical defense areas including jet fighter fuel tank safety research for the Air Force, high-pressure scuba and ultra-safe battery enclosure products for the US Navy, and austere environment wearable sensors for the US Army. He joined Paragon in April 2021 following an 11-year tenure at ADA.
Norman Hahn
As Chief Engineer at Paragon Space Development Corporation, Mr. Hahn provides technical leadership and balanced oversight of the company’s emerging technologies. He holds a BS in Aerospace Engineering from Penn State and a MS in Mechanical Engineering from Rensselaer Polytechnic Institute.
During his 19+ years at Paragon, Mr. Hahn has served as Chief Engineer and/or technical lead for Paragon’s efforts on the Orion, Inspiration Mars and StratEx programs as well as Program Manager for the FLO1, Brine Processor Assembly and Sierra Space Radiator projects. He has also done extensive theoretical and experimental development of flow stagnation and established highly accurate parametric models of radiator performance and ATCS capability. Mr. Hahn has led the development of Paragon patented xRAD® radiator design from concept to successful proposal through to the delivery of flight hardware. Other duties have included management of the Systems Engineering and Integration team.
Mr. Hahn’s previous experience includes design, analysis and testing of turbomachinery incorporating fluid film bearings. In this work he developed complex models to predict bearing performance and aerodynamic thrust loads. In another position he managed a product development group responsible for designing and developing exhaust gas sensors for automotive applications.