The Team

At Orbital Sentry, we’re building systems that don’t exist yet—because the risks our world faces won’t be solved by what already does. Our team brings together decades of experience across space systems engineering, deep tech, AI, and enterprise go-to-market. We’ve launched satellites, delivered national-security programs, and brought breakthrough technologies to market in some of the most demanding industries on Earth.

What unites us is a shared belief: solving meaningful challenges requires persistence, wisdom, and comfort in managing complexity. We’re here to build the infrastructure that helps communities, first responders, defense & intelligence agencies, and commercial organizations act faster when it matters most.

Meet the team designing the future of persistent Earth awareness.

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  • Co-founder and CTO

    Keith Coste has more than three decades of experience delivering advanced capabilities for national security, civil, and commercial space missions. He earned a Bachelor of Science in Aerospace Engineering from the University of Southern California in 1992 and a Master of Science in Aerospace Engineering from Purdue University. Keith began his career at Hughes Space and Communications as a propulsion engineer, where he contributed flight hardware to dozens of Department of Defense, NASA, and commercial missions throughout the 1990s. His work has spanned the full mission lifecycle, including system architecture, hardware development and qualification, procurement, integration, launch, and on-orbit operations. He later spent time at The Aerospace Corporation supporting major U.S. aerospace programs, with a focus on national security systems, CubeSat technologies, and launch vehicle development. Keith later joined NASA’s Jet Propulsion Laboratory, where he spent 21 years leading Department of Defense programs and transitioning into optical systems. At JPL, helped develop multiple patents and optical technologies and served as a Project Manager and Chief Architect for National Security Space, responsible for the architecture and delivery of significant defense system capabilities. Following his retirement from JPL, Keith founded Sensitic Technologies, focused on the development of novel terrestrial and space-based sensor systems, and co-founded Orbital Sentry, where he provides technical leadership leveraging his extensive space systems expertise.

  • Co-founder and CEO

    Mark Keremedjiev loves moonshot programs and has spent the last 15 years leading complex, multi-disciplinary efforts from concept stage up through successful commercial operations. He co-founded Orbital Sentry and leads the company as CEO. He has a proven track record of delivering bold programs including the Tanager-1 mission at Planet as well as a range of space capabilities across the US Defense and Intelligence Communities. Mark excels at bringing together effective teams and has a collaborative and trusting leadership style that maintains high morale and yields outcomes. Mark also has deep technical expertise in space systems, electro-optics, infrared imaging, and geospatial analysis rooted in a PhD in astrophysics from the University of Florida. He did his undergraduate astronomy studies at Carl Sagan’s old home (Cornell University) where he graduated with honors. Mark is a proud father and spends the balance of his time with his family in Washington, DC. Given the chance, he will gladly get in some skiing or run a half marathon.

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  • Co-Founder and CBO

    Elizabeth Foughty is a go-to-market strategist who has spent her career helping deep-tech teams turn breakthrough capabilities into category-defining businesses. At Orbital Sentry, she leads commercial strategy, enterprise partnerships, and market development. Elizabeth has built GTM organizations from the ground up, consistently closing complex enterprise deals and partnerships with Fortune 100 companies. Her background spans NASA, RMS (Now Moody's RMS), CAPE Analytics (Now Moody's), and Planet Labs, giving her a unique ability to connect space-borne data, AI, and real-world risk mitigation in ways that resonate with technical buyers and operational stakeholders alike. Her expertise includes high-stakes enterprise selling, positioning deep-tech products for regulated markets, and crafting commercial strategies that unlock both private and public value. She holds an MBA in Sustainable Management from Presidio Graduate School, and a BA from Boston University. Beyond Orbital Sentry, Elizabeth stays grounded (pun fully intended) through parenting, community work, and reading science fiction. She serves on the board of a local nonprofit and as the parent representation on her local elementary school council, a reflection of her conviction that meaningful change happens both in orbit and on the ground.

Our Board

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    Larry James

    Larry James, Lt Gen, USAF (Ret), Former Deputy Director and COO of NASA/JPL

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    Bill Keogh

    Former CEO Advisen, President Eqecat, Group Executive Client Development RMS

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    Cynthia Tsai

    President of the Montana Biosciences Alliance, CEO and Chairman of Healthquest