Sealevel Systems, Inc., a leading provider of rugged, industrial-grade computing and I/O solutions, proudly announces its 40th anniversary in 2026.
Explore
The Power of Reliability.
The Promise of Tomorrow.
Celebrating 40 years of rugged computing and industrial I/O innovation.
Forty Years Strong, and Forward.
For 40 years, Sealevel Systems has engineered rugged computing and industrial I/O solutions trusted in critical industries around the world. What began as a commitment to solving real-world challenges has grown into a legacy defined by reliability, long-term partnerships, and engineering excellence.
As we celebrate this milestone, we honor the people, progress, and persistence that shaped our journey while setting our sights on what comes next.
For four decades, we’ve stood on the same principles that have guided us
from our first design to the cutting edge of modern industrial technology.
Performance
Proven Over Time.
Reliability isn’t a feature, it’s our foundation.
For 40 years, Sealevel solutions have delivered dependable performance in environments
where failure isn’t an option. From rugged computing platforms to long-lifecycle industrial I/O, our systems are engineered to perform and endure.
More Capability,
Less Complexity.
Sealevel simplifies development by consolidating engineering, manufacturing, and support while designing platforms integrating computing and I/O. The result is reduced system complexity, fewer integration challenges, and a more efficient path from concept to deployment.
Connecting
What Matters Most.
Connectivity at Sealevel is built on more than technology, it’s built on relationships. For decades, we’ve partnered with customers, engineers, and integrators to connect systems, operations, and people through dependable, purpose-built solutions.
A Legacy 40 Years in the Making
From our earliest designs to today’s advanced platforms, every milestone reflects our commitment
to reliability, innovation, and the people behind the products.
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1986 Sealevel Founded to Create High-Reliability I/O for Critical Communications
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1987 Sealevel named South Carolina Manufacturer of the Year
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1994 Sealevel Awarded First Patent for Isochronous Data Communication System
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2000 Products Deployed in Space Through NASA Partnership
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2003 Sealevel Achieves ISO-9001:2000 Certification
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2004 Sealevel Adds Design and Manufacturing of Embedded Computers
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2005 Industry’s First RoHS-Compliant PCI RS-232/422/485/530 Board and RoHS-Compliant Low-Profile PCI Digital I/O Board
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2006 Sealevel Moves into New 52,000-Square-Foot Facility
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2010 Tom O'Hanlan Awarded Allan J. McDonald Entrepreneurship Award
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2011 Sealevel Installs State-of-the-Art SMT Line for In-House Manufacturing
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2018 Sealevel Achieves ISO 9001:2015 Certification
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2018 Tom O’Hanlan Honored with Outstanding Manufacturing Lifetime Service Award
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2022 Sealevel Recognized with South Carolina Transformation and Operational Excellence Award
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2025 Achieves Prestigious AS9100D Certification
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2026 Sealevel Celebrates 40 Year Anniversary
Trusted in Mission-Critical Environments
Across defense, aerospace, industrial automation, and beyond, Sealevel solutions support critical systems and
long-term programs that demand confidence and continuity.
Press and Media
Built by People
Who Make It Work
Behind every Sealevel solution is a team of engineers, technicians, and support professionals dedicated to getting it right. Their expertise, collaboration, and commitment power our innovation and strengthen the communities and industries we serve.
READY TO LEARN MORE?
Partner with Sealevel
For 40 years, Sealevel has supported engineers and organizations building systems that demand reliability and longevity. We look forward to partnering with you as you design, deploy, and scale what’s next.
