){kind=icon}
We apply scientific innovation and evidence-based research to engineer dynamic human-machine systems.
)
)
)
)
){kind=icon}
Our Company Values
At STI, our core values shape everything we do.
)
About Us
)
)
Our Mission
Our Vision
To create the most valuable human-machine interaction assessments and solutions that support safety and saving lives.
)
Empowering Performance and Safety in Complex Systems
At Systems Technology, Inc. (STI), we bridge the gap between complex systems and the human operators who control them. Since 1957, we have applied the principles of physics and mathematics to solve the toughest challenges in aerospace, defense, and healthcare. Our innovative solutions are at the heart of improving safety and efficiency in high-stakes environments.
Simulation Products
Advanced Solutions for Complex Training_
We offer a range of industry-leading simulation products designed to reduce costs and improve effectiveness. Our top solutions include:
PARASIM®: The global standard for parachute training, trusted for over three decades
STISIM Drive®: A redefined driving simulator for occupational therapy, clinical studies, and research
Specialized analytical software: Tailored tools for simulation, modeling complex systems, human assessment, flight sciences, and human-machine interaction
)
)
Unifying Expertise: Simplifying Complexity, Solving Challenges
At STI, we seamlessly integrate deep knowledge of dynamic systems theory with insights into complex machines and their operators. This synergy allows us to deliver exceptional value by simplifying complexity and solving seemingly overwhelming engineering problems.
Why Choose STI?
We are more than problem-solvers; we are visionaries. We see a future where aerospace, defense, and healthcare industries can push the boundaries of what is possible—without sacrificing safety. STI is committed to making that vision a reality through innovative human-machine systems and simulations.
)
GOVERNANCE
)
Sanjeev WeerasuriyaPresident and CEOSTI Employee-Owner since 2001Board Member since 2009
Sanjeev leads with a focus on growth, innovation, and employee ownership. Since joining STI, he has doubled revenue and earnings, restructured Simulation Products division and guided the company to 100% employee-ownership. His leadership continues to shape STI’s future through strategic, customer-focused solutions.
)
Chi-Ying Liang, Ph.D.Corporate SecretarySTI Employee-Owner since 2000Officer since 2018
Chi leads the PARASIM® product lifecycle at STI, driving market strategy and product development. As Vice President and Technical Director of STI’s Simulation Technology Team, he also guides a talented team of experts in supporting the company’s cutting-edge simulation products, ensuring excellence in both innovation and execution.
)
Bill HawfieldChairman, Board Member since
Bill Hawfield is a professional manager, business owner, and expert in board governance, having co-founded The Board Group (TBG), which helped owners realize over $3 billion in value. He has served on more than 40 boards, both fiduciary and advisory, in a wide variety of industries. He led Penguins to 130+ stores and served as President at General Mills. Bill is also the author of Game-Changing Advisory Boards and a sought-after speaker for Vistage.
)
Christopher BraunBoard Member
Christopher Braun is an experienced CEO with a proven track record in driving growth, building teams, and creating successful opportunities. With expertise ranging across industries including medical devices, healthcare, and industrial products, he specializes in strategic planning, market positioning, and optimizing global operations. Christopher brings extensive Fortune 500 and mid-market leadership experience to the table, focusing on innovation and customer-driven growth.
Our History
1950s
Founded by Duane T. Mcruer and Irving Ashkenas, pioneering human response research and laying the groundwork for modern flight control systems
)
1960s
Expanded into helicopter and VTOL handling qualities, developing NASA’s Critical Tracking Task and advanced landing systems
)
1970s
Advanced carrier landing, vibration, and Space Shuttle handling research while extending simulation expertise to ground vehicle dynamics
)
1980s
Defined modern flying qualities criteria and launched industry-leading simulation platforms, including PARASIM®, the DOT/FHWA highway simulator, and STISIM Drive®
)
1990s
Became employee-owned (ESOP) and advanced safety, certification, and dynamic stability research for next-generation aircraft systems
)
2000s
Achieved 100% employee ownership and patented Fused Reality®, the world’s first mixed reality device, integrating real and virtual environments for pilot training and mission rehearsal
)
2010s
Expanded productization with next-generation PARASIM®, real-time aeroelastic modeling tools, and FAA compliance support for eVTOL and Urban Air Mobility vehicles
)
2020s
Leading AI-driven pilot assessment, UAS handling research, and next-generation simulator development for defense, clinical, and commercial applications
)
)
){kind=icon}
){kind=icon}
){kind=icon}
){kind=icon}