Expert functional safety engineering consulting for the world’s most critical systems.
At Critical Systems Analysis (CSA), we bridge the gap between advanced autonomous innovation and the rigorous demands of global safety standards. We empower engineering teams worldwide to transform complex compliance from a regulatory burden into a core strategic advantage.
Proof, not promises.
Real results from teams shipping safety-critical systems.
Robotics · Autonomous Mobile Robots
A Fortune 500 robotics manufacturer needed to deploy collaborative autonomous mobile robots into high-speed, human-shared facilities — with no mature regulatory blueprint to follow. CSA built the validation pathway from the ground up.
Read case studyA Fortune 500 robotics manufacturer needed to deploy collaborative autonomous mobile robots into high-speed, human-shared facilities — with no mature regulatory blueprint to follow. CSA built the validation pathway from the ground up.
Trusted by.
Railroads, robotics innovators, and equipment manufacturers across North America rely on CSA to validate their most safety-critical systems.
Partners
We work alongside the industry’s leading certification bodies and technical collaborators.
The problem
In an era of continuous, fast-moving design cycles, you need a functional safety partner who can keep pace with your engineering team. Too many organizations end up drowning in manual preparation work — or stuck with consultants who oversell their technical depth.
Principle 01 / 04
We become an extension of your design team, working reliably without constant oversight.
What we do
Principal-led functional safety engineering consulting across the full system lifecycle.
04 services
Standing apart
We operate as an embedded extension of your team, using an advanced AI-augmented approach to deliver release-ready safety cases faster — and with unmatched precision.
Slow & manual
Teams spend weeks gathering raw inputs and drowning in manual preparation work.
Accelerated core baseline
Specialized AI tools immediately extract initial data and automate preparation, clearing engineering bottlenecks.
Imprecise & inconsistent
Manual checking leaves programs vulnerable to systematic failures or misaligned design requirements.
Data-driven & consistent
Automated consistency checks maintain absolute accuracy across complex, multi-layered requirements.
Expensive rework
Safety is treated as a late-stage checkbox, forcing delays and redesigns at the end of a project.
Continuous integration
Identifying architectural safety concerns early in the V-model phase cuts your long-term cost of ownership.
Academic & disconnected
Dense compliance summaries delivered without real-world, machine-building utility.
Expert, actionable auditing
Senior safety engineers directly guide and verify every output — a strict human-in-the-loop mandate.
A qualified safety engineer is always in the loop.
About CSA
Principal-ledBen Twombly
Founder & CEOSarasota, FL
Ben Twombly is the CEO and founder of Critical Systems Analysis, a functional safety consulting firm based in Sarasota, Florida. He holds an FS Engineer certification from TÜV Rheinland and the Industrial Functional Safety Professional (IFSP) certification. Before co-founding CSA in May 2023, he spent six years as a Senior Safety Engineer at TÜV Rheinland, preparing clients for safety assessments across a wide range of safety-critical systems. He earned his degree in robotics from the Colorado School of Mines.
At CSA, Ben and his team work with robotics companies, autonomous vehicle manufacturers, industrial machinery firms, battery management system developers, and rail transit organizations across the U.S., Canada, and Europe.
Hands-on certification experience
Active in the field
CSA contributes to the development of functional safety standards and is present at the industry’s leading events each year.
Insights
Field notes, standards updates, and what we’re learning at the frontier of functional safety.
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