Engineering-led functional safety consulting in Houston, Texas, aligned to IEC 61511, ANSI/ISA 84, and ISO 26262.
Arista Cyber provides functional safety consulting in Houston, Texas that helps energy and industrial operators keep their safety-critical systems reliable, compliant, and audit-ready. As a functional safety company serving Houston, the energy capital of the United States, and the Gulf Coast petrochemical corridor, we deliver industrial functional safety engineering services across the entire safety lifecycle, from hazard identification through safety integrity level determination, verification, and validation. Our certified functional safety consultants work to IEC 61511, IEC 61508, ANSI/ISA 84, and ISO 26262, so your safety instrumented systems deliver the risk reduction they were designed for and support your obligations under OSHA Process Safety Management. Uniquely, we integrate functional safety with OT cybersecurity, because in a modern plant a cyberattack on a safety system is itself a functional safety risk.
Arista Cyber delivers functional safety services that keep safety-critical industrial systems reliable, compliant, and protected across the entire safety lifecycle. From hazard identification to safety validation, our certified functional safety experts help Houston and Texas operators reduce risk, meet functional safety standards, satisfy OSHA PSM expectations, and prove their systems perform when it matters most. With Houston at the center of US energy, refining, and petrochemical processing, we understand the specific demands of Gulf Coast operations, and work directly with your team on site across Texas and remotely.
Functional safety is the part of overall system safety that depends on protective systems operating correctly in response to their inputs. In industrial environments, it ensures a safety instrumented system, interlock, or emergency shutdown responds as it should when a hazardous condition occurs, protecting people, equipment, and production.
It spans the full lifecycle, from initial hazard analysis and requirements through design, validation, and ongoing management. Arista Cyber supports every stage for Houston and Texas operators, aligned to IEC 61511 and its US adoption ANSI/ISA 84 for process industries, IEC 61508 as the foundational standard, and ISO 26262 for automotive systems.
Systematic hazard and operability studies that identify risks and design safeguards, forming the foundation of your functional safety assessment and PSM program.
Safety integrity level assessment that evaluates the exact risk reduction each safety function requires under IEC 61511 and ANSI/ISA 84.
Detailed documentation that defines clear, testable safety goals for every safety-critical system.
Validation and verification confirming safety instrumented systems meet functional safety standards and operational requirements.
A complete functional safety management service that tracks and governs the safety lifecycle with audit-ready documentation.
Reliability, availability, maintainability, and safety analysis that optimizes system performance.
A structured series of assessments and audits across the lifecycle to evaluate performance and close gaps.
Proof test procedures that validate safety system functionality under real operating conditions.
A cyberattack on a safety instrumented system is itself a functional safety failure. Most providers treat functional safety engineering and OT cybersecurity as separate disciplines, and the gap between them becomes the exposure. Arista Cyber integrates both, aligning IEC 61511 with ISA/IEC 62443 so safety systems are protected against random failure and deliberate attack alike. Read more about our OT cybersecurity services and how they reinforce functional safety for Houston and Texas operators.
For Houston and Gulf Coast operators in oil and gas, petrochemical, and refining, this integrated approach closes a gap that safety-only and security-only providers leave open.
Functional safety is not a single task; it is a lifecycle. Each service maps to a stage of the IEC 61511 and ANSI/ISA 84 safety lifecycle.
| Lifecycle stage | What happens | Arista Cyber service |
|---|---|---|
| 1. Hazard & Risk Assessment | Identify hazards and assess process risk | HAZOP / HAZID Studies |
| 2. SIL Determination | Assign target safety integrity levels | SIL Assessment & Determination |
| 3. Safety Requirements | Define each safety function | Safety Requirement Specification |
| 4. Design & Verification | Confirm SIS design meets target SIL | SIL Verification, Proof Test Procedures |
| 5. Validation | Prove installed performance | Safety Validation & Verification |
| 6. Operation & Maintenance | Maintain safety performance | RAMS Study, FSM Documentation |
| 7. Assessment & Modification | Audit and manage change | Functional Safety Assessments (FSA 1 to 5) |
Our assessments and documentation align to international standards and US regulatory expectations:
The foundational functional safety standard for electrical, electronic, and programmable safety systems.
Functional safety for process-industry safety instrumented systems. ANSI/ISA 84 is the US adoption of IEC 61511.
HAZOP, SIL, and documentation work supports process hazard analysis and mechanical integrity under 29 CFR 1910.119.
Functional safety work supports planning for facilities handling regulated substances.
Applied where functional safety and OT cybersecurity intersect.
We provide industrial functional safety engineering services across every Texas sector where safety-critical processes carry real operational consequence, with a particular focus on the energy and processing industries that define the Houston and Gulf Coast economy: oil and gas, petrochemical, refining, chemical manufacturing, LNG, and power.
Our team holds globally recognized functional safety certifications and applies a structured, standards-based methodology to every engagement.
We work directly with Houston and Texas operators on site and remotely, with an understanding of OSHA PSM, Gulf Coast petrochemicals, and US regulation.
We support every safety-lifecycle stage, from hazard analysis through implementation and ongoing management.
We unite IEC 61511 and IEC 62443 for comprehensive protection of modern safety systems.
Our documentation is customized for your operations and designed to withstand OSHA, EPA, and internal scrutiny.
Whether you need a single SIL assessment or a complete functional safety management service, our team is ready to help.
→Book Your Free ConsultationYes. We provide functional safety consulting across oil and gas, petrochemical, refining, LNG, chemical manufacturing, and power, on site and remotely.
Yes. Our certified consultants deliver services aligned to IEC 61508, IEC 61511 and ANSI/ISA 84, ISO 26262, and ISA/IEC 62443.
Our HAZOP studies, SIL assessments, and documentation directly support PSM process hazard analysis and mechanical integrity elements.
A SIL assessment determines the risk reduction each safety function must deliver to bring risk to a tolerable level.
Our services cover HAZOP and HAZID, SIL assessment, SRS, validation and verification, RAMS, FSM, FSAs, and proof test procedures.
