> Markdown version of [/jobs/ext/3622831-operational-technology-ot-security-analyst-ics-penetration-tester](https://www.wearedevelopers.com/jobs/ext/3622831-operational-technology-ot-security-analyst-ics-penetration-tester). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Operational Technology (OT) Security Analyst / ICS Penetration Tester

- **Company:** Ipsecure, Inc.
- **Location:** San Antonio, TX, United States
- **Experience:** Experienced
- **Contract:** Permanent contract
- **Skills:** Software System Penetration Testing, Cyber Security, Information Systems, Ethernet, Supervisory Control and Data Acquisition (SCADA), Information Systems Security Architecture Professional, Modbus, Network Architecture, Network Segmentation, Information Technology, Bacnet, HMI Screens, Process Control Systems, Operational Systems, Vulnerability Analysis
- **Published:** October 8, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=029575de2f47194a

## About the Role

Security Clearance: Active TS/SCI
Education: Bachelor's degree in Information Technology, Computer Science, Cybersecurity, Information Systems, Engineering, or related discipline. Equivalent experience may be substituted.
Certification: Candidate must meet applicable IAT II certification requirements (ex: Security+).
Experience:

 * Minimum of 3-5 years of dedicated experience in cybersecurity testing, with at least 2 years focused specifically on OT/ICS environments.
 * Industrial Protocols: Solid working knowledge of industrial network architecture and the Purdue Model.
 * Safety Awareness: Proven track record of performing vulnerability assessments in operational environments where physical safety is the highest priority.

Preferred Qualifications
Certifications:

 * Global Industrial Cyber Security Professional (GICSP)
 * GIAC Response and Industrial Defense (GRID)
 * Certified Information Systems Security Professional (CISSP)
 * Offensive Security Certified Professional (OSCP/OSCP+) (as evidence of core ethical hacking capabilities)

## Description

We are seeking a highly skilled Operational Technology (OT) Security Analyst to evaluate, attack, and strengthen the security posture of our critical industrial control systems (ICS). Unlike standard IT penetration testing, this role requires a deep understanding of physical safety constraints, legacy industrial protocols, and the unique challenges of testing live production environments without causing downtime., * The candidate will be responsible for conducting hands-on safety-first security assessments, documenting vulnerabilities, and collaborating with plant engineers to mitigate physical and digital risks.

 * Vulnerability Testing: Conduct active and passive security assessments on OT environments, including SCADA, PLCs, RTUs, and HMI systems.
 * Protocol Analysis: Analyze and test proprietary and open industrial protocols (e.g., Modbus, DNP3, Ethernet/IP, PROFINET, BACnet).
 * Architectural Review: Evaluate network segmentation designs (Purdue Model) and identify unauthorized IT-to-OT bridging.
 * Risk Mitigation: Deliver clear, actionable remediation reports to both highly technical engineering teams and non-technical plant managers.
 * Safety First Execution: Design customized, non-disruptive testing methodologies specifically tailored to avoid triggering physical system failures or emergency shutdowns .