Operational Technology (OT) Security Analyst / ICS Penetration Tester

IPSecure, Inc.; San Antonio (TX); On-site; USD 110,000 - 150,000; Full time

Benefits offered by this job

Medical

Dental

Vision

Unlimited vacation

Sick leave

Paid federal holidays

Education reimbursement

401(k) with match

Prepaid legal plan

Identity protection plan

Accident insurance

Critical illness insurance

Hospital indemnity insurance

Job summary

IPSecure, Inc. seeks an Operational Technology Security Analyst to evaluate, attack, and harden ICS security while prioritizing safety. The role requires active TS/SCI clearance and a hands‑on approach to protect critical industrial control systems.

Responsibilities include vulnerability assessments on OT environments, protocol analysis, and reporting risks to both engineers and plant leadership, with a strong emphasis on non‑disruptive testing to prevent downtime.

Qualifications

• Minimum of 3–5 years of dedicated cybersecurity testing experience.
• At least 2 years focused on OT/ICS environments.
• Solid working knowledge of industrial network architecture and the Purdue Model.
• Safety awareness with testing in operational environments where physical safety is priority.

Responsibilities

• Conduct hands‑on, safety‑first security assessments, documenting vulnerabilities and collaborating with plant engineers to mitigate risks.
• Vulnerability testing on OT environments including SCADA, PLCs, RTUs, and HMI systems.
• Analyze and test proprietary/open industrial protocols (e.g., Modbus, DNP3, Ethernet/IP, PROFINET, BACnet).
• Evaluate network segmentation designs (Purdue Model) and identify IT‑to‑OT bridging issues.
• Deliver clear, actionable remediation reports to engineering teams and plant managers.
• Design customized, non‑disruptive testing methodologies to avoid triggering physical system failures.

Skills

OT/ICS security

Vulnerability testing

Industrial protocols knowledge

Purdue Model

Safety-first testing

TS/SCI Clearance

Education

Bachelor's degree in IT/CS/Cybersecurity/Engineering

Tools

Modbus

DNP3

Ethernet/IP

PROFINET

BACnet

Job description

Operational Technology (OT) Security Analyst / IC S Penetration Tester – TS/SCI Clearance Required – JBSA Lackland – San Antonio, TX

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.

Job Responsibilities

• 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.

Basic Qualifications

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)

Benefits

• Medical
• Dental
• Vision
• Unlimited Vacation
• Sick Leave
• Paid Federal Holidays
• Education and Certification Reimbursement Program
• 401(k) retirement plan with safe harbor employer match after 3 months
• Prepaid Legal Plan and Identity Protection Plan available
• Accident Insurance
• Critical Illness Insurance
• Hospital Indemnity Insurance available

EEOC Statement

IPSecure does not discriminate based on race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or status as a protected veteran.