Industrial It/ot Security Cybersecurity Jobs

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Cybersecurity Engineer II

Mirion Carrollton, TX

Carrollton, TX

Today

Contract Command And Control Security Engineer Identity and Access Management

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Job Description

Mirion is seeking an Engineer II, Cybersecurity Engineering to help deliver secure command-and-control systems for nuclear and other critical infrastructure environments. The role uses a Standard V-Model approach and spans requirements translation through cybersecurity architecture, integration and build, verification and validation, and onsite customer turn-up support. Work is based in Carrollton, TX with onsite duties and occasional travel.

What you’ll do

Translate customer cybersecurity requirements into traceable, component-level specifications using the Standard V-Model, working with Project Engineering Leads.
Maintain requirements and traceability records for assigned scope, identifying gaps, conflicts, or ambiguities for resolution.
Provide effort estimates for assigned tasks.
Contribute to cybersecurity architecture for AIM SCS and COTS-based command-and-control solutions, including network segmentation, access control, encryption, and secure communications, using established designs and baselines traceable to NEI 08-09 and CIS benchmark controls.
Develop and maintain design documentation for assigned scope, including network diagrams, configuration specifications, and cybersecurity control mapping matrices with traceability to system requirements.
Stand up, configure, and deploy platform environments including 20–30 Windows servers and workstations, virtualized infrastructure, Linux-based security appliances, network switches, and firewalls within an Active Directory domain.
Apply Group Policy-based security controls and hardening standards, following approved procedures and the related design documentation.
Perform COTS integration tasks including system hardening, vulnerability analysis, patching, and documentation of results.
Diagnose and resolve integration issues using an analytical approach, escalating complex or cross-discipline issues as needed and documenting resolution paths.
Maintain configuration management records throughout the build, documenting changes and deviations to preserve a complete audit trail.
Verify that assigned product feature sets meet functional and cybersecurity acceptance criteria prior to formal test completion.
Support cybersecurity testing by developing or supporting test procedures mapped through a Requirements Traceability Matrix (RTM) to validate compliance with applicable requirements.
Support Acceptance Testing by performing vulnerability assessments and security scans, documenting and tracking findings through disposition.
Support onsite deployment at customer sites, including physical installation, network commissioning, Active Directory integration, and system configuration per site-specific cybersecurity commissioning procedures.
Assist with Site Acceptance Testing (SAT) in coordination with customer security, IT/OT, and operations staff, and communicate technical status and test results to the project team.
Support training facility personnel and prepare turnover packages.
Capture lessons learned from system deliveries and recommend improvements to build, integration, and test procedures.
Follow and help maintain team standards, playbooks, and technical library content to support consistent engineering processes.
Build proficiency in nuclear regulatory and cybersecurity standards through on-the-job experience, training, and mentoring from senior team members.
Other duties as required.

Minimum qualifications

Bachelor’s degree in Cybersecurity, Systems Engineering, Computer Science, Electrical Engineering, Information Technology, or a related discipline.
2 to 4 years of hands-on experience in cybersecurity, systems, or network engineering.
Working knowledge of Windows Server and Active Directory, virtualization, and networking fundamentals (switching, routing, and firewalls).
Familiarity with system hardening, vulnerability scanning, and patch management.
Clear verbal and written communication skills, including the ability to produce technical documentation and report status.
Familiarity with systems engineering lifecycle practices such as the V-Model.
U.S. citizenship or permanent resident status required; ability to obtain site access credentials at nuclear power plants and government facilities.

Technologies and standards

Standard V-Model, V-Model
Windows Server, Active Directory, Group Policy
Linux, network switches, firewalls, virtualization
Requirements Traceability Matrix (RTM)
NEI 08-09, CIS benchmark controls
AIM SCS, COTS
IT/OT

Travel and physical requirements

Travel: Up to 25%.
Physical: Required to sit or stand, bend, type and reach while performing daily functions; daily work with office equipment and materials.

Preferred experience

Experience in project-based work with requirements-driven deliverables.
Experience with Linux-based appliances and virtualized clusters.
Exposure to nuclear power, defense, or other NRC/DOE/DOD-regulated environments, including nuclear communications systems and terminology.
Familiarity with NEI 08-09, NIST SP 800-82, NIST SP 800-53, IEC 62443, and NRC 10 CFR 73.54.
Security+, GICSP, or equivalent certification (or progress toward one).

Job type: contract. Location: Carrollton, TX (onsite).

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