Cybersecurity Jobs in Carrollton, TX

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Senior Cybersecurity Engineer

Mirion Carrollton, TX

Carrollton, TX

Today

Contract Senior Cybersecurity Architecture Cybersecurity Operations

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Job Description

Own end-to-end delivery of secure command-and-control cybersecurity engineering for critical infrastructure systems within a Standard V-Model framework.

Responsibilities

Translate customer cybersecurity needs into traceable system-level and component-level specifications using the Standard V-Model, in collaboration with Project Engineering Leads.
Contribute to engineering cost estimates from project requirements and communicate requirements-related issues and risks to program leadership and customers.
Design cybersecurity architectures for AIM SCS and COTS-based command-and-control solutions, including:
- Network segmentation, access control, encryption, secure communications
- Integration of physical security subsystems
Ensure design decisions are traceable to applicable NEI 08-09 and CIS benchmark controls.
Architect platform environments of 20–30 Windows servers and workstations within an Active Directory domain, including:
- Group Policy-based security controls
- Virtualized cluster layouts
- Storage systems
- Linux-based security appliances
- Network switches and firewalls
Produce and maintain design documentation with full traceability to system requirements, including:
- Virtual and network design plans
- Network architecture diagrams
- Configuration specifications
- Cybersecurity control mapping matrices
Stand up, configure, and deliver 20–30 servers and workstations in Active Directory environments.
Perform server and network deployment across the product delivery lifecycle to prioritize deliverables, validate feature sets, and maintain schedule and budget alignment.
Integrate COTS solutions using system hardening, vulnerability analysis, documentation, and patching.
Diagnose and resolve integration issues using systematic analysis, creative problem-solving, and documented resolution paths.
Maintain configuration management records throughout the build, documenting decisions, changes, and deviations for a complete audit trail.
Verify product feature sets to confirm functional and cybersecurity capabilities meet acceptance criteria prior to formal test completion.
Collaborate on development and execution of cybersecurity test procedures mapped through a Requirements Traceability Matrix (RTM), validating compliance at both component and system levels.
Support Acceptance Testing, including vulnerability assessments and security scans, with dispositioning of findings.
Support onsite deployment at customer sites: physical installation, network commissioning, Active Directory integration, and system configuration per site-specific cybersecurity commissioning procedures.
Conduct Site Acceptance Testing (SAT) with customer security, IT/OT, and operations staff to resolve integration challenges in real time and communicate status, test results, and dispositions to stakeholders.
Train facility personnel on system operation, cybersecurity maintenance, and configuration management practices; deliver turnover packages.
Travel up to 25%.
Drive continuous improvement by capturing lessons learned after each delivery and updating design standards, integration procedures, and test methodologies.
Mentor junior engineers and serve as a technical point of contact for direct customer communications.
Other duties as required.

Requirements

Bachelor’s degree in Cybersecurity, Systems Engineering, Computer Science, Electrical Engineering, Information Technology, or related discipline.
5 to 7 years of hands-on experience.
Strong verbal and written communication skills, including ability to produce formal engineering documentation and present technical content to multiple audiences.
Knowledge of engineering methodologies.
U.S. citizenship or permanent resident status required.
Ability to obtain site access credentials at nuclear power plants and government facilities.

Technologies

Standard V-Model
NEI 08-09
CIS benchmark controls
AIM SCS
COTS
Windows servers, Windows workstations
Active Directory, Group Policy
Virtualized cluster layouts
Linux-based security appliances
Network switches, firewalls
Requirements Traceability Matrix (RTM)
NIST SP 800-82, NIST SP 800-53
IEC 62443
NRC 10 CFR 73.54

Preferred

Experience in project-based work with requirements-driven deliverables.
Networking protocols and small to mid-sized network design.
Virtualized clusters.
Direct experience delivering systems in nuclear power, defense, or other NRC/DOE/DOD-regulated environments, including familiarity with nuclear communications systems and terminology, and NRC 10 CFR 73.54 compliance processes.
CISSP or equivalent certification; GICSP, Security+, or CASP+.
Familiarity with NIST SP 800-82, NIST SP 800-53, and IEC 62443 for industrial and critical infrastructure cybersecurity.

Work Location and Type

Contract
Onsite: Carrollton, TX

Work Environment / Physical Requirements

Required to sit or stand, bend, type, and reach while performing daily functions.
Daily work with office equipment and materials.
During duties, employee sits at a desk or stands to perform other tasks.

Work environment descriptions and essential-function duties may vary; reasonable accommodation may be made for individuals with disabilities.

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