Brian Sewell
Midlothian
Summary
Strategic Cybersecurity Engineering Manager with 20+ years of experience securing critical infrastructure, defense programs, and enterprise systems. Proven expertise in 10CFR73.54/73.55 compliance, vulnerability monitoring and management, patch automation, and secure system lifecycle engineering, delivering resilient, high-performing solutions across 42 sites by embedding security into design, deployment, and sustainment, and pioneering the first automated Windows, software, and Secure Configuration Management Applications that enforce consistency and performance at scale. Recognized for resilient leadership during the COVID-19 pandemic, where I spearheaded the design and development of offline patch-testing environments that enabled uninterrupted lifecycle management while remote, keeping projects on schedule and positioning the organization as the only vendor able to continue onsite customer updates. Skilled in leading engineering teams, driving adherence to Nuclear Energy Institute Cyber Security Plan (NEI 08-09), National Institute of Standards and Technology (NIST), and Department of Homeland Security Cybersecurity Framework (DHS CSF) standards, and partnering with executives to align cyber investments with mission and regulatory requirements. Consistently deliver 99.99% system uptime, achieve audit-readiness across regulated environments, and safeguard multi-billion-dollar assets.
Overview
32
32
years of professional experience
1
1
Certification
Work History
Cyber Engineering Manager (Lifecycle Management)
Mirion Technologies, Inc.
12.2023 - Current
- Manage a team of cyber engineers supporting 42 sites, delivering enterprise security updates and infrastructure support for SIEM, NIDS, firewalls, endpoint protection, VMware ESXi/vCenter, backup/recovery, servers, and workstations.
- Developed and iteratively improved a Secure Configuration Management Application with a unified menu interface, ensuring standardized secure configurations across enterprise systems. Enhanced the application with automated reporting, baseline checking, and error-checking features. Deployed across 42 sites, the application ensured enterprise-wide consistency, enhanced security baselines, and improved deployment performance by 30%.
- Integrate cybersecurity solutions into critical infrastructure and SCADA/ICS systems, supporting compliance with 10CFR73.54/73.55 and improving performance, scalability, and resilience.
- Conduct vulnerability assessments, patch validation, and automated deployments, reducing remediation timelines by 40% while improving system stability.
- Designed and standardized SOPs, ensuring repeatable processes and compliance with NEI 08-09 and NIST standards.
- Provided NRC Cyber Audit support, incident response leadership, and log/vulnerability review services throughout the project lifecycle.
- Contributed to departmental strategy and budget planning, optimizing resources and staffing.
- Delivered customer training and workshops; supported business development through cybersecurity proposals.
- Mentored and motivated team members, fostering a high-performance culture.
Cyber Engineering Manager (Lifecycle Management)
Raytheon Technologies (ARINC Division Acquired by Mirion)
11.2018 - 12.2023
- Directed multi-disciplinary cyber engineering teams across multiple projects, delivering secure solutions for government and commercial clients.
- Spearheaded a COVID-era innovation by developing offline testing environments for patch validation, enabling secure lifecycle management while staff worked remotely. This initiative kept projects on schedule and positioned the company as the only vendor capable of flying teams onsite and updating customer systems during the pandemic.
- Enhanced delivered product security and performance by embedding secure, optimized configurations and resilience measures, reducing system misconfigurations by 25% and boosting operational stability.
- Spearheaded $50M+ portfolio of cybersecurity projects, achieving 100% compliance with NEI directives and industry frameworks.
- Oversaw integration of endpoint protection, SIEM, IDS/IPS, and firewall solutions tailored to customer requirements.
- Championed lifecycle engineering best practices, reducing downtime by 35% and accelerating remediation cycles by 40%.
- Applied formal systems engineering methodologies to ensure requirements traceability, design validation, and compliance with quality management processes.
Cyber Engineering Technical Project Manager
Rockwell Collins (Acquired by Raytheon)
07.2014 - 11.2018
- Promoted to leadership role overseeing enterprise cybersecurity engineering teams across multiple product lines and delivering nine systems.
- Introduced a Secure Configuration Management Application with a unified menu interface, enabling standardized secure configurations across customer systems. Improved accountability, reduced misconfigurations, and increased audit readiness by 25%.
- Developed the organization’s first automated Windows, software, and configuration management deployment system, enabling faster rollouts, consistent baselines, and project-wide standardization.
- Introduced early automation practices for deployment, laying the foundation for the enterprise-wide configuration management system later scaled at Mirion.
- Directed vulnerability management and remediation efforts, reducing exploitable risk by 45% across supported environments.
- As Sr. Engineer, served as SME for Switches, Applications, SIEM, IDS/IPS, firewalls, and encryption, designing resilient systems that sustained 99.9% uptime.
Information Security Manager / Contractor Program Security Officer (CPSO)
Boeing Aerospace
05.2013 - 07.2014
- Directed security operations for classified programs across 31 facilities, ensuring compliance with DoD and federal regulations.
- Established governance standards and prioritization models that improved project execution and audit readiness.
- Developed a secure tracking database for 2,300+ assets, enhancing accountability and audit accuracy by 25%.
- Delivered executive-level recommendations that reduced IT risk while cutting costs by $2M annually.
Senior Information Security Manager / IT Manager / IT Analyst
United States Air Force
05.1993 - 05.2013
- Oversaw security of $30B aircraft support systems, ensuring mission readiness.
- Directed certification & accreditation of 200+ systems valued at $6.8B.
- Led multi-base deployments, engineering first Type 1 encryption networks for combat squadrons.
- Engineered and maintained classified and unclassified networks supporting 2,000+ systems with 99.9% availability.
Education
MBA - Information Security Management
Saint Leo University
BS - Computer Information Systems
Saint Leo University
Skills
- Security Platforms & Tools: Security Information and Event Management (SIEM) (Splunk, Trellix), Intrusion Detection/Prevention Systems (IDS/IPS), Firewalls (Cisco ASA, Palo Alto, Checkpoint), Endpoint Protection (McAfee, Symantec), Vulnerability Monitoring & Management, Patch Automation, Backup & Recovery
- Compliance & Governance: Nuclear Energy Institute Cyber Security Plan (NEI 08-09), Title 10 Code of Federal Regulations (10CFR) 7354/7355, National Institute of Standards and Technology (NIST) 800 Series, Department of Homeland Security Cybersecurity Framework (DHS CSF),Framework (RMF)
- Networking & Communications: LAN/WAN, Virtual Private Network (VPN), Cisco Routing & Switching, TCP/IP, Internet Protocol Security (IPSec), Secure Remote Access, Network Segmentation
- Infrastructure & Systems: Windows Server (2008–2022), Workstation (XP–11), Linux/Unix (Red Hat, Solaris), VMware ESXi & vCenter, Enterprise Storage & Server Hardware
- Programming & Automation: PowerShell, SQL, Visual Basic, Automation Scripting for Security Operations
- Advanced Security Architectures: Remediation racks supporting multi-system patch validation, secure data transfer via Data Diodes, and centralized monitoring for high-assurance environments
Certification
CISSP (ISC² #492424)
Core Competencies
- Cybersecurity Architecture & Lifecycle Management (NEI 08-09, NIST 800 Series, DHS CSF)
- Critical Infrastructure Security & NRC Regulatory Compliance (10CFR73.54/73.55)
- Vulnerability Management & Automated Deployment | SIEM, IDS/IPS, Firewalls
- Automated OS & Software Deployment | Secure Configuration Management & Compliance Automation
- Incident Response & Audit Readiness | NRC Cyber Audit Support | CDA Assessments & Testing
- Program & Portfolio Leadership | P&L Oversight | Cost & Process Governance
- Secure System Deployment & Sustainment (Servers, Workstations, VMware ESXi/vCenter, Networking)
- Stakeholder Engagement & Cyber Training | Executive Communication | Customer Enablement
- Team Leadership & Workforce Development | Mentorship & High-Performance Culture
Timeline
Cyber Engineering Manager (Lifecycle Management)
Mirion Technologies, Inc.
12.2023 - Current
Cyber Engineering Manager (Lifecycle Management)
Raytheon Technologies (ARINC Division Acquired by Mirion)
11.2018 - 12.2023
Cyber Engineering Technical Project Manager
Rockwell Collins (Acquired by Raytheon)
07.2014 - 11.2018
Information Security Manager / Contractor Program Security Officer (CPSO)
Boeing Aerospace
05.2013 - 07.2014
Senior Information Security Manager / IT Manager / IT Analyst
United States Air Force
05.1993 - 05.2013
BS - Computer Information Systems
Saint Leo University
MBA - Information Security Management
Saint Leo University
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