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Lead Firewall Engineer Security Clearance
Job in
Arnold, Jefferson County, Missouri, 63010, USA
Listed on 2026-06-03
Listing for:
CACI
Full Time
position Listed on 2026-06-03
Job specializations:
-
IT/Tech
Cybersecurity, Systems Engineer, Network Security
Job Description & How to Apply Below
Job Title:
Lead Firewall Engineer Job Category:
Information Technology Time Type:
Full time Minimum Clearance Required to Start: TS/SCI Employee Type:
Regular Percentage of
Travel Required:
Up to 25% Type of Travel:
Continental US *
*
* The Opportunity:
TCS is looking for a Lead Firewall Engineer to oversee the NSS Boundary Team. This role will report directly to the Branch Chief of Cyber Technology Services. This position is responsible for maintaining compliance with quality assurance standards and ensuring service level agreements are met or exceeded within this service area. Experience in reviewing, validating, and implementing requirements within enterprise Change Requests (CRQs) and determining impacts to network and cyber operations across the enterprise.
This role is also responsible for providing technical oversight of troubleshooting efforts and solutions development executed by the subordinate team. Responsibilities:
Serve as the focal point for all firewall tasks, operations, and projects
• Lead, direct, and manage execution of all daily operations, troubleshooting, and maintenance activities of the NSS Boundary work center.
• Design, implement Manage security solutions using F5, Juniper SRX, and Palo Alto for project-based requirements.
• Ensure systems, devices, and application under your responsibility and span of control meet applicable STIG/SRG and organizational configuration baselines
• Lead regular compliance evaluations and audits
• Develop, oversee, maintain, and enforce configuration management processes, Standard Operational Procedures (SOPs), and other documentation as needed/required.
• Monitor platform performance, logs, software version(s), and configuration drift to identify and mitigate performance, compliance, and security issues.
• Develop and maintain network architecture diagrams, inventories, and licensing status for the various capabilities within the scope of the team.
• Provide written reports and oral briefings to contract and government leadership
• Coordinate issues with the appropriate stakeholders to ensure task completeness and overall customer satisfaction.
• Provide recommendations on newly submitted customer requests.
• Evaluate and report on new/emerging network/communication technologies to enhance capacity, performance and reliability of the network.
• Evaluate and recommend changes and/or technology upgrades to address performance, standardization and industry best practices.
• Conduct performance assessments, mentor, and coach personnel.
Qualifications:
• Security Clearance:
Active TS/SCI
* 8+ years related technical experience network security technologies, tools, and techniques
* 5 + years' experience with large-scale enterprise/global networks in a high paced diverse environment
* Understanding and experience with the DoD Architecture Framework and other key DoD network architecture and strategic planning instructions
• Demonstrated knowledge in planning, directing, and managing a Firewall / Boundary Security Team in an organization similar in size
• Firewall experience within the DoW or IC
• Demonstrated knowledge of implementation of Perimeter and Internal Firewalls (both physical and virtual contexts)
• Demonstrated advanced experience in managing baseline configurations across numerous firewalls
• Demonstrated advanced experience in evaluating rules to ensure maximum security while minimizing redundancy and processing overhead
• Demonstrated experience with researching and fielding new and innovative firewall technology
• Experience with F5 platforms/technologies (APM, AFM, SSLO, etc.)
• Experience with Palo Alto platforms/technologies (Threat Prevention, Wildfire, URL Filtering, Global Protect)
• Experience with Juniper SRX platforms/technologies
• Experience with Online Certificate Status Protocol OCSP revocation
• Familiar with DoD PKI, Kerberos, LDAP, Active Directory, Authentication (SAML, OAuth)
• Ability to describe and troubleshoot TLS/SSL handshake/connection issues
• Network design, engineering, and implementation (Advanced Level)
• Creation of network related Rough Order Magnitude (ROM) equipment lists and costing, Level of Effort (LOE) estimation for…
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