Network Security Engineer

At Leidos, we are committed to making the world safer, healthier, and more efficient through technology, engineering, and science. You would be a valued member of a global team providing services across civil, defense, health, and intelligence business lines. Team career development, flexibility, and well‑being are a priority and are supported by consistent leadership engagement, an experienced human relations staff, and numerous employee support programs.

The Leidos Digital Modernization Sector has an opening for a highly motivated individual. The Tier III Network Security Engineer position at Mac Dill AFB, FL supports the Global Solutions Management‑Operations II (GSM‑O II) and Joint Communications Support Element (JCSE). The JCSE team provides en‑route, early‑entry, scalable C5 support to Regional Combatant Commands, Special Operations Command, and other agencies. In this role, you will be responsible for new capability requirements and design, system assessments, and providing hands‑on engineering support.

Key elements of this position include conducting analysis and assessments on emerging technologies; developing and recommending functional design solutions to meet stakeholder requirements; providing Tier III support to the Joint Network Operations Center (JNOC); engineering hardware and software solutions; and conducting cybersecurity mitigations to meet Risk Management Framework (RMF) requirements.

This position requires a strong understanding of VPN technologies, IPSec, RA/CA processes and authorities, and U.S. citizenship with an active Secret clearance.

• Provide firewall, routing, and switching support with hands‑on experience designing, testing, and implementing IGP, EGP, MPLS, VRF, and NFV/Service Chaining on an enterprise network to meet security, performance, operational, and functional requirements.
• Ensure proper routing protocols are applied to optimize end‑to‑end network performance from LAN to WAN, CAN, SAN, or data center.
• Assist the government in identifying design objectives, technical specifications, performance requirements, and interoperability specifications.
• Develop, review, and update briefings, papers, or spreadsheets.
• Develop and implement firewall/router access rules, NAT policies, VPN technology, 802.1x, and radius protocols within the JCSE enterprise.
• Develop, implement, and support the overall network security architecture on the JCSE enterprise.
• Support development and test of equipment, including monitoring server/hardware usage and uptime.
• Provide direction in complex problem‑solving situations and participate in direct interaction with internal staff.
• Identify process improvement opportunities and design, implement, and maintain a consistent backup and disaster recovery plan.
• Perform vulnerability and risk analyses of security hardware and applications during all phases of the system development life cycle.
• Collaborate with operations, QA, and third‑party data centers for technical direction on network topologies, server configurations, deployments, and firewall configurations.

• Current DoD 8570 IAT Level II certification (CompTIA Security+ce, CCNA Security, CySA+, etc.)
• CCNP Security or another CCNP preferred
• B.S. degree and 4+ years of relevant experience (or equivalent experience, education, and training)
• Secret clearance

Compensation: Very competitive, with a robust rewards and recognition program.

Health and Well‑Being: Comprehensive coverage with many programs (HSA, FSA, dental, vision, 24/7 EAP).

Income Protection: Company‑provided term basic life, group universal life, optional dependent life, accidental death and dismemberment, and business travel accident.

Leave: Competitive leave options to support work‑life balance.

Retirement: Leidos 401(k) plan with company match according to the benefits package.

Employee Stock Purchase Plan: 10% discount for all enrollees.

Family Benefits: Center‑based and in‑home backup childcare, free access to Sittercity, and dependent (daycare) flexible spending accounts.

Pay Range: $73,450.00 – $ (general guideline only; additional factors considered).

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

REQNUMBER: R-

Leidos is an equal opportunity employer/disability/vet.