Tier III Senior Network Engineer

Leidos LLC; Tampa (FL); On-site; USD 73,000 - 133,000; Full time

Job summary

Leidos is seeking a Senior Network Engineer (Tier III) to support the GSM-O II and JCSE at MacDill AFB, FL. You will design, test, and implement routing and switching solutions, ensuring secure, scalable, and compliant network architectures across enterprise environments.

Responsibilities include providing Tier III support, evaluating new technologies, and presenting technical briefs to stakeholders. A Secret clearance is required, plus DoD 8140 IAT Level II certifications and relevant

Qualifications

• DoD 8140 IAT Level II certification required.
• BS Degree and 4-8 years of prior relevant experience; Masters with 2-6 years may be considered.
• Secret clearance required.
• CCNP Enterprise Education: BS Degree and 4-8 years of prior relevant experience or Masters with 2-6 years of relevant experience.

Responsibilities

• Provide Tier III routing and switching support with hands-on design, testing, and implementation of IGP, EGP, MPLS, VRF, and NFV/Service Chaining.
• Ensure end-to-end network performance across LAN, WAN, CAN, SAN, and data centers.
• Create design objectives, technical specs, performance requirements, and interoperability specs with government customers.
• Ensure designs comply with industry, DoD standards and RMF cybersecurity requirements.
• Develop briefings, papers, and spreadsheets to meet customer requirements.

Education

DoD 8140 IAT Level II certification

BS Degree

Masters degree

Secret Clearance

Job description

Seeking a career with a sense of purpose, work life balance, and growth opportunities … There’s a place for you at Leidos! 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 global team providing services across civil, defense, health, and intelligence business lines. At Leidos, team member career development, flexibility, and well-being are priority and is supported by consistent leadership engagement, an experienced human relations staff, and numerous employee support programs. Use your unique talents and make an immediate impact… Leidos has an opening for a highly motivated Tier III Senior Network Engineer at MacDill AFB, FL. As the Senior Network Engineer, you will support the Global Solutions Management-Operations II (GSM-O II), Joint Communications Support Element (JCSE). The JCSE team provides en-route, early entry, scalable C4 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 the Position

• conducting analysis and assessments on new emerging technologies
• developing and recommending functional design solutions to meet stakeholder requirements
• providing Tier III support to the Joint Network Operations Center (JNOC)
• developing, engineering, and recommending hardware and software solutions
• conducting cybersecurity mitigations on design solutions to comply with Risk Management Framework (RMF) cybersecurity requirements

Responsibilities

• Providing Tier III 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.
• Ensuring proper routing protocols are being applied to optimize the end-to-end network performance from the Local Area Network (LAN) through a Wide Area Network (WAN), to a Campus Area Network (CAN), to a Storage Area Network (SAN), or data center.
• Assisting the government customer with identifying any derived design objectives, technical specifications, performance requirements, and interoperability specifications to ensure the system design will meet stakeholder end-to-end requirements.
• Ensure the system design adheres to industry standards, DOD standards, DOD policies, DOD instructions, DOD directives, cybersecurity policies, and best commercial practices.
• Develop presentations to stakeholders articulating the gaps, requirements, objectives, functional and solution architecture.
• Develop, review, and update briefings, papers, and/or spreadsheets to meet customer requirements.
• Provide analysis for how the operational, functional, and performance requirements will be met as part of the system design, test, and implementation of initial capabilities.

Minimum Qualifications

• Current DoD 8140 (formerly 8570) IAT Level II certification (CompTIA Security+ce, CCNA Security, CySA+, etc.)
• CCNP Enterprise Education: BS Degree and 4-8 years of prior relevant experience or Masters with 2-6 years of relevant experience. Specific experience, education and training may be considered in lieu of degree.
• Clearance: Secret

Pay Range

Pay Range $73,450.00 - $132,775.00

Pay and Benefits

Leidos understands that there are many factors that contribute to a career decision, but pay and benefits are fundamental factors. Compensation: Very competitive, with a robust rewards and recognition program Health and well-being: Comprehensive coverage with many programs (ex. HSA, FSA, Dental, Vision, 24/7 EAP) to ensure the well-being of you, eligible family members, and registered domestic partners. Income Protection: Programs to help navigate life events: Company-provided Term Basic Life, Group Universal Life, Optional Dependent Life, Accidental Death and Dismemberment, and Business travel accident Leave: Leidos is committed to work life balance, with competitive leave options. Retirement: Leidos 401k plan, with company match determined by fringe benefit package Employee Stock Purchase plan: 10% discount for all enrollees Family Benefits: Center-based and in-home back-up childcare, free access to Sittercity, and Dependent (Daycare) Flexible Spending Accounts

Commitment and Diversity

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.

Additional Information

Original Posting: June 26, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. Leidos Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com. Pay and Benefits Pay and benefits are fundamental to any career decision. That’s why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here. Securing Your Data Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].