Senior Network Engineer

Leidos is seeking a highly organized and detail-oriented Senior Network Architect / Administrator to support the HUD IOO O&M program in Washington, DC. This role combines advanced network architecture design with hands-on implementation and operational support. The ideal candidate will provide senior-level leadership in designing, implementing, and optimizing complex enterprise network environments while supporting operations and engineering teams. This position requires a forward-thinking professional who can evaluate emerging technologies and drive architectural improvements in a secure federal environment. At Leidos, we know the most talented and diverse IT and Engineering professionals will always have a multitude of career choices; your time at Leidos will be a wise investment in your career and in yourself. Primary Responsibilities

• Lead network architecture implementation across LAN/WAN, data center, and cloud environments

• Provide MPLS and SD-WAN network design, support, and technology implementation

• Architect and manage data center infrastructure solutions

• Design and implement Cisco Application Centric Infrastructure (ACI)

• Implement device authentication and network access control strategies using Cisco Identity Services Engine

• Architect and manage network security using:

• Cisco Firepower Management Center

• Cisco 3105 Firewalls (Active/Passive high availability clusters)

• Design secure access for enterprise applications, including Cloud and on premise based applications:

• Outlook, SharePoint, OneDrive, Teams

• Implementation of new network configuration on existing Zero Trust architecture leveraging Zscaler:

• Zscaler Internet Access (ZIA)

• Zscaler Private Access (ZPA)

• Zscaler Digital Experience (ZDX)

• Implement and mitigate security controls / finding:

• Block malicious IPs and URLs

• Mitigate vulnerabilities across network borders

• Integrate Zscaler with Cisco edge and border devices

• Address ServiceNow incidents, implement change orders

• Architect and manage secure VPN solutions (Cisco ASA) for business partners

• Provide technical leadership, mentoring, and strategic recommendations

• Bachelor's degree with 8-12 years of relevant experience or Master's degree with 6-10 years of experience
• Strong experience in network architecture design and implementation
• Deep expertise in networking technologies (routing, switching, security, firewall, load balancers, VPN, NAC, and data center fabrics)
• Experience with enterprise security architecture and Zero Trust frameworks
• Experience supporting federal or large enterprise environments
• Strong analytical, troubleshooting, and leadership skills
• Advanced network troubleshooting skills.
• Excellent customer service skills.
• Excellent oral and written communication skills.
• Strong leadership skills.
• Ability to collaborate effectively across multiple teams/functions.
• Ability to work independently with a sense of urgency.

Clearance Requirements

• Must be able to obtain and maintain a Public Trust security clearance.
• United States Citizenship is required., * Cisco Certified network Associate
• Cisco Certified Network Professional (Enterprise, Security)
• Ability to think critically about processes and make recommendations for improvement.
• Strong collaboration, prioritization, and adaptability skills.
• Ability to effectively communicate with all organizational levels.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares. Original Posting: April 15, 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. Pay Range: Pay Range $92,300.00 - $166,850.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law. About 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 $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit . 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 at . Securing Your Data Beware of fake employment opportunities using Leidos' name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at . If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the . Commitment to Non-Discrimination 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. #Remote