Senior Network Engineer

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. They are seeking a Senior Network Engineer to provide senior-level leadership in designing, implementing, and optimizing complex enterprise network environments while supporting operations and engineering teams.

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

Requirements:

• 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
• 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