Network Security Engineer

At 4A Consulting, we turn complexity into opportunity. Founded in 2014 and headquartered in Baltimore, MD, we are a women-owned, boutique consulting firm specializing in delivering innovative, data-driven solutions to both the Federal Government and Fortune 500 clients. Our team blends deep industry knowledge with advanced technologies to design tailored strategies that drive measurable and sustainable outcomes. We pride ourselves on an agile, collaborative approach that helps organizations navigate challenges and seize emerging opportunities in a rapidly evolving digital landscape.

At 4A, we don’t just deliver projects, we build trusted partnerships that empower our clients to lead with confidence in the digital age.

The Senior Network Engineer (Security) will be responsible for designing, implementing, monitoring, and maintaining enterprise network and security infrastructure in a hybrid environment. This role requires deep technical expertise in LAN/WAN architecture, network security, and performance optimization, along with the ability to operate independently and lead complex initiatives. You will support high-availability network environments, provide technical guidance to leadership, and collaborate with cross-functional teams to ensure secure, reliable, and scalable network operations.

• Plan, design, and build LAN and WAN infrastructures, including firewalls, routers, switches, access points, and related network components.
• Perform configuration, monitoring, troubleshooting, and maintenance of:
  • Firewalls
  • Routers and switches
  • Network Access Control (NAC)
  • Network Management Systems (NMS)
  • IDS/IPS
  • VPN solutions
  • SIEM platforms
• Develop and maintain network documentation, including diagrams, configurations, and technical descriptions.
• Monitor network performance and availability, ensuring 99.9% uptime and uninterrupted operations.
• Analyze current and projected network traffic to forecast capacity needs and design future-ready solutions.
• Conduct short- and long-term network planning to meet organizational communication requirements.
• Research emerging technologies and evaluate vendor solutions; prepare tradeoff studies and recommendations.
• Generate network monitoring and utilization reports to support performance analysis and decision-making.
• Interact with internal IT teams, external agencies, and vendors to support new implementations and resolve incidents.
• Troubleshoot network issues, resolve outages, and mitigate service degradation without impacting performance.
• Document incidents, changes, and resolutions using ticketing systems, ensuring timely and accurate updates.
• Perform project management tasks, including team coordination, scheduling, training, and maintenance planning.
• Provide high-quality customer service and technical support to internal and external stakeholders.
• Ensure compliance with security, confidentiality, legal, regulatory, and organizational policies.
• Lead cross-functional teams and manage stakeholder relationships to drive consensus and successful outcomes.

• 8+ years of experience in enterprise network engineering and operations, supporting large-scale environments.
• 7+ years of experience configuring and managing routers and switches in complex LAN/WAN infrastructures.
• 3+ years of hands-on experience configuring and managing firewalls.
• 10+ years of experience monitoring network equipment, performance, and availability in enterprise environments.
• Strong experience with network analysis and management tools, supporting client/server architectures.
• Strong understanding of network security technologies, including IDS/IPS, VPNs, NAC, and SIEM solutions.
• Excellent written and verbal communication skills, with the ability to produce clear, concise, and audience-appropriate documentation.
• Ability to troubleshoot complex network issues and implement effective, timely resolutions.
• Ability to work independently in hybrid and on-site environments, including travel to multiple locations as required.

• Experience supporting hybrid remote and on-site network environments.
• Experience working in public-sector or highly regulated…