Senior Network Engineer

MANTECH; Miami (FL); On-site; USD 90,000 - 130,000; Full time

Job summary

MANTECH is seeking a motivated Senior Network Engineer in Miami, FL to design and maintain the connectivity of enterprise network assets. Candidates should have 9+ years of experience in networking, proficiency in Cisco technologies, and must hold a current secret clearance. This role involves collaboration on connectivity requirements and ensuring all network devices meet compliance standards. Master’s degree and networking certifications are preferred.

Qualifications

• 9+ years of networking experience with at least 5 years in Network Engineering.
• Hands-on experience with CISCO configuration and management.
• Experience in securing classified networks and implementing DISA STIGs.

Responsibilities

• Plan, design, and maintain enterprise network connectivity.
• Collaborate with stakeholders to implement connectivity configurations.
• Ensure all network hardware is compliant and operational.

Skills

Networking protocols (TCP/IP, DNS, DHCP)

Network security principles

Cisco networking technologies (IOS, NX-OS)

Intrusion detection/prevention systems

Network management tools

Cybersecurity frameworks (NIST)

Education

BA/BS in relevant field or 4 years additional experience

Master’s degree in Computer Science, IT, or relevant discipline

Tools

Cisco ASA firewalls

Cisco ISE

Job description

MANTECH seeks a motivated, career and customer-oriented Senior Network Engineer to join our team in Doral, FL.

Responsibilities

• Plans, designs, and maintains the connectivity of enterprise network assets, ensuring compliance and secure operations on classified networks (SIPR, NIPR, JWICS).
• Collaborates with stakeholders to address connectivity requirements and implements necessary configurations to facilitate efficient and secure data transmission.
• Ensures all network switches and routers are operational, properly configured, and compliant with DISA STIG requirements; performs regular maintenance, updates, and troubleshooting.
• Configures, maintains, and monitors firewalls, intrusion protection systems, intrusion detection systems, and Cisco Identity Services Engine (ISE) for network access control and authentication, and implements security measures for specialized systems and networks.
• Supports the planning and implementation of enterprise service connections between networks, systems, and applications across domains, facilitating connections for auditing, authentication, secure cloud computing architecture (SCCA), and cross-domain solutions and guards.
• Collaborates with ISSOs and Cybersecurity Services Leads in the Risk Management Framework (RMF) process, providing inputs and documentation, and mentors/trains other NOC staff and Junior Engineers.

Minimum Qualifications

• BA/BS in field necessary to assume Network Engineer or 4 years of additional experience in lieu of the degree
• 9+ years of experience with 5+ years of relevant Network Engineer experience.
• Deep understanding of networking protocols (TCP/IP, DNS, DHCP, routing protocols) and network security principles.
• Expertise in configuring and managing network devices, including routers, switches, firewalls, and intrusion detection/prevention systems, with hands‑on experience with Cisco networking technologies (e.g., IOS, NX‑OS) and security appliances (e.g., ASA firewalls, ISE).
• Familiarity with network monitoring and management tools, knowledge of virtualization and cloud networking concepts, and experience with securing classified networks (SIPR, NIPR, JWICS) and implementing DISA STIGs.
• Experience in cybersecurity frameworks and standards (e.g., NIST Cybersecurity Framework, RMF), knowledge of network access control and authentication mechanisms, ability to assess and mitigate network security risks, and DoD 8570.01-M IAT Level II certification.

Preferred Qualifications

• Master’s degree in Computer Science, IT, or a relevant discipline.
• Experience with cross-domain solutions and guards. Knowledge of cloud computing security architectures (e.g., SCCA).
• Experience with scripting and automation tools for network management. Familiarity with ITIL framework and service delivery concepts. ITIL Foundation certificate.
• Relevant networking certifications (e.g., Cisco CCNP, CCIE, CompTIA Security+).
• Experience at a DoD Combatant Command (e.g., SOUTHCOM, NORTHCOM, CENTCOM, CYBERCOM, INDOPACOM, EUCOM, AFRICOM, STRATCOM, TRANSCOM, SOCOM, SPACECOM) or a component is desired.

Clearance Requirements

• Must have a current/active secret clearance
• Must be eligible to obtain and maintain a TS/SCI clearance.

Physical Requirements

• Must be able to remain in stationary position for up to 50% of the time.
• Must be able to deliver clear and effective communication verbally and via email, phone, and virtual communication platforms to interface with co‑workers and customers.
• Must be able to occasionally move about inside an office environment to access file cabinets, office machinery, and communicate with co‑workers.