Network Engineer

MANTECH seeks a motivated, career and customer-oriented Network Engineer to join our team in Philadelphia, PA. This position is hybrid with 3 days onsite.

The Network Engineer will support Department of Defense (DoD) mission systems. This role leads the technical management of third party developed cybersecurity tools, coordinates shipboard installation and testing activities, and produces data-driven metrics that inform engineering priorities and leadership decisions.

Responsibilities include but are not limited to:

• OT Network Enumeration & Protection including passive network discovery, asset inventory management, threat detection & monitoring, and vulnerability management

• Third-Party tool management to include vendor coordination, tool integration, and acceptance testing

• Shipboard Installation & Testing which includes installation planning, site surveys & commissioning, and operational validation

• Metrics, Reporting & Stakeholder Communication requiring weekly & monthly metrics, data-driven recommendations, cross-team collaboration and documentation

• Produce clear written reports and brief technical and non-technical stakeholders, including government leadership

Minimum Qualifications:

• Bachelor’s degree with 12+ years of experience in network engineering, or an Associate’s degree with 14+ years of relevant experience, or a High School diploma with 16 years of experience

• An active and current DoD IAT Level II baseline certification (e.g., Security+ CE), or the ability to obtain one within 6 months of hire

• Working knowledge of TCP/IP networking, packet capture and analysis (Wireshark/Zeek), SIEM platforms, firewall and segmentation design, and common vulnerability assessment workflows

Preferred Qualifications:

• Master's and 10+ years of experience, or PhD and 8+ years of experience highly desired

• Project Management Professional (PMP), or Cisco Certified Network Associate (CCNA)Additional value for GICSP, GRID, CISSP, or equivalent OT/ICS-focused credentials

• Hands-on work with industrial control systems, SCADA, or shipboard control systems; familiarity with OT protocols such as Modbus, DNP3, IEC 61850, or Ethernet/IP

• Experience with passive OT monitoring platforms (e.g., Claroty, Dragos, Nozomi Networks, or equivalent) and integration with enterprise SIEMs

• Experience supporting Navy shipboard, afloat, or deployed environments, including availabilities, sea trials, or underway testing

• Familiarity with NIST SP 800-82, IEC 62443, RMF (NIST SP 800-37), and DoD cybersecurity policy

• Proficiency in Python, PowerShell, or Bash for data processing, metrics generation, and light tool development

Clearance Requirements:

• Must have a current and active Secret security clearance with ability to obtain a Top Secret clearance.

Physical Requirements:

• The person in this position must be able to remain in a stationary position 50% of the time. Occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, via email, phone, and or virtual communication, which may involve delivering presentations.