Senior Network Engineer

MANTECH seeks a motivated, career and customer-oriented Senior Network Engineer to join our team onsite in San Antonio, TX.

This position supports the medical mission of the DoD and ensures that the highly complex and technical requirements related to the network infrastructure are addressed.

Responsibilities include but are not limited to:

• Develop, write, and implement network policies, procedures, and best practices for LAN/WLAN/WAN operations.
• Proactively define and establish minimum standards for network access to ensure optimal overall network performance.
• Serve as a primary consultant to government staff and partners on LAN/WLAN/WAN design, implementation, deployment, and management.
• Lead and collaborate with technical specialists and external organizations to quickly resolve complex network issues and ensure the network consistently supports the Military Health System (MHS) mission.
• Resolve deep-level technical issues across all layers of the OSI model, focusing on network and routing protocols.
• Utilize advanced network administration and diagnostic tools (e.g., Orion SolarWinds, ARMIS, Ansible).
• Employ knowledge of Management Information Blocks (MIB) and MRTG to measure performance, plan capacity, and ensure high network availability with minimum downtime.
• Enhance and maintain network security by managing the LAN/WLAN - WAN barrier systems to prevent unauthorized access.
• Configure and manage critical security infrastructure, including network firewalls, VPN devices, and Intrusion Detection Systems (IDSs).

Basic Qualifications:

• Bachelor's degree in Computer Science , Engineering or related discipline and 5+ years of directly related work experience OR completion of a certified Technical or Vocational School and 10+ years of directly related work experience gained through progressively higher levels of complexity

• Experience with DoD Health Care Information Systems

• Current Cisco Certified Network Professional (CCNP) certification
• Current Certified Information Systems Security Professional (CISSP) certification

• Experience supervising, lead ing , and managing teams

• Must maintain compliance with the Network Operations Specialist "Advanced, " per DoD 8140, "Cyber Workforce Qualification Program Qualification Matrix and Training Repository"

• M astery of normal networking protocols and technologies, such as TCP/IP, XDM, HTTP, HTTPS, SMTP, SNMP, DNS, DHCP, RSTP, VRRP, Berkeley Internet Name Domain (BIND), EIGRP, BGP, OSPF, Point to Point Protocol (PPP), High-Level Data Link Control (HDLC), V.35, RS-449 and a clear understanding of the 802.1d, 802.1q, 802.1w, 802.3, 802.5, 802.10, 802.11, 802.3u, 803.2, and 802.3z communications and Internet standards.

• A clear understanding and direct experience with synchronous and asynchronous communications, Ethernet, Fast Ethernet, Gigabit Ethernet, FDDI, ATM, and other communications medium in use by the DoD and DHA. Experience with various Optical Time Domain Reflectometer (OTDR), cable testers, network sniffers and EIA/TIA cable standards and specifications

• Possess a mastery level of experience in routed, switched and shared LAN environments that operate such items as current supported versions of Microsoft OS, Windows Active Directory, UNIX and OpenVMS and employ routers, switches, and terminal servers as well as various local and long-haul WAN connectivity . Expertise in Windows networks, Cisco Systems, and Orion SolarWinds.

Preferred Qualifications:

• Experience with Zero Trust Architectures and Methodologies

Security Clearance Requirements:

• Must possess active Secret s ecurity c learance

Physical Requirements:

• Must be able to remain in a stationary position 50%
• Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer