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MANTECH · 17 hours ago

Senior Network Engineer

San Antonio, TX

Full-time

Onsite

Senior Level

5+ years exp

MANTECH seeks a motivated, career and customer-oriented Senior Network Engineer to join their team. This role supports the medical mission of the DoD by addressing complex and technical requirements related to network infrastructure and ensuring optimal network performance.

Cyber SecurityInformation TechnologySecurityTelecommunications

Growth Opportunities

No H1B

Security Clearance Required

U.S. Citizen Only

Responsibilities

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)

Qualification

Network protocolsCisco SystemsOrion SolarWindsWindows networksCISSP certificationNetwork securityTechnical documentationSoft skills

Required

Bachelor's degree in a technical field and 5+ years of related experience, OR completion of a technical/vocational program and with 10+ years of related experience

Extensive experience with a wide range of networking protocols and technologies, including (but not limited to):

Layer 2/3 Protocols: TCP/IP, EIGRP, BGP, OSPF, VRRP, RSTP

Common Services: DNS, DHCP, HTTP, HTTPS, SMTP, SNMP

WAN Technologies: PPP, HDLC, V.35, RS-449

Clear understanding of IEEE 802 communications and Internet standards (e.g., 802.1d,802.1q,802.1w,802.3,802.11, etc.)

Direct experience with synchronous and asynchronous communications and various network media: Ethernet (Fast, Gigabit), FDDI, and ATM

Demonstrated experience in routed, switched, and shared LAN environments

Proficiency in maintaining environments that utilize: Current supported versions of Microsoft OS, Windows Active Directory, UNIX, and OpenVMS. Routers, switches, and terminal servers. Various local and long-haul WAN connectivity solutions

Familiarity with network diagnostic tools: Optical Time Domain Reflectometer (OTDR), cable testers, and network sniffers

Knowledge of EIA/TIA cable standards and specifications

Experience with DoD Health Care Information Systems

Expertise in Windows networks, Cisco Systems, and Orion SolarWinds; Cisco Certified Network Professional (CCNP) and Certified Information Systems Security Professional (CISSP)

Must possess an active Secret security clearance