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Firewall Network Engineer in Bethesda, MD at ManTech

Date Posted: 11/4/2018

Job Snapshot

Job Description

Group: MSS

Clearance Level Needed: Public Trust

Shift: Rotating

Category: Networks & Telecommunication Services

ManTech is seeking a Senior Network Engineer to provide support and to operate network and security components which include routers, switches, firewalls, load balancers, wireless devices, data centers, and cloud services in both a greenfield and brownfield infrastructure. The successful candidate will support multiple networks that operate 24 hours a day 365 days a year requiring 99.99995% uptime. Normal business hours are between 6 a.m. and 6 p.m. Eastern Time. Daily duties include managing the USCIS network and security devices which include and are not limited to the following:

• Cisco ASA

• Cisco Security Manger

• Cisco routers/switches/firewalls

• IPS/IDS modules

• Cisco ISE

• Amazon Cloud

• Data center infrastructure

• Network Enclaves

• Xceedium Gatekeeper

• Riverbed

• Solarwinds

• Cisco Prime

• McAfee

• HP Fortify


• Two Factor Authentication

• Identity and Biometric tools

• Bluecoats


• Troubleshooting Tier 3 & 4 level issues for LAN / WAN networks

• Troubleshooting Enclaves

• Working on Change Requests, Incidents, Work Orders

• Resolving Emergency Break Fix problems

• Ability to work in ServiceNow and use this tool effectively to work

• Understanding the work flows to expedite and provide operations support

• Collaborate with multiple teams for resolving issues

• Maintain documentation for all network infrastructure changes and process flows

o Document all processes and procedures

o Post documents to EID SharePoint site

• Serve as the technical expert for network infrastructure, security tools, appliances and services

• Collaborate with Network Architecture & Engineering teams to recommend solid well thought out solutions

• Responsible for mentoring junior staff and expanding their skill set

• Responsible for leading CIRT calls and outage resolutions


• Expertise in one or more of the following tools and technologies:

o Cisco Network and Security Technologies

o Cisco Wireless Technologies

o Amazon Cloud Services

o Cisco Data Center Technologies

o Riverbed Technology

o Performance Engineering tools and technologies

• Experience serving as an escalation point for network and performance issues and ensuring their resolution

• Experience analyzing and resolving tickets with limited internal/external support

• Strong ability to operate as member of a multi-functional team

• Ability to multi-task and keep track of work

• Must be an expert on subnet masking and IP addressing

• Must understand multi-tier networks and have proven ability to resolve issues

• Must have excellent written and verbal skills in English

• Must have self-motivation and initiative to tackle large problems from start to finish

• Must have excellent time management skills to work in a fast-paced professional environment

• Must have the ability to design solutions that are not cookie cutter

• Must have project management and time management skills

• Must know Visio diagramming and Microsoft office tools suite

• Must be able to work independently and within a matrixed organization

• Must have networking expertise and drive work to closure

• Must have excellent customer service skills and high threshold for stress

• Must want to be in an Operations environment

• Ability to follow directions from management

• Availability to work outside of normal business hours to support a production network

• Must be available to be on call many weeks throughout the year

• Must have excellent team work and collaborations skills

• Ability to maintain composure in a fast paced, high stress, demanding environment

• Current USCIS EOD highly desired

• Experience operating in a DevOps environment for at least twelve months highly desirable


Clearance Requirements – US Citizen with the ability to obtain Public Trust and complete DHS Security Clearance; Ability to obtain DHS EOD suitability or Current DHS EOD preferred.

Location – Bethesda, MD; Stennis, MS

Job Requirements

Requires Bachelor's degree in (Computer Science, Math or Engineering) or equivalent, and five to seven years of related experience.