Currently, ManTech is seeking a motivated, career and customer-oriented Network Administrator/Engineer to join our team in the Washington, DC. This position supports an extended service operation. You will have the option of three different shifts (Morning, Day or Afternoon/Evenings).

Responsibilities include but are not limited to:

• Perform as a contributor with knowledge and experience in supporting LANs, WANs, communications (VTC and VOIP), VPN, Remote Access and related software/hardware within a multiple classification and multi-platform operating environment.

• Responsible for the integration of a network including assisting in the planning, design, installation, maintenance, management, and coordination of the corporate LAN/WAN.

• Current on most technological developments and applications and helps to evaluate vendor products to make recommendations for purchase.

• Monitor, maintain, troubleshoot, and support firewalls, routers, switches, proxies, VPN, DNS, email, and SD-WAN and cloud routing to include Cisco CSRs;

• Optimize network performance to achieve the desired QoS and KPIs/Service Levels;

• Proactively identify issues, monitor capacity / demand and recommend potential solutions

• Monitor and trace network traffic across multiple boundaries to resolve faults;

• Develop and implement network, VOIP and VTC change requests for firewalls, firewall policies, routing, switching, proxy services, VPN, remote access, DNS, mail, SD-WAN and public cloud service deployments (AWS and Azure).

• Create and manage designs, test plans, RCAs, and AARs;

• Create and maintain secure device configuration baselines;

• Support incident response and project implementation with internal and external teams and third-party vendors;

• Troubleshoot and fix any network device issue as well as support upgrades and/or net new network device or tooling implementations.

• Use a variety of tools to monitor and manage the environment such as Cisco DNA, Cisco Prime, Cisco ISE, Riverbed, Fortinet and Xymon.

• Provide after hours support as needed.

Basic Qualifications:

• A bachelor’s degree in Computer Science or related field

• 2+ years of network related experience

• Demonstrated experience maintaining, troubleshooting, and supporting firewalls, routers, switches, proxies, VPN, DNS, email, and SD-WAN and cloud routing

• Demonstrated experience optimizing networks

• Demonstrated experience creating designs, test plans, RCAs, and AARs

• Hands on experience using Cisco management and monitoring tools such as Cisco DNA, Prime, Firepower, ISE, etc.; Xymon or Fortinet tool suite.

Preferred Qualifications:

• Proficient with ServiceNow

Clearance Requirements:

• Must be a U.S. citizen

• Must obtain a Public Trust clearance; prefer Secret or TS active clearance.

Physical Requirements:

• Must be able to be in a stationary position more than 50% of the time

• Must be able to communicate, converse, and exchange information with peers and senior personnel

• Constantly operates a computer and other office productivity machinery, such as a computer

• The person in this position frequently communicates with co-workers, management, and customers, which may involve delivering presentations. Must be able to exchange accurate information in these situations

• The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc.