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Job #: R-00020981
Location: Lorton, VA
Category: Network Administration and Ops
Schedule (FT/PT): Full Time
Travel Required: No
Shift: Standard Plus On Call
Potential for Telework: No
Clearance Required: Top Secret
Referral Eligibility: Ineligible
Group: Civil


Job Description:

The Department of Homeland Security (DHS) has a continuing requirement for Secure Enterprise Network Systems, Services, & Support (SENS3) for the continued operations and maintenance and evolution of the Homeland Secure Data Network (HSDN) and the Classified Local Area Network (C-LAN).

Supporting the SENS3 management team, the candidate will monitor and support network and firewall operations for SENS3 Operational Networks. The candidate will provide operation and maintenance support, including:

  • Support user requirements as requested/required;
  • Perform periodic COMSEC maintenance activities;
  • Provide operational network and firewall support for the Enterprise networks;
  • Conduct network and firewall configuration changes;
  • Provide on call support as needed;
  • Provide input on network design, maintain supporting documentation;
  • Track firewall configuration changes
  • Perform onsite installation and troubleshooting



Primary Responsibilities

  • Conduct configuration changes on Cisco and Juniper routers and switches
  • Configure load balancers
  • Assist with COMSEC maintenance
  • Network documentation
  • Conduct firewall rule set changes

Basic Qualifications

  • Bachelors Degree and 4+ years of experience in network and firewall administration, or 4 years additional experience in lieu of degree
  • Excellent oral and written communication skills;
  • Experience conducting equipment installation and testing;
  • Knowledge/Experience with ITSM tools (i.e. Remedy, ServiceNow, etc.).
  • Experience with Juniper and Cisco routers and switches
  • Experience with firewall and load balancer configuration
  • Must be able to obtain and maintain a TS/SCI clearance

Preferred Qualifications

  • DHS Experience
  • Experience with COMSEC operations
  • Experience with F5, Palo Alto

External Referral Bonus:


Potential for Telework:


Clearance Level Required:

Top Secret



Scheduled Weekly Hours:



Standard Plus On Call

Requisition Category:


Job Family:

Network Administration and Ops


Leidos is a Fortune 500® information technology, engineering, and science solutions and services leader working to solve the world's toughest challenges in the defense, intelligence, homeland security, civil, and health markets. The company's 33,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Virginia, Leidos reported annual revenues of approximately $10.19 billion for the fiscal year ended December 28, 2018. For more information, visit

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All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

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