• Arlington, VA, USA
  • Salary
  • Full Time

Unissant, Inc. is an innovative solutions development and consulting company committed to delivering simplicity through innovation. We meet this commitment by delivering state-of-the-art enterprise computing and processing solutions to both government and commercial clients. Our workforce continually strives to advance y(our) collective intellect through collaborative fortitude, and we are looking for further talent to join that effort! To learn more about our exciting organization, please visit us at www.unissant.com.

We are seeking a Senior Network/Security Engineer to join our team and support our client in Arlington, VA

When responding to this opportunity, please speak to the relevancy of your work experience in your cover letter.

*This position is contingent upon contract award.

Essential Duties and Responsibilities:

Performs standard project tasks to analyze information security requirements, translate these into security designs, implements these designs, and tests effectiveness. Has working knowledge of standard information security products including firewalls, intrusion detection systems, anti-virus systems, vulnerability testing, and security analysis tools.

Requires competence in all phases of security requirements analysis, and information security system design as well as available products, and management practices. Requires understanding of U.S. Government security policy including Department of Defense and appropriate civil agencies such as NIST, as well as commercial "best practices". Experience includes holding technical responsibility for projects, and a successful history of task accomplishment.

Work experience: 

  • Evaluate, architect, build, and support security infrastructure that detects and responds to threats
  • Provide network and infrastructure security expertise during responses to security incidents
  • Act as the point of escalation for network security systems, to ensure their uptime and availability
  • Work with Security teammates to sustain and improve our client's network security monitoring functions
  • Stay informed of new InfoSec threats, identifying and piloting risk-reduction and mitigation technologies, and then collaborating to get these protections into production without downtime
  • Enhance the analysis of vulnerability data and improve upon remediation strategies
  • Perform forensic InfoSec investigations in the network, to identify attack vectors and mitigation tactics
  • Ensure that communications among data-center security devices are adequately and properly secured, using standard encryption technologies
  • Collaborate with technical teams to identify, resolve, and mitigate vulnerabilities
  • Spread security awareness through tech talks, lunch and learns, and community involvement
  • Provide full lifecycle engineering and management of enterprise-scale security infrastructure. This is everything from R&D to implementation, to support handover and documentation
  • Work with Network and Systems Engineers, and management, to maintain the velocity of application deployments to data centers, while providing innovative security solutions
  • Innovate in melding open-source, proprietary, and cloud-based security technologies for a custom-fit security solution for the client
  • Harden system and network configurations to be resilient against attacks

Job Skills: 

  • Analytical and problem-solving skills
  • Ability to deal with and resolve ambiguity, especially with respect to changing priorities
  • Ability to anticipate problems and take proactive action
  • Ability to adjust personal work style to different situations
  • Identify key barriers/core problems and work with team to apply problem solving skills to deal with any situation
  • Troubleshoot and resolve problems
  • Mentoring Junior and Intermediate level staff in Security engineering


  • Bachelor's Degree preferred or equivalent experience (6+ years)

Certificates, Licenses, and Registrations: 

  • IAT III (CISA, GSE, SCNA, CISSP (or Associate), GCIH)
  • ITIL v3 Foundations preferred
  • Secret Clearance: Current Secret or Interim Secret Clearance Required 

 Communication Skills: 

  • Excellent business and technical communication skills including the following: Email, documentation, presentation, Virtual, Telephone  


  •  Willing to travel occasionally as needed (up to 10%)

Environmental Requirements: 

  • Mainly sedentary work in an office environment.
  • May be required to lift up to ten (10) pounds.
  • Flexible to work extended hours.

The above statements are intended to describe the general nature and level of work being performed by the individual(s) assigned to this position. They are not intended to be an exhaustive list of all duties, responsibilities, and skills required.  Unissant management reserves the right to modify, add, or remove duties and to assign other duties as necessary.  In addition, where applicable and available, reasonable accommodation(s) may be made to enable individuals with disabilities to perform essential functions of this position.

Please note:  Candidates will be required to undergo pre-employment screening. 

Unissant, Inc. is a proud Equal Opportunity Employer! (EOE; M/F/D/V; AA).



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