MANTECH seeks a motivated, career and customer-oriented **Senior** **Information System Security Engineer (ISSE)** to join our team in **Washington, D.C., Chantilly, VA or Quantico, VA.**

**Responsibilities include, but are not limited to:**

+ Identify information protection needs for an IS and Network Environment. Define IS and Network Environment security requirements in accordance with applicable cybersecurity requirements
+ Design security architectures for use within the IS and Network Environment. Design and develop cybersecurity-enabled products for use within an IS and Network Environment
+ Integrate and/or implement security with Cross Domain Solutions (CDS) for use within an IS and Network Environment
+ Develop and implement security designs for new or existing network system(s). Ensure that the design of hardware, operating systems, and software applications adequately address cybersecurity requirements for the IS and Network Environment
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