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Information Systems Security Manager (ISSM)

Mercury Systems
United Statesfull_timeVerifiedPosted 23 Jun 2026

About the role

 

Job Summary:

This role will serve as the Information Systems Security Manager (ISSM) for the Torrance and Cypress, CA facilities.  The ISSM is responsible for maintaining the overall system security posture of classified programs and technical security capabilities at Mercury sites. The ISSM manages the process to protect classified information. Primary function is the implementation of all classified security policy, procedures, and government security requirements required by the United States Government. Additionally, the ISSM is responsible for the implementation of the Department of Defense (DoD) Risk Management Framework (RMF), outline classified security policies and procedures and assures compliance with all applicable government regulations. The ISSM will work closely with the Corporate Security team to ensure compliance with DoD and other U.S. Government system requirements.

 

Primary Responsibilities:

 

  • Collaborate with the Corporate ISSM to ensure all accredited information systems meet RMF requirements.
  • Prepare, maintain, and upload System Security Plans (SSPs) and supporting artifacts in eMASS.
  • Ensure SSPs accurately reflect system configuration and required security controls.
  • Support certification testing and assessments conducted by the Cognizant Security Agency (CSA).
  • Develop and maintain procedures supporting Configuration Management (CM) for security relevant hardware, software, and firmware.
  • Ensure compliance with DoD certification and accreditation requirements, including DoDI 8510.01 (RMF for DoD IT).
  • Install, update, and maintain security-related software tools to detect malicious code, viruses, and unauthorized intrusions.
  • Maintain the physical security for site(s) to include intrusion detection system, access control, CCTV, security locks, and GSA security containers.
  • In partnership with the FSO, implement procedures for marking, handling, transporting, sanitizing, and destroying media containing classified information.
  • Conduct periodic hardware and software inventory assessments. Identifies system security control shortcomings and serves as lead for remediating deficiencies.
  • Conduct audits, performs analysis, and investigates security incidents such as data spills, data integrity and malicious events.

 

Required Qualifications:

 

  • Bachelor’s degree
  • Typically requires 5 years of prior relevant experience
  • Must be a U.S. Citizen
  • Active US Secret security clearance with the ability to obtain Top Secret clearance.
  • Must have Security+ or obtain certification within 6 months of hire.
  • Linux admin experience

Preferred Qualifications:

  • Advanced Degree in a related field
  • Typically requires 3 years experience
  • E Mass Data Base Experience
  • ISSM Certification

 #LI-RL1

 

“This position requires you to access information that is subject to U.S. export regulations.  You may only access such information if you are a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. government.”

 

Qualifications
Why should you join Mercury Systems?

Mercury Systems is a technology company that makes the world a safer, more secure place. We push processing power to the tactical edge, making the latest commercial technologies profoundly more accessible for today's most challenging aerospace and defense missions. From silicon to system scale, Mercury enables customers to accelerate innovation and turn data into decision superiority. Headquartered in Andover, Massachusetts, Mercury employs more than 2,300 people in 24 locations worldwide. To learn more, visit mrcy.com

Our Culture

We are committed to making Mercury a great place to work, no matter where our employees are located. We offer a casual and enjoyable atmosphere that allows employees to learn and grow. We help and care for one another and work as one to achieve results for us and for our customers. We value communication and transparency, and strive to foster two-way dialogue at all levels of the organization. We are commi

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Mercury Systems

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