Millennium Space Systems

Security Specialist/Contractor Program Security Officer (CPSO)

Security - El Segundo, CA - Full Time

Millennium Space Systems delivers affordable, high-performance space systems for exacting customers. At Millennium, you will be part of a close-knit team working on exciting technological problems. Join our world-class team and help create the future of affordable, high-reliability space systems. We work in a fast-paced open environment where ideas are shared across all disciplines, and there are ample opportunities for advancement based on excellence. We are looking for a full-time Security Specialist to join our dynamic team in providing a wide range of administrative support.


  • Perform Communication Security (COMSEC) custodial duties and manage COMSEC account (including inventory, distribution and destruction).
  • Manage personnel security records for DoD collateral clearances, SCI and SAP/SAR programs to include updating the Joint Personnel Adjudication System (JPAS) and providing updates and status on briefed personnel to the Customer.
  • Manage an access quotas system for SAP/SAR programs to include providing monthly status reports, processing Program Access Requests (PAR), performing access eligibility determinations, processing visit certifications, and conducting program indoctrinations and debriefings.
  • Assist with staff assistance visits, security reviews and inspections as well as conducting initial, recurring and refresher security education training.
  • Maintain accountability of controlled documents and media to include active inventory lists, destruction receipts and transfer of documentation.
  • Ensure personnel in secure areas have the necessary clearances; prevent prohibited items from entering secure areas and prevent controlled documents and/or media from exiting the SCIF without approval.
  • Responsible for accreditation of the facility as well as all new or existing facilities; maintain accreditation folders on all facilities, ensure accreditations are accurate and current.
  • Ensure usage of classified and controlled systems comply with all customer defined security requirements and applicable federal regulations.
  • Participate in planning and executing Risk Management Framework (RMF) activities.
  • Support the development of authorization packages needed to obtain and maintain Authority To Operate (ATO), such as the implementation of security controls, planning, writing security procedures and conducting continuous monitoring activities.
  • Review Contract Data Requirements List (CDRL) deliverables for security. This includes, but is not limited to IS & Physical Security Plans, Management Plans and Test Plans. Provide comments and recommendations as required.
  • Review and provide comments for Statements of Work, contracts, RFPs and Security Plans.
  • Prepare DD254s and review DD254s for prime and sub-contractors.
  • Interpret and implement security classification guides during all phases of the acquisition effort. Periodically review proposed industry interfaces, Operations Security (OPSEC) procedures, and legends for continued applicability.
  • Assist with the development of Program Protection Plans (PPP).
  • Review operational requirements and system specification documents to ensure applicable national security requirements are addressed and incorporated into the final system design ensuring the resulting acquisition effort delivers a system that meets accreditation standards.
  • Participate in system design reviews to ensure security requirements are incorporated.  Apply knowledge of security requirements, TEMPEST standards and COMSEC requirements to provide input to developmental engineers involved in the design solution process.
  • Participate in System Security Working Groups.
  • Review Public Release and Freedom of Information Act (FOIA) requests and prepare associated correspondence for the staffing of release requests.
  • Investigate and document security violations/incidents, providing recommendations to the government security official.
  • Develop and maintain Standard Operating Procedures (SOP), providing written correspondence for government signature recommending approval or addressing comments requiring further clarification from the submitter.

Minimum Qualifications: 

  • Must have current Top Secret/SCI security clearance.
  • 5 years of CPSO experience or equivalent with Bachelors.
  • Candidate must be knowledgeable of the following Government policies; NISPOM, DoDM 5205.07 Vol 1-4, DoD SAP Manuals, ICD-705, Sensitive Compartmented Information Facilities (ICD/ICS 705 compliance documents) , DoD 5105.21 Vol 1-3, Sensitive Compartmented Information Security Manual Series, Air Force Manual (AFMAN) 14-304, The Security, Use and Dissemination of Sensitive Compartmented Information  
  • Must be able to relate to a diversified customer base and be knowledgeable of DoD operations.
  • Capable of working as team member simultaneously and be able to function independently and accept responsibility for assigned actions.
  • OPSEC & Program Protection Planning experience


  • Millennium is DDTC-registered, ITAR-compliant Company. This position is located at a facility that requires special access. Applicants MUST be U.S. citizens and eligible for a security clearance. Additionally, applicants must be willing to apply for and maintain a security clearance.
  • We encourage veterans, disabled veterans and disabled individuals to apply for any open position for which they feel they are qualified.
  • We are proud to be an Affirmative Action/Equal Opportunity Employer.
Apply: Security Specialist/Contractor Program Security Officer (CPSO)
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Are you a U.S. citizen?*
Do you have an active SCI, Secret or Top Secret clearance?*
Do you claim dual citizenship with a country other than the U.S.?*
Are any of your immediate family members citizens of a country other than the U.S. or claim dual citizenship?*
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h. Been convicted of any offense involving domestic violence or a crime of violence against your child, dependent, cohabitant, spouse, former spouse, or someone with whom you share a child in common?*
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