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Issm Jobs in California (NOW HIRING)

Mercury Systems

FSO/ISSM

Oxnard, CA · On-site

As the ISSM, you will be responsible for the overall security posture of classified information systems, including configuration, protection, assessment, and accreditation under the DoD Risk ...

mercury

FSO/ISSM

Oxnard, CA · On-site

As the ISSM, you will be responsible for the overall security posture of classified information systems, including configuration, protection, assessment, and accreditation under the DoD Risk ...

Mercury Systems

FSO/ISSM

Oxnard, CA · On-site

As the ISSM, you will be responsible for the overall security posture of classified information systems, including configuration, protection, assessment, and accreditation under the DoD Risk ...

CSV-Taurean

Cybersecurity Team Lead (ISSM)

Monterey, CA · On-site

$145K - $165K/yr

Compliance leadership (ISSM/ISSO) Requirements: * Education: BA/BS with 5+ years OR AA/AS with 7+ years. * Certifications: IAT II. * Experience: 7+ years cybersecurity, with leadership. * Technical ...

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How much do issm jobs pay per year?

As of Sep 1, 2026, the average yearly pay for issm in California is $116,777.00, according to ZipRecruiter salary data. Most workers in this role earn between $93,800.00 and $136,200.00 per year, depending on experience, location, and employer.

What is an ISSM?

An Information Systems Security Manager (ISSM) is responsible for overseeing and implementing cybersecurity policies for an organization's information systems. They ensure compliance with security standards, manage risk assessments, and coordinate with security teams to protect sensitive data. ISSMs work closely with IT and leadership to develop and enforce security strategies that align with regulatory requirements.

What are the typical daily responsibilities of an Information System Security Manager (ISSM)?

An ISSM’s daily responsibilities often include overseeing the implementation and monitoring of security controls, performing regular risk assessments, and ensuring compliance with relevant security policies and regulations. You may also coordinate incident response efforts, review system access logs, and provide guidance to IT staff on best practices. Additionally, ISSMs frequently interact with auditors, senior management, and cross-functional teams to report on security findings and advise on system improvements. This role requires staying current with emerging threats and adapting security strategies to protect organizational assets effectively.

What are the key skills and qualifications needed to thrive in the ISSM position, and why are they important?

To excel as an Information System Security Manager (ISSM), you need a strong background in information security, risk management, and compliance, typically supported by a degree in cybersecurity, computer science, or a related field. Familiarity with security frameworks (such as NIST or ISO 27001), vulnerability assessment tools, and certifications like CISSP or CISM are commonly required. Leadership, attention to detail, and effective communication are important soft skills for managing security teams and collaborating across departments. These skills help ensure organizational data is protected, compliance standards are met, and business operations remain secure.

What is the role of the ISSM?

An ISSM (Information Systems Security Manager) is responsible for developing, implementing, and maintaining an organization's information security program. They oversee security policies, manage risk assessments, and ensure compliance with security standards such as NIST or ISO 27001. The role often requires certifications like CISSP and involves coordinating security efforts across technical and management teams.

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Infographic showing various Issm job openings in California as of August 2026, with employment types broken down into 100% Full Time. Highlights an 94% In-person, and 6% Hybrid job distribution, with an average salary of $116,777 per year, or $56.1 per hour.

FSO/ISSM

Oxnard, CA • On-site

Mercury Systems

8.2

Company rating: 8.2 out of 10

Based on 15 frontline employees who took The Breakroom Quiz

47th of 159 rated electronics manufacturers

Good employer

Paid breaks

Respectful managers

Learn more about Mercury Systemsexternal

Full-time

Re-posted 10 days ago

Job description

Job Summary:
In this role, you will serve as the Facility Security Officer (FSO) for the Oxnard, CA site, with full responsibility for ensuring compliance with the National Industrial Security Program (NISP). In this dual-function position, you will also act as the Information Systems Security Manager (ISSM), overseeing the security of classified information systems across multiple Mercury locations.
As the FSO, you will manage all aspects of NISP compliance, implement and enforce security policies and procedures, and ensure full adherence to U.S. Government requirements. As the ISSM, you will be responsible for the overall security posture of classified information systems, including configuration, protection, assessment, and accreditation under the DoD Risk Management Framework (RMF).
Key responsibilities include aligning security program goals with organizational objectives, assessing and mitigating risk, ensuring regulatory compliance, protecting personnel, information, facilities, and business operations.
Job 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).
  • Maintain facility information system records in eMASS.
  • Develop and maintain procedures supporting Configuration Management (CM) for security relevant hardware, software, and firmware.
  • Conduct risk and vulnerability assessments of classified systems and verify the effectiveness of security controls.
  • 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.
  • Provide Security guidance to and regularly interact with Program Managers, Engineering/Production, Management, and Human Resources.
  • Responsible for the administration and coordination of the DOD and other industrial security programs and activities to ensure compliance with 32 CFR 117 and other government and company security policies and procedures.
  • Coordinate due diligence and risk assessments whose objective is to identify improvements in the existing physical security controls in place for non-NISP security function at assigned facilities.
  • Maintain and provide security classification guidance of DD254's, Security Classification Guides, and other documents related to security requirements for assigned programs.
  • Operate and maintain a security education, training, and awareness program to include indoctrinations, annual refresher training, debriefings, courier, travel, event specific briefings, and OPSEC procedures.
  • Respond to intrusion alarms as needed.
  • Manage physical security for the site, including intrusion detection, access control, CCTV, security hardware, and GSA approved containers.
  • Respond to intrusion alarms as necessary.
  • Be the direct liaison for the facility with the Defense Counterintelligence and Security Agency (DSCA) and other government agencies.

Required Qualifications:
  • Typically requires 4 years of experience in cybersecurity, information systems security, RMF, and Certification & Accreditation (C&A) processes.
  • Active Secret Clearance.
  • Experience working with eMASS and RMF procedures.
  • Demonstrated ability to conduct thorough risk assessments and manage complex documentation.
  • Experience of network assets and peripheral equipment.
  • Maintain facility and personnel information in DISS and NISS.

Preferred Qualifications:
  • Experience with large, multi-facility networks in Windows and Linux environments.
  • Familiarity with cyber incident response, including preservation, containment, and eradication.
  • CISSP, CASP, or similar certification.
  • FSO & ISSM Certification with in 6 months of hire.
  • Master's degree in Information Systems or related field.
  • High initiative, strong attention to detail, analytical skills, and organizational capability.
  • Ability to work effectively both independently and collaboratively.

#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."
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 committed to lifelong learning, offering comprehensive skills training and tuition reimbursement. Whether you're just starting out on your career journey or you are an experienced professional, it's important to us that you feel recognized and rewarded for your contributions.
To find out more about Why Mercury?, or visit the Mercury Community or find answers to general questions at Mercury FAQs
Mercury Systems is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex (including pregnancy), sexual orientation, gender identity, national origin, genetic information, creed, citizenship, disability, protected veteran or marital status.
As an equal opportunity employer, Mercury Systems is committed to a diverse workforce. In order to ensure reasonable accommodation for individuals protected by Section 503 of the Rehabilitation Act of 1973, the Vietnam Veterans' Readjustment Act of 1974, and Title I of the Americans with Disabilities Act of 1990, applicants that require accommodation in the job application process may contact the number below for assistance.
(978) 256-1300
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