Cyber Security Engineer / ISSO Protect and Strengthen MissionCritical Systems

Leidos is seeking a Cyber Security Engineer / Information Systems Security Officer (ISSO) to support a highimpact missionessential this role youll work closely with the Information System Security Manager (ISSM) and system owners to ensure that critical IT systems remain secure compliant and resilient against evolving threats. If youre driven by precision cybersecurity excellence and safeguarding nationallevel systems this position puts you at the center of the mission.

Youll apply your expertise in the Risk Management Framework (RMF) system hardening and security assessments to help maintain compliance with DoDI 8510.01 while guiding teams through secure operations and continuous improvement.

What Youll Do

As a key cybersecurity leader youll assess secure and monitor complex IT systems while shaping the security posture of the program.

Your responsibilities include:

• Performing full ISSO duties by establishing and administering security systems policies and procedures in alignment with government directives and contractual requirements

• Conducting security audits and compliance checks under DoDI 8510.01

• Performing risk and vulnerability assessments on Cisco Juniper Windows and Linux systems

• Promoting security awareness and communicating deficiencies to the ISSM and ISSO team

• Recommending and implementing security programs to ensure users understand and follow cybersecurity policies

• Assessing security events determining impact and implementing corrective actions

• Ensuring rigorous application of cybersecurity principles across all IT services

• Supporting the development of RMF documentation including SSPs SOPs POAMs and security assessments

This role is ideal for someone who thrives in a structured highstakes environment and enjoys applying cybersecurity expertise to protect missioncritical systems.

Required Qualifications & Skills

You bring a strong cybersecurity foundation handson technical experience and the ability to operate independently in a dynamic environment.

• Active DoD TS/SCI clearance

• Current DoD 8140compliant security certification; ability to obtain CE certification within 6 months

• Bachelors degree and 6 years of cybersecurity ISSO experience (or equivalent experience/certifications)

• Strong understanding of cybersecurity policies principles and best practices

• Experience writing RMF package documentation

• Deep familiarity with DoDI 8510.01 NIST 80053 and the ATO process

• Experience with Assessment & Authorization (A&A) documentation and audits

• Knowledge of STIGs CIS Benchmarks and secure configurations

• Experience performing risk and vulnerability assessments and documenting remediation steps

• Familiarity with automated scanning tools such as Tenable Nessus SCAP or similar

• Experience participating in security evaluations audits and reviews

• Ability to learn new technologies and adapt quickly

• Strong written and verbal communication skills

• Ability to manage multiple tasks in a fastpaced environment

Preferred Qualifications

These skills will help you stand out:

• Industry certifications such as CySA CASP CISSP or equivalent

• Experience securing complex network topologies

• Familiarity with Agile methodologies (SCRUM Kanban)

• Experience with Atlassian tools (JIRA Confluence Bitbucket)

• Experience with Splunk Tenable Nessus SCAP tools

• Linux and Windows administration experience

• Ability to navigate Linux directories and execute scripts

#DINM

If youre looking for comfort keep scrolling. At Leidos we outthink outbuild and outpace the status quo because the mission demands it. Were not hiring followers. Were recruiting the ones who disrupt provoke and refuse to fail. Step 10 is ancient history. Were already at step 30 and moving faster than anyone else dares.

If youre looking for comfort keep scrolling. At Leidos we outthink outbuild and outpace the status quo because the mission demands it. Were not hiring followers. Were recruiting the ones who disrupt provoke and refuse to fail. Step 10 is ancient history. Were already at step 30 and moving faster than anyone else dares.

Original Posting:

Pay Range:

The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job education experience knowledge skills and abilities as well as internal equity alignment with market data applicable bargaining agreement (if any) or other law.