Cybersecurity ISSE

Leidos Inc; Beavercreek (OH); On-site; USD 87,100 - 157,450; Full time

Benefits offered by this job

Health and wellness programs

Retirement options

Paid leave

Job summary

Leidos is seeking a cleared Cybersecurity Information System Security Engineer (ISSE) to support multiple programs at Beavercreek, OH near Wright Patterson AFB. You will design and test secure systems across software, hardware, and networks, coordinating with cross-functional teams.

The role emphasizes RMF, NIST SP 800-53A, vulnerability remediation, and secure system integration in lab and flight environments. A TS/SCI clearance and Security+ certification are required.

Qualifications

• Bachelor’s degree in computer science, IT, cybersecurity or closely related field with 4+ years of experience in the Cybersecurity ISSE technical/professional discipline.
• An additional 4 years of experience may be considered in lieu of a degree.
• Experience working in a Software Integration Laboratory environment.
• Strong understanding of Linux systems; ability to write bash scripts and alter Linux security configurations.
• Experience with NIST SP 800-53A and security controls.

Responsibilities

• Engineer cybersecurity solutions into mission systems, software applications, networks, lab environments, and integrated hardware/software platforms throughout the system lifecycle.
• Translate cybersecurity requirements, NIST SP 800-53 controls, RMF objectives, customer requirements, and mission needs into implementable technical designs, configurations, and verification methods.
• Develop, review, and maintain cybersecurity architecture artifacts, including security design descriptions, network diagrams, data-flow diagrams, and system hardening approaches.
• Lead or support vulnerability management activities; interpret scans; coordinate remediation; verify closure.
• Design and implement mitigations for vulnerabilities discovered during system scans and security audits.
• Collaborate with ISSMs, ISSOs, system owners, and customer stakeholders to align implementation with program objectives.
• Participate in design reviews, CPB/engineering review boards, and test readiness events to ensure cybersecurity considerations.

Skills

Bachelor

4+ years experience

US Citizenship

TS/SCI clearance

Security+ 8570

Linux scripting

NIST SP 800-53

RMF

Vulnerability assessment

Tenable Nessus

Lab environment

Communication

Security controls

Scrum/Kanban familiarity

Atlassian tools (JIRA, Confluence)

Splunk/Tenable Nessus/SCAP tools

DoD cryptographic concepts

Education

Bachelor's degree in CS/IT/cybersecurity

Tools

Linux

Bash scripting

Job description

Leidos is dedicated to making the world a safer place by helping our customers in the Defense Industry achieve their critical missions. Our dedicated Defense Group employees are solving critical challenges across the globe. At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers' success. We empower our teams, contribute to our communities, and operate sustainably. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business.

Job Summary

Leidos is looking for a cleared Cybersecurity Information System Security Engineer (ISSE) to work in our Beavercreek, OH near Wright Patterson AFB. This role will support our diverse portfolio of programs through software design and development, hardware interfacing and integration, laboratory experimentation, ground and flight testing to deploy cutting‑edge, next‑generation solutions.

Primary Responsibilities

• Engineer cybersecurity solutions into mission systems, software applications, networks, lab environments, and integrated hardware/software platforms throughout the system lifecycle.


• Translate cybersecurity requirements, NIST SP 800-53 controls, RMF objectives, customer requirements, and mission needs into implementable technical designs, configurations, and verification methods.


• Develop, review, and maintain cybersecurity architecture artifacts, including security design descriptions, network/security boundary diagrams, data flow diagrams, control implementation details, interface descriptions, and system hardening approaches.


• Support cybersecurity design decisions for tactical networking and communications environments, including boundary protection, segmentation, authentication, encryption considerations, logging visibility, and performance or storage tradeoffs in constrained environments.


• Partner with software, hardware, network, and systems engineering teams to design and implement secure configurations, authentication and authorization mechanisms, logging/auditing, encryption, boundary protections, vulnerability mitigations, and secure system interfaces.


• Support secure system integration in Software Integration Laboratory and test environments, including Linux system hardening, scripting/automation, vulnerability remediation, tool integration, and security configuration management.


• Perform technical security assessments of systems, components, and configurations to identify design gaps, implementation weaknesses, vulnerabilities, and cyber risk; recommend and implement engineering‑based remediation plans.


• Lead or support vulnerability management activities, including interpreting Tenable Nessus, SCAP, STIG, ACAS, or similar scan results; validating findings; developing technical fixes; coordinating remediation with engineers; and verifying closure.


• Design and implement mitigations for vulnerabilities discovered during system scans, security audits, integration events, ground testing, and flight‑test preparation.


• Support implementation and validation of security controls, including documenting how controls are technically satisfied, identifying residual risk, and providing objective evidence for RMF authorization packages.


• Participate in design reviews, engineering review boards, configuration control boards, cyber risk reviews, and test readiness events to ensure cybersecurity considerations are addressed before system deployment.


• Develop or contribute to cybersecurity test procedures, security verification methods, risk assessments, and technical inputs for RMF artifacts, POA&Ms, system security plans, and authorization documentation.


• Assess cybersecurity events, anomalies, and system deficiencies to determine technical impact, root cause, mission risk, and corrective actions.


• Collaborate with ISSMs, ISSOs, system owners, and customer stakeholders to align technical cybersecurity implementation with program compliance, authorization, and operational objectives.


• Support continuous improvement of cybersecurity engineering practices, including automation, secure configuration baselines, vulnerability remediation playbooks, and repeatable lab/test environment security processes.

Basic Qualifications

• Bachelor’s degree in computer science, IT, cybersecurity or closely related field with 4+ years of experience in the Cybersecurity ISSE technical/professional discipline. An additional 4 years of experience may be considered in lieu of a degree.


• Must be a US Citizen.


• Must have an active DoD Top Secret clearance with the ability to obtain and maintain TS/SCI.


• Possess a Security+ 8570 certification.


• Experience working in a Software Integration Laboratory environment.


• Strong understanding of Linux systems. Ability to write bash scripts and alter Linux security configurations.


• Strong understanding of information security and cybersecurity policies, principles, and practices in the delivery of all IT services.


• Well versed in the understanding and implementation of security controls within the NIST SP 800-53A.


• Experienced with policies and procedures to ensure information systems confidentiality, integrity, and accessibility.


• Experience in risk and vulnerability assessments of information systems to identify vulnerabilities, risks, and protection needs.


• Experience in documenting system deficiencies and recommending solutions for remediation.


• Familiar with automated vulnerability scans using Tenable Nessus, SCAP, or other similar applications.


• Experience with participating in security evaluations, audits, and reviews.


• Be able to learn and apply new technologies, tools, and engineering practices that support ISSE responsibilities, including secure system design, security control implementation, vulnerability remediation, system hardening, and cybersecurity test/validation activities. Strong desire to grow and learn new technologies.


• Ability to communicate effectively in writing and verbally from informal one-on-one discussions or in a small group environment.


• Ability to work within a dynamic work environment, ability to handle multiple tasks at once (multi-task).

Preferred Qualifications

• Familiar with Agile Methodologies, preferably SCRUM or Kanban.


• Experience with Atlassian tools such as JIRA, Confluence, Bitbucket.


• Experienced with Splunk, Tenable Nessus, SCAP applications and tools.


• Experience supporting airborne, tactical networking, C2/C3/C4ISR, battle‑management, embedded, or other integrated mission‑system environments.


• Experience engineering centralized audit logging, syslog, SIEM, or network security monitoring solutions using tools such as Splunk, Elastic, Security Onion, Zeek, Suricata, rsyslog, syslog-ng, auditd, or similar.


• Familiarity with DoD cryptographic protection concepts, including COMSEC, TRANSEC, key management, secure communications interfaces, and data‑at‑rest protection.

Pay and Benefits

Pay Range: $87,100.00 - $157,450.00.

Employment benefits include competitive compensation, health and wellness programs, income protection, paid leave, and retirement options. More details are available at www.leidos.com/careers/pay-benefits.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.