Jobs in the United States

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Added 11 mins ago
Software Engineer - Product (Technical Leadership)
Meta
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Lead long term technical vision and roadmap for large cross-company efforts
Added 12 mins ago
Lead Customer Insights & Data Analyst
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The Customer Insights & Data Analytics Lead Data Analyst is a highly experienced technical resource responsible for leading complex analytical initiatives and translating large internal and…
Added 12 mins ago
Lead Software Developer
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As a Lead Software Developer, they design, develop, test, debug, and enhance software solutions of moderate complexity while collaborating across disciplines to bring ideas to life. They…
Added 27 mins ago
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Added 31 mins ago
2027 Spring Process Engineer Co-op - Doctorate (Gloucester, MA)
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Lead small-scale development projects, analyze results, and present findings to engineering teams.
Added 46 mins ago
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…experience in planning related work, two (2) years of which included lead or supervisory…
Added 56 mins ago
Aladdin Data Implementation Lead, AI-Enabled Delivery - Director
BlackRock
Wilmington, DE
Added 56 mins ago
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Pricing & Profitability Analyst- Home Equity
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- $77,000 to $103,000 USD / year
…Home Equity pricing and credit strategy. This individual will lead and support analytical work related to profitability, portfolio performance, market trends, and competitive intelligence,…
Added 1 hour ago
FAST Lab Senior FPGA Engineer
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Added 1 hour ago
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Added 1 hour ago
Power Automation Developer
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Added 1 hour ago
Infrastructure Solution Architect
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United States
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Added 1 hour ago
AWS Solution Architect
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Lead cloud migrations, virtual infrastructure improvements, workload performance tuning, and resource lifecycle management by leveraging best practices from vendors and security frameworks
Added 1 hour ago
Reliability Engineer
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Houston, TX · San Francisco, CA · San Diego, CA · Chicago, IL · Albuquerque, NM · Boulder, CO
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Added 1 hour ago
Research Senior Associate
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…novo antibody designs in yeast display platform. Independently lead end-to-end discovery campaigns including library construction, FACS selection strategy development, sequencing analysis,…
Added 1 hour ago
Senior Solutions Engineer
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…organizational design, workforce planning, and transformation. You will lead solution development from initial discovery and requirements gathering through implementation, deployment, and…
Added 1 hour ago
Senior Power Apps/Power BI Developer
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Remote, United States
…steps. Our partner is looking for a Senior Power Apps/Power BI Developer based in the United…
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Added 2 hours ago
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Senior Network Developer
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Added 2 hours ago
2027 Spring Process Engineer Co-op - Doctorate (Gloucester, MA)
Applied Materials
Gloucester, MA · Gloucester
Lead small-scale development projects, analyze results, and present findings to engineering teams.
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Sr. IT Application Support Analyst (Level 3 Support)
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FL
● Lead the resolution of complex, critical application incidents, performing root cause analysis and deep diagnostics while maintaining ownership of the client relationship until the issue…
Added 2 hours ago
Platform Engineer
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Participate in production support and incident response, lead root-cause analyses, and implement long-term improvements through automation, documentation, and operational runbooks.
Added 2 hours ago
Modeling Simulation & Analysis Engineer (Level 2)
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Lead teams in technical execution systems analysis and simulation tasks/projects.
Added 2 hours ago
Modeling Simulation & Analysis Engineer 3 or 4 (Principal or Sr. Principal Level)
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Lead teams in technical execution systems analysis and simulation tasks/projects.
Added 2 hours ago
Junior Software Engineer - Remote
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We are seeking a Junior Software Engineer to support a DoD program. The candidate will work with the technical lead and development team to maintain and enhance existing Java-based…

CACI

Information Systems Security Engineer (ISSE) Linux/RHEL

Sterling, VA, United States
Sterling, United States

$86,600 - $181,800 · Full-time

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Job details

Pay: $86,600 - $181,800
Job type: Full-time
Apply by: Apr 27, 2027
Experience: Minimum 2 years of hands-on Linux administration experience, preferably with RHEL 8/9
Posting language: English
Posted: Oct 29, 2026

Original job description

Job Title: Information Systems Security Engineer (ISSE) Linux/RHEL

Job Category: Security

Time Type: Full time

Minimum Clearance Required to Start: TS/SCI

Employee Type: Regular

Percentage of Travel Required: Up to 25%

Type of Travel: Continental US

The Opportunity:

We are seeking a highly motivated, Linux-focused Information Systems Security Engineer (ISSE) to support the security, accreditation, and continuous monitoring of mission-critical systems operating within classified environments. The ideal candidate combines cybersecurity engineering expertise with hands-on Red Hat Enterprise Linux (RHEL) administration skills. This position requires an individual comfortable working directly with Linux systems to implement security controls, troubleshoot configurations, remediate vulnerabilities, and support Risk Management Framework (RMF) compliance. Working alongside systems engineers, software developers, and cybersecurity professionals, you will help design, implement, and maintain secure solutions supporting critical national security missions. This position requires onsite support 100% of the time in Sterling, VA. Domestic and international travel opportunities may be available.

Responsibilities:

Perform hands-on security engineering, configuration, troubleshooting, and hardening of Red Hat Enterprise Linux (RHEL) systems Implement, validate, and maintain DISA STIG compliance, including executing SCAP scans, analyzing findings, and remediating security vulnerabilities Troubleshoot Linux security configurations involving SELinux, SSH, permissions, authentication, system services, and networking Lead and support Assessment and Authorization (A&A) activities to achieve and maintain Authorization to Operate (ATO) under the Risk Management Framework (RMF) Develop and maintain security documentation, including System Security Plans (SSPs), Security Assessment Reports (SARs), Security Control Traceability Matrices (SCTMs), and Plans of Action and Milestones (POA&Ms) Conduct security assessments and continuous monitoring activities aligned with ICD 503, NIST 800-53, CNSSI, and applicable DoD requirements Collaborate with systems, network, software, and DevOps engineers to integrate security requirements throughout the System Development Life Cycle (SDLC) Evaluate system architectures, infrastructure changes, and software configurations to identify security risks and recommend mitigations Develop Bash or Python scripts to automate security compliance, vulnerability assessments, and routine administrative tasks.

Qualifications:

Required:

Required 5+ years of combined experience in cybersecurity engineering, information assurance, Linux systems administration, or related technical disciplines Minimum 2 years of hands-on Linux administration experience, preferably with RHEL 8/9 Practical Linux command-line proficiency, including filesystem management, permissions, user administration, package management (DNF/YUM), systemd services, log analysis, SSH, and basic network troubleshooting Experience implementing Linux DISA STIGs, executing SCAP scans, and performing vulnerability remediation Working knowledge of Linux security technologies, including SELinux, firewalld, authentication, and access controls Experience with Bash scripting and/or Python for system administration or security automation Strong understanding of RMF, ICD 503, NIST 800-53, and the ATO lifecycle DoD 8570/8140 IAT Level II certification (Security+ CE, CySA+, SSCP, or equivalent applicable certification) Bachelor's degree in a technical discipline or equivalent relevant experience Active Top Secret clearance with SCI eligibility.

Desired:

Red Hat Certified System Administrator (RHCSA) or Red Hat Certified Engineer (RHCE) certification. Experience supporting RHEL systems in classified, disconnected, or air-gapped environments. Familiarity with Puppet, Ansible, Red Hat Satellite, or Red Hat Identity Management (IdM/FreeIPA). Experience with ACAS, Nessus, SCAP Compliance Checker, or similar vulnerability assessment tools Experience with Git, GitLab, DevSecOps, and automated compliance solutions Experience supporting Cross Domain Solutions (CDS) or other highly secure mission systems Advanced cybersecurity certifications such as CISSP or CASP+

What You Can Expect:

A culture of integrity. At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation. An environment of trust. CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality. A focus on continuous growth. Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground - in your career and in our legacy.

Pay Range:

There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. Our employees value the flexibility at CACI that allows them to balance quality work and their personal lives. We offer competitive compensation, benefits and learning and development opportunities. Our broad and competitive mix of benefits options is designed to support and protect employees and their families. At CACI, you will receive comprehensive benefits such as; healthcare, wellness, financial, retirement, family support, continuing education, and time off benefits.

The proposed salary range for this position is:

$86,600 - $181,800

CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.

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