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BA
Full Stack Developer, Mid
Booz Allen Hamilton
Aurora, CO
- $69,400 to $158,000 USD / year
Bring your full-stack engineering expertise to help modernize OPIR research and development. As a midlevel engineer, you'll build cloudnative microservices, develop scalable frontend…
Added just now
BA
Full Stack Developer, Mid
Booz Allen Hamilton
Aurora, CO
- $69,400 to $158,000 USD / year
Bring your full-stack engineering expertise to help modernize OPIR research and development. As a midlevel engineer, you'll build cloudnative microservices, develop scalable frontend…
Added 10 mins ago
EG
Dev Lead
Eliassen Group
Oklahoma City, OK
- $110 to $120 USD / hour
2+ years as a senior or principal engineer with design, implementation, and operational ownership.
Added 18 mins ago
Principal Threat Detection Operations Engineer
Target
Brooklyn Park, MN
As a Principal Engineer supporting Threat Detection Operations, you set the technical strategy for the detection engineering, platforms, services, integrations, and automations that enable…
Added 19 mins ago
EG
Dev Lead
Eliassen Group
Saint Paul, MN
- $110 to $120 USD / hour
2+ years as a senior or principal engineer with design, implementation, and operational ownership.
Added 32 mins ago
GCP Ansible Kubernetes DevOps Architect
COOLSOFT
Taylorsville, UT
Certifications such as Google Professional Cloud Architect, Google Cloud Associate Cloud Engineer, AWS Certified Solutions Architect, or Microsoft Certified: Azure Solutions Architect
Added 33 mins ago
DevOps Engineer (US Remote)
MOTOROLA INC
SALT LAKE CITY, UT
Added 33 mins ago
EG
Dev Lead
Eliassen Group
Salt Lake City, UT
- $110 to $120 USD / hour
2+ years as a senior or principal engineer with design, implementation, and operational ownership.
Added 44 mins ago
EG
Dev Lead
Eliassen Group
Atlanta, GA
- $110 to $120 USD / hour
2+ years as a senior or principal engineer with design, implementation, and operational ownership.
Added 1 hour ago
Principal Software Engineer – Application Security & AI Trust Architecture
Cisco
San Jose, CA
As a Principal Engineer leading software security, you will be a primary technical authority responsible for defining and driving the security architecture across our software platforms and…
Added 1 hour ago
EG
Dev Lead
Eliassen Group
Sacramento, CA
- $110 to $120 USD / hour
2+ years as a senior or principal engineer with design, implementation, and operational ownership.
Added 1 hour ago
T
Aws Cloud Engineer
TEKsystems
Nashville, TN
- $60 to $65 USD / hour
The client is seeking a Cloud Engineer with a strong AWS foundation to help mature and govern its AWS environment while partnering closely with a small Enterprise Cloud Services team. While…
Added 1 hour ago
EG
Dev Lead
Eliassen Group
Nashville, TN
- $110 to $120 USD / hour
2+ years as a senior or principal engineer with design, implementation, and operational ownership.
Added 2 hours ago
EG
Dev Lead
Eliassen Group
Olympia, WA
- $110 to $120 USD / hour
2+ years as a senior or principal engineer with design, implementation, and operational ownership.
Added 2 hours ago
AD
Senior Product Security Engineer
Antech Diagnostics
Chicago, IL
- $141,000 to $176,000 USD / year
The Sr. Product Security Engineer will be responsible for defining, implementing and enforcing secure coding practices to ensure that software security is embedded early on (shifting left)…
Added 2 hours ago
EG
Dev Lead
Eliassen Group
Springfield, IL
- $110 to $120 USD / hour
2+ years as a senior or principal engineer with design, implementation, and operational ownership.
Added 2 hours ago
EG
Dev Lead
Eliassen Group
Topeka, KS
- $110 to $120 USD / hour
2+ years as a senior or principal engineer with design, implementation, and operational ownership.
Added 2 hours ago
EG
Dev Lead
Eliassen Group
Salem, OR
- $110 to $120 USD / hour
2+ years as a senior or principal engineer with design, implementation, and operational ownership.
Added 2 hours ago
Senior AI Software Engineer
Credence Management Solutions LLC
ROME, NY
…Summary Credence has an immediate need for a Senior AI Software Engineer to join our growing AI and Automation practice. In this role, you will serve as a senior technical contributor…
Added 3 hours ago
AE
Sr Software Engineer I
American Express
New York, NY
- $123,000 to $215,250 USD / year
American Express is looking for a highly skilled, hands-on Senior Java Software Engineer to join the Enterprise Identity Team , focused on delivering secure, scalable, and reliable Identity…
Added 3 hours ago
EG
Dev Lead
Eliassen Group
Albany, NY
- $110 to $120 USD / hour
2+ years as a senior or principal engineer with design, implementation, and operational ownership.
Added 3 hours ago
EG
Dev Lead
Eliassen Group
Columbia, SC
- $110 to $120 USD / hour
2+ years as a senior or principal engineer with design, implementation, and operational ownership.
Added 3 hours ago
RC
Part Time Software Platform Engineer Co-Op (Remote)
RTX Corporation
aurora, CO
- Part-time
Raytheon is hiring SW Platform Engineer Co-Ops as a part of the Raytheon Cooperative Education Program (Co‑op). This is a part-time, remote role targeting senior or postgraduate students…
Added 3 hours ago
Senior Platforms Engineer, Compute, Storage, and Virtualization
Marathon Petroleum Corporation
Denver, CO
…landscape, we are seeking a dynamic and experienced Senior Platforms Engineer to join our Infrastructure Engineering & Operations organization. This role combines deep technical expertise…
Added 3 hours ago
EG
Dev Lead
Eliassen Group
Denver, CO
- $110 to $120 USD / hour
2+ years as a senior or principal engineer with design, implementation, and operational ownership.

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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