Jobs in the United States

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Added 21 mins ago
2027 Associate Engineer Aeronautical / Engineer Aeronautical
Northrop Grumman
United States
Northrop Grumman is seeking an Associate Engineer Aeronautical / Engineer Aeronautical.
Added 53 mins ago
Microelectronics (ME) Surface Mount Technology (SMT) Circuit Card Assembly (CCA) Engineer
CACI International
Tobyhanna, PA
Job Title: Microelectronics (ME) Surface Mount Technology (SMT) Circuit Card Assembly (CCA) Engineer
Added 53 mins ago
Software Engineer
CassianRx
Bala Cynwyd, PA
Added 57 mins ago
Senior Cloud Security Engineer
Altera Corporation
San Jose, CA
The Senior Cloud Security Engineer is a hands-on technical lead responsible for designing, implementing, and improving security across the organization’s Microsoft Azure and Amazon Web…
Added 1 hour ago
Inside Presales System Engineer
Hewlett Packard Enterprise
Durham, NC
…recommend solutions across wired and wireless networking, network security, routing, SD-WAN, SASE, and cloud-managed networking…
Added 1 hour ago
Inside Presales Systems Engineer
Hewlett Packard Enterprise
Durham, NC
…recommend solutions across wired and wireless networking, network security, routing, SD-WAN, SASE, and cloud-managed networking…
Added 1 hour ago
Principal Front-End Engineer, Design Systems
Hewlett Packard Enterprise
Ft. Collins, CO
…Packard Enterprise, which brings together data, AI, cloud, security, and networking to help organizations achieve…
Added 2 hours ago
CI
IT HelpDesk Tier 2 - AZ
CubX Inc.
Remote, United States
- $55,000 to $75,000 USD / year
…and support to business clients nationwide. As an IT Support Engineer (Tier 2), you will play a critical role in ensuring seamless technology operations for our clients, contributing to…
Added 2 hours ago
CI
IT Project Engineer Tier 2
CubX Inc.
Lakewood, NJ
- $55,000 to $80,000 USD / year
As a Project Engineer, you will be responsible for implementing and delivering technology projects across a variety of client environments. This role is ideal for a hands-on IT professional…
Added 2 hours ago
AT
Infrastructure Server Engineer (Top Secret)
Apex Technology, Inc.
Los Angeles, CA
- $150,000 to $250,000 USD / year
The IT Engineer (Infrastructure Server Engineer) is responsible for the design, implementation, administration, and optimization of Apex’s technology infrastructure. This role encompasses…
Added 2 hours ago
AT
IT Engineer (Active Top Secret)
Apex Technology, Inc.
Los Angeles, CA
- $150,000 to $250,000 USD / year
The IT Engineer is responsible for the design, implementation, administration, and optimization of Apex’s technology infrastructure. This role encompasses systems engineering, network…
Added 3 hours ago
C
Senior Applications Engineer
Credence
Remote, United States
- $150,000 to $180,000 USD / year
…solutions save agencies thousands of hours, safeguard national security, and strengthen health and humanitarian missions worldwide. With more than 1,700+ team members, 1,500+ AI & data…
Added 3 hours ago
Avionics Engineer B-2 (WBZ) 01.6.14 & 01.6.28
Credence
WPAFB, OH
…solutions save agencies thousands of hours, safeguard national security, and strengthen health and humanitarian missions worldwide. With more than 1,700+ team members, 1,500+ AI & data…
Added 3 hours ago
Systems Engineer B-2 (WBZ) 01.6.07
Credence
Tinker Air Force Base, OK
…solutions save agencies thousands of hours, safeguard national security, and strengthen health and humanitarian missions worldwide. With more than 1,700+ team members, 1,500+ AI & data…
Added 3 hours ago
Engineer IV - Svcs RF
Ericsson
WA
Ericsson is looking for an experienced RF Engineer to join the MACS team in the USA. In this role, you will serve as a subject matter expert in RF optimization, lead engineering teams…
Added 3 hours ago
Sentinel - Systems Engineer (20086)
Northrop Grumman
Roy
Northrop Grumman Defense Systems is seeking a Systems Engineer to join our team. This position will be located at Roy, UT to support the Sentinel (GBSD) program in the Strategic Deterrent…
Added 3 hours ago
Group Manager, Water Resources Engineering
CP Engineers
Remote, United States
Added 3 hours ago
Group Manager, Water Resources Engineering
CP Engineers
Remote, United States
Added 4 hours ago
Lead Software Engineer
Mojo AI
Sandy, UT
We are seeking an experienced and highly skilled Lead Software Engineer to join our team. As the team’s technical lead, you will guide general team processes and ensure quality across both…
Added 4 hours ago
IT Support Engineer
CorDx
Alpharetta, GA
The IT Support Engineer will be responsible for providing technical support and assistance to computer systems, hardware, software, and networks. Their responsibilities include but are not…
Added 4 hours ago
EC
Commercial Engineer and Codes & Standards Manager
Eaton Corporation
Ellisville, MO
- $146,000 to $215,000 USD / year
Eaton’s ES AMER PCS division is currently seeking a Commercial Engineer and Codes & Standards Manager. This role will take place out of Ellisville, MO with a hybrid schedule (3 days on-site…
Added 4 hours ago
Engineer II (3492)
Honeywell
Kansas City, MO
Added 4 hours ago
SSD Mfg NPI Product Engineer, Nitro SSD
Amazon Data Services, Inc.
Seattle, WA · Cupertino, CA
…investigating any early-life product failures. This role requires the engineer to be a technical contact and take on full ownership of the manufacturing launch and resolution of process…
Added 4 hours ago
Software Engineer II - Building Applications
Pacific Northwest National Laboratory
Jefferson City, MO
Our Science & Technology directorates include National Security, Earth and Biological Sciences, Physical and Computational Sciences, and Energy and Environment. In addition, we have an…
Added 5 hours ago
Mojo Libraries Engineer (Copy)
Modular
Remote, United States
We are looking for a motivated engineer to join the Hardware Enablement team at Modular. In this role you will work across the Modular software stack, from Mojo kernels and the graph…

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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