Linux Systems Engineer Jobs

Linux Systems EngineerThe Linux Systems Engineer will function as part of a team of engineers responsible for designing, building, maintaining, and securing Linux-based systems to ensure reliability, performance, and security across in our secure environments. Responsibilities include installing, configuring, and maintaining Linux operating systems and servers; monitoring system performance, reliability, and security; troubleshooting system, application, hardware, and network-related issues on Linux platforms; developing and maintaining automation scripts using Bash, Python, or similar languages to streamline tasks; performing regular updates, patching, and system hardening to maintain security posture; implementing backup, recovery, and disaster-recovery procedures for Linux environments; collaborating with network engineers and other infrastructure teams to ensure seamless integration and high availability of systems; maintaining documentation related to system configurations, troubleshooting processes, and operational procedures; supporting users and administrators by providing technical guidance and resolving Linux-related issues; managing critical infrastructure services (e.g., DNS, DHCP, LDAP, NTP, mail relays) within Linux environment; architecting and maintaining scalable, highly available Linux infrastructures across physical, virtual, and cloud environments; deploying and managing containerization and orchestration solutions such as Docker and Kubernetes; conducting vulnerability scanning, security audits, and enforcing access controls using SELinux or similar tools; performing root-cause analysis for complex issues involving networking, storage, or application performance; and basic Cisco networking management.Qualifications typically require a bachelor's degree or equivalent, and at least 7 years of related experience. Must have a current TS/SCI security clearance with polygraph CCNA. Desired core technical qualifications include a strong understanding of Linux operating systems, distributions, file systems, kernel concepts, and system architecture; proficiency in Linux system administration, including installation, configuration, maintenance, performance tuning, and troubleshooting; ability to design, configure, and test Linux servers and operating systems; advanced scripting skills (Bash, Python, Perl) for automation and system efficiency; experience with configuration management tools such as Ansible, Puppet, Chef, or similar platforms; solid knowledge of networking protocols, services, and security hardening (DNS, DHCP, firewalls, routing, etc.); familiarity with cloud platforms (AWS, Azure, GCP) and hybrid infrastructure environments; and ability to monitor and maintain system health, performance, and security events across Linux environments. Security & compliance qualifications include implementing security measures, patching, vulnerability remediation, and systems hardening. Experience working within compliance frameworks and audit-ready environments.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: $103,800 - $218,100 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.