Linux Systems Administrator

Overview

At PNNL, our core capabilities are divided among major departments that we refer to as Directorates within the Lab, focused on a specific area of scientific research or other function, with its own leadership team and dedicated budget.

Our Science & Technology directorates include National Security, Earth and Biological Sciences, Physical and Computational Sciences, and Energy and Environment. In addition, we have an Environmental Molecular Sciences Laboratory, a Department of Energy, Office of Science user facility housed on the PNNL campus.

The National Security Directorate (NSD) drives science-based, mission-focused solutions to take on complex, real-world threats to our nation and the world.The PNNL Field Intelligence Element (FIE) is an intelligence component of the Department of Energy (DOE) Office of Intelligence and Counterintelligence Field Intelligence Enterprise.

The FIE Operations Division, part of the National Security Directorate, is comprised of a cohesive team of leaders stewarding the capabilities and resources of the FIE in support of Pacific Northwest National Laboratory, DOE, and other sponsors. The FIE is compliant, strategically proactive, and customer service oriented and offers efficient services and resources to support the FIE mission.

Responsibilities

We are seeking a skilled and motivated Linux Systems Engineer to help design, operate, automate, and improve our Linux-based infrastructure. This role is responsible for maintaining reliable, secure, and scalable systems across on-premises and/or cloud environments.

The ideal candidate has several years of hands-on Linux administration experience, strong troubleshooting skills, and familiarity with automation, monitoring, networking, and cloud technologies. You will work closely with engineering, security, and operations teams to support production services and continuously improve platform reliability.

Responsibilities

• Administer, maintain, and troubleshoot Linux servers and services in production and non-production environments.
• Perform system provisioning, patching, upgrades, configuration management, and lifecycle maintenance.
• Monitor system performance, capacity, availability, and security; respond to alerts and incidents as needed.
• Investigate and resolve complex operating system, application, storage, networking, and performance issues.
• Develop and maintain automation for repetitive operational tasks using tools such as Ansible, Terraform, Bash, or Python.
• Support cloud and virtualized infrastructure, including environments such as AWS, Azure, GCP, VMware, KVM, or similar platforms.
• Manage core Linux services such as DNS, SSH, NTP, LDAP/Active Directory integration, web servers, file systems, and logging.
• Implement and maintain system hardening, access controls, vulnerability remediation, backups, and disaster recovery procedures.
• Partner with security teams to ensure systems meet organizational security and compliance requirements.
• Maintain technical documentation, including system configurations, runbooks, troubleshooting guides, and standard operating procedures.
• Collaborate with software engineering and DevOps teams to improve deployment processes, observability, and platform reliability.

Knowledge, Skills and Abilities

• Experience administering Linux systems in an enterprise, cloud, SaaS, or high-availability environment.
• Strong working knowledge of Linux distributions such as Red Hat Enterprise Linux, Rocky Linux, AlmaLinux, Ubuntu, Debian, or SUSE.
• Experience with Linux system administration concepts, including:
  • User and group management
  • Filesystems, storage, LVM, and permissions
  • Process and service management
  • Package management
  • System logging and troubleshooting
  • Performance tuning and capacity management
• Proficiency with scripting or automation using Bash, Python, or a similar language.
• Experience with configuration management and infrastructure-as-code tools, such as Ansible, Puppet, Chef, Terraform, or similar.
• Familiarity with networking fundamentals, including TCP/IP, DNS, DHCP, routing, firewalls, load balancing, and TLS/SSL.
• Experience with monitoring and logging platforms such as Prometheus, Grafana, Nagios, Zabbix, Datadog, Splunk, ELK/OpenSearch, or similar tools.
• Familiarity with cloud infrastructure and services in AWS, Azure, GCP, or another major cloud provider.
• Strong analytical, troubleshooting, communication, and documentation skills.
• Ability to manage competing priorities and work effectively both independently and as part of a cross-functional team.

Qualifications

Minimum Qualifications:

• BS/BA and 5 years of relevant experience -OR-
• MS/MA or higher and 3 years of relevant experience -OR-
• PhD and 1 year of relevant experience -OR-
• AA and 14 years of relevant experience -OR-
• HS/GED and 16 years of relevant experience
• Demonstrated experience applying theoretical/fundamental computer science concepts through the design, development, configuration, implementation, and maintenance of computer infrastructure and networks

Preferred Qualifications:

• CompTIA Security + Certification.
• Experience with SELinux policy management, troubleshooting, and security context labeling.
• Experience with AIDE for file integrity monitoring, database management, and security auditing.
• Experience with File Access Control Lists (FACLs) for managing granular file and directory permissions on Linux systems.
• Experience working with Docker/Podman.
• Experience working with nVidia/CUDA.
• Experience working with NFS Shares.
• Experience working with CIFS Shares.
• Familiarity with virtualization technologies.
• Familiarity with Tenable Security Center/Nessus.
• Familiarity with configuration baselines (DISA STIGs).

Hazardous Working Conditions/Environment

Not Applicable

Additional Information

This position requires the ability to obtain and maintain a federal security clearance.

A security clearance background investigation includes review of your employment, education, financial, and criminal history, as well as interviews with you and your personal references, neighbors, and co-workers to determine trustworthiness, reliability, and loyalty to the United States. The investigation also examines your foreign connections, drug and alcohol use, foreign influence, and overall conduct.

Requirements:

• U.S. Citizenship
• Background Investigation: Applicants selected will be subject to a Federal background investigation and must meet eligibility requirements for access to classified matter in accordance with 10 CFR 710, Appendix B.
• Drug Testing: All Security Clearance positions are Testing Designated Positions, which means that the applicant selected for hire is subject to pre-employment drug testing, and post-employment random drug testing. In addition, applicants must be able to demonstrate non-use of illegal drugs, including marijuana, for the 12 consecutive months preceding completion of the requisite Questionnaire for National Security Positions (QNSP).

Note: Applicants will be considered ineligible for security clearance processing by the U.S. Department of Energy if non-use of illegal drugs, including marijuana, for 12 months cannot be demonstrated.

Testing Designated Position

This position is a Testing Designated Position (TDP). The candidate selected for this position will be subject to pre-employment and random drug testing for illegal drugs, including marijuana, consistent with the Controlled Substances Act and the PNNL Workplace Substance Abuse Program.

About PNNL

Pacific Northwest National Laboratory (PNNL) is a world-class research institution powered by a highly educated, diverse workforce committed to the values of Integrity, Creativity, Collaboration, Impact, and Courage. Every year, scores of dynamic, driven people come to PNNL to work with renowned researchers on meaningful science, innovations and outcomes for the U.S. Department of Energy and other sponsors; here is your chance to be one of them!

At PNNL, you will find an exciting research environment and excellent benefits including health insurance, and flexible work schedules. PNNL is located in eastern Washington State—the dry side of Washington known for its stellar outdoor recreation and affordable cost of living. The Lab’s campus is only a 45-minute flight (or ~3 hour drive) from Seattle or Portland, and is serviced by the convenient PSC airport, connected to 8 major hubs.

Commitment to Excellence and Equal Employment Opportunity

Our laboratory is committed to fostering a work environment where all individuals are treated with fairness and respect while solving critical challenges in fundamental sciences, national security, and energy resiliency. We are an Equal Employment Opportunity employer.

Pacific Northwest National Laboratory (PNNL) is an Equal Opportunity Employer. PNNL considers all applicants for employment without regard to race, religion, color, sex, national origin, age, disability, genetic information (including family medical history), protected veteran status, and any other status or characteristic protected by federal, state, and/or local laws.

We are committed to providing reasonable accommodations for individuals with disabilities and disabled veterans in our job application procedures and in employment. If you need assistance or an accommodation due to a disability, contact us at careers@pnnl.gov.

Drug Free Workplace

PNNL is committed to a drug-free workplace supported by Workplace Substance Abuse Program (WSAP) and complies with federal laws prohibiting the possession and use of illegal drugs.

If you are offered employment at PNNL, you must pass a drug test prior to commencing employment. PNNL complies with federal law regarding illegal drug use. Under federal law, marijuana remains an illegal drug. If you test positive for any illegal controlled substance, including marijuana, your offer of employment will be withdrawn.

Security, Credentialing, and Eligibility Requirements

As a national laboratory, PNNL is responsible for adhering to the Homeland Security Presidential Directive 12 (HSPD-12) and Department of Energy (DOE) Order 473.1A, which require new employees to obtain and maintain a HSPD-12 Personal Identify Verification (PIV) Credential. To obtain this credential, new employees must successfully complete the applicable tier of federal background investigation post hire and receive a favorable federal adjudication. The tier of federal background investigation will be determined by job duties and national security or public trust responsibilities associated with the job. All tiers of investigation include a declaration of illegal drug activities, including use, supply, possession, or manufacture within the last 1 to 7 years (depending on the applicable tier of investigation). Illegal drug activities include marijuana and cannabis derivatives, which are still considered illegal under federal law, regardless of state laws.

For foreign national candidates:

If you have not resided in the U.S. for three consecutive years, you are not eligible for the PIV credential and instead will need to obtain a favorable Local Site Specific Only (LSSO) Federal risk determination to maintain employment. Once you meet the three-year residency requirement thereafter, you will be required to obtain a PIV credential to maintain employment. The tier of federal background investigation required to obtain the PIV credential will be determined by job duties at the time you become eligible for the PIV credential.

Mandatory Requirements

Please be aware that the Department of Energy (DOE) prohibits DOE employees and contractors from having any affiliation with the foreign government of a country DOE has identified as a “country of risk” without explicit approval by DOE and Battelle. If you are offered a position at PNNL and currently have any affiliation with the government of one of these countries, you will be required to disclose this information and recuse yourself of that affiliation or receive approval from DOE and Battelle prior to your first day of employment.

Rockstar Rewards

Employees and their families are offered medical insurance, dental insurance, vision insurance, robust telehealth care options, several mental health benefits, free wellness coaching, health savings account, flexible spending accounts, basic life insurance, disability insurance*, employee assistance program, business travel insurance, tuition assistance, relocation, backup childcare, legal benefits, supplemental parental bonding leave, surrogacy and adoption assistance, and fertility support. Employees are automatically enrolled in our company-funded pension plan* and may enroll in our 401 (k) savings plan with company match*. Employees may accrue up to 120 vacation hours per year and may receive ten paid holidays per year.
* Research Associates excluded.
**All benefits are dependent upon eligibility.

Click Here For Rockstar Rewards

Notice to Applicants

PNNL lists the full pay range for the position in the job posting. Starting pay is calculated from the minimum of the pay range and actual placement in the range is determined based on an individual’s relevant job-related skills, qualifications, and experience. This approach is applicable to all positions, with the exception of positions governed by collective bargaining agreements and certain limited-term positions which have specific pay rules.

As part of our commitment to fair compensation practices, we do not ask for or consider current or past salaries in making compensation offers at hire. Instead, our compensation offers are determined by the specific requirements of the position, prevailing market trends, applicable collective bargaining agreements, pay equity for the position type, and individual qualifications and skills relevant to the performance of the position.

Minimum Salary

USD $122,100.00/Yr.
Maximum Salary

USD $193,000.00/Yr.

Minimum Qualifications:

• BS/BA and 5 years of relevant experience -OR-
• MS/MA or higher and 3 years of relevant experience -OR-
• PhD and 1 year of relevant experience -OR-
• AA and 14 years of relevant experience -OR-
• HS/GED and 16 years of relevant experience
• Demonstrated experience applying theoretical/fundamental computer science concepts through the design, development, configuration, implementation, and maintenance of computer infrastructure and networks

Preferred Qualifications:

• CompTIA Security + Certification.
• Experience with SELinux policy management, troubleshooting, and security context labeling.
• Experience with AIDE for file integrity monitoring, database management, and security auditing.
• Experience with File Access Control Lists (FACLs) for managing granular file and directory permissions on Linux systems.
• Experience working with Docker/Podman.
• Experience working with nVidia/CUDA.
• Experience working with NFS Shares.
• Experience working with CIFS Shares.
• Familiarity with virtualization technologies.
• Familiarity with Tenable Security Center/Nessus.
• Familiarity with configuration baselines (DISA STIGs).

We are seeking a skilled and motivated Linux Systems Engineer to help design, operate, automate, and improve our Linux-based infrastructure. This role is responsible for maintaining reliable, secure, and scalable systems across on-premises and/or cloud environments.

The ideal candidate has several years of hands-on Linux administration experience, strong troubleshooting skills, and familiarity with automation, monitoring, networking, and cloud technologies. You will work closely with engineering, security, and operations teams to support production services and continuously improve platform reliability.

Responsibilities

• Administer, maintain, and troubleshoot Linux servers and services in production and non-production environments.
• Perform system provisioning, patching, upgrades, configuration management, and lifecycle maintenance.
• Monitor system performance, capacity, availability, and security; respond to alerts and incidents as needed.
• Investigate and resolve complex operating system, application, storage, networking, and performance issues.
• Develop and maintain automation for repetitive operational tasks using tools such as Ansible, Terraform, Bash, or Python.
• Support cloud and virtualized infrastructure, including environments such as AWS, Azure, GCP, VMware, KVM, or similar platforms.
• Manage core Linux services such as DNS, SSH, NTP, LDAP/Active Directory integration, web servers, file systems, and logging.
• Implement and maintain system hardening, access controls, vulnerability remediation, backups, and disaster recovery procedures.
• Partner with security teams to ensure systems meet organizational security and compliance requirements.
• Maintain technical documentation, including system configurations, runbooks, troubleshooting guides, and standard operating procedures.
• Collaborate with software engineering and DevOps teams to improve deployment processes, observability, and platform reliability.

Knowledge, Skills and Abilities

• Experience administering Linux systems in an enterprise, cloud, SaaS, or high-availability environment.
• Strong working knowledge of Linux distributions such as Red Hat Enterprise Linux, Rocky Linux, AlmaLinux, Ubuntu, Debian, or SUSE.
• Experience with Linux system administration concepts, including:
  • User and group management
  • Filesystems, storage, LVM, and permissions
  • Process and service management
  • Package management
  • System logging and troubleshooting
  • Performance tuning and capacity management
• Proficiency with scripting or automation using Bash, Python, or a similar language.
• Experience with configuration management and infrastructure-as-code tools, such as Ansible, Puppet, Chef, Terraform, or similar.
• Familiarity with networking fundamentals, including TCP/IP, DNS, DHCP, routing, firewalls, load balancing, and TLS/SSL.
• Experience with monitoring and logging platforms such as Prometheus, Grafana, Nagios, Zabbix, Datadog, Splunk, ELK/OpenSearch, or similar tools.
• Familiarity with cloud infrastructure and services in AWS, Azure, GCP, or another major cloud provider.
• Strong analytical, troubleshooting, communication, and documentation skills.
• Ability to manage competing priorities and work effectively both independently and as part of a cross-functional team.