Linux Administrator

Closure Technologies; Chantilly (VA); On-site; USD 150,000 - 190,000; Full time

Job summary

Closure Technologies is seeking a senior Linux systems engineer with TS/SCI clearance and polygraph to manage and harden Linux server environments. The role involves planning, testing, installing, and maintaining OS versions, performing patch management, and collaborating with multiple teams across the organization.

The candidate will design environments, manage lifecycles, and ensure secure, scalable infrastructure while documenting all configurations and procedures.

Qualifications

• Bachelor’s Degree in Computer Science, Information Systems, Engineering, or other related discipline, OR 10 years of related technical experience may be substituted for education.
• 10+ years configuring and maintaining Linux servers (implied by responsibilities)
• Experience with domain accounts management, LDAP, and Active Directory

Responsibilities

• Plan, test, install, integrate, and maintain OS versions
• Build and harden Linux servers; establish configuration baselines
• Apply security patches and maintain patch management plans
• Develop test plans and procedures
• Replace server hardware components when needed
• Test and integrate software/hardware
• Manage OS lifecycles
• Create, test, and operate environments
• Design interfaces to external systems
• Troubleshoot OS problems and collaborate across teams
• Provide technical support for integration into the OS
• Update documentation on OS configurations and responsibilities

Skills

Shell scripting

Linux administration

Server engineering

Communication

Education

Bachelor's Degree in CS/IS/Engineering

Job description

Closure Technologies is an innovative IT consulting and software engineering company that helps government organizations solve complex technical challenges. The company specializes in custom software development, cloud infrastructure, cybersecurity, systems integration, and data analytics, delivering scalable solutions that improve operational efficiency and drive mission success. With a collaborative and problem-solving culture, Closure Technologies is committed to building high-impact technology solutions that are delivered on time, within budget, and tailored to each client’s unique needs.

Clearance Requirement: TS/SCI with Polygraph

Key Responsibilities:

• Planning, testing, installing, integrating, and maintaining new and upgraded versions of the relevant operating systems
• Building and hardening Linux servers, and establishing configuration baselines
• Applying all appropriate security and firmware patches in a timely manner, and assisting in creating, maintaining, and adhering to the organization’s patch management plans
• Developing test plans and procedures
• Replacing server hardware components where necessary
• Testing and integrating software and hardware
• Managing operating system lifecycles
• Establishing, developing, testing, staging, and operating environments
• Designing interfaces to external systems
• Researching and resolving operating system problems efficiently and accurately, while adhering toorganizational standards and practices
• Troubleshooting operating system problems, and collaborating with other teams (e.g. application development,network, etc.) to resolve problems across the organization
• Providing technical support to other teams (e.g. application development, etc.) on requirements for integrationinto the operating system
• Maintaining and updating documentation on the operating system configuration and all other areas of responsibility

Required Qualifications:

• TS/SCI w/ Polygraph
• Minimum of 10 years configuring and maintaining Linux servers
• Bachelor’s Degree in Computer Science, Information Systems, Engineering, or other related discipline, OR 10years of related technical experience may be substituted for education
• Experience working in an organization with complex, intertwined systems and data flows
• Experience creating, maintaining, and communicating complex information technology documentation
• Experience with domain account management, particularly via Centrify, LDAP, and Active Directory
• Experience applying security patches in a Linux environment
• Strong shell scripting experience
• Ability to manage a large, complex server environment
• Experience with the server environment, its hardware components and how/where they are used
• Understanding how to troubleshoot and replace server hardware if necessary
• Strong communication and collaboration skills to work effectively and proactively across a large organization of dispersed teams

As set forth in Closure Technologies’s Equal Employment Opportunity policy,we do not discriminate on the basis of any protected group status under any applicable law.

If you believe you belong to any of the categories of protected veterans listed below, please indicate by making the appropriate selection. As a government contractor subject to the Vietnam Era Veterans Readjustment Assistance Act (VEVRAA), we request this information in order to measure the effectiveness of the outreach and positive recruitment efforts we undertake pursuant to VEVRAA. Classification of protected categories is as follows:

A "disabled veteran" is one of the following: a veteran of the U.S. military, ground, naval or air service who is entitled to compensation (or who but for the receipt of military retired pay would be entitled to compensation) under laws administered by the Secretary of Veterans Affairs; or a person who was discharged or released from active duty because of a service-connected disability.

A "recently separated veteran" means any veteran during the three-year period beginning on the date of such veteran's discharge or release from active duty in the U.S. military, ground, naval, or air service.

An "active duty wartime or campaign badge veteran" means a veteran who served on active duty in the U.S. military, ground, naval or air service during a war, or in a campaign or expedition for which a campaign badge has been authorized under the laws administered by the Department of Defense.

An "Armed forces service medal veteran" means a veteran who, while serving on active duty in the U.S. military, ground, naval or air service, participated in a United States military operation for which an Armed Forces service medal was awarded pursuant to Executive Order 12985.

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