Linux System Administrator

Leidos Inc; Town of Ossining (NY); On-site; USD 92,000 - 167,000; Full time

Job summary

Leidos is seeking a System Administrator to support a large enterprise IT contract for the DoD. The role involves administering Linux and Windows servers within a VMware environment and providing 24/7 support. You will work with a team to analyze incidents, implement fixes, and improve system performance.

Candidates should have foundational cloud knowledge (AWS/Azure), VMware experience, and DoD 8570.11 Level II certification or equivalent. TS/SCI with polygraph eligibility is preferred.

Qualifications

• Foundational knowledge of AWS or Azure cloud services.
• Experience administering Linux and Windows servers in VMware environments.
• DoD 8570.11 IAT Level II certification or equivalent.

Responsibilities

• Interact with customers to handle service inquiries and problems.
• Provide technical support, administration, and monitoring of Linux, Microsoft, and Mac systems within VMware.
• Troubleshoot and maintain IT systems; distinguish user problems from enterprise issues.
• Coordinate with customers to collect data and implement incident resolutions.
• Develop solutions to complex technical issues and provide root cause reports.
• Support 24/7/365 operations and be on-call during outages.

Skills

Customer interaction

Problem solving

Time management

Education

Bachelor's degree + 8 years of relevant experience

Master's degree + 6 years of relevant experience

Associate's degree + 10 years

High school diploma + 12 years

Tools

AWS

Azure

VMware

Linux

Windows Server

PowerShell

PowerCLI

ServiceNow

Dell VXRail

Ansible

Puppet

Chef

Job description

Description

Looking for an opportunity to make an impact?

At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers' success. We empower our teams, contribute to our communities, and operate sustainable. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business.

If this sounds like a mission you want to be a part of, keep reading!

Leidos is seeking a System Administrator to support a large enterprise IT contract for the DOD.
This role requires an individual that has technical experience with administering Linux and Windows servers within a VMware virtual environment. This individual should be detail oriented in order to capture customer inquiries appropriately. This role is responsible for interacting with other administrators to handle service inquiries and problems. Duties include examining customer problems and suggesting and implementing appropriate corrective action to initiate a repair or return to service. This role analyzes recurring problems and initiates solutions for preventing reoccurrence and analyzes existing infrastructure for tuning/performance enhancements. The individual will provide systems and software operations and maintenance support in a large, multi-enclave enterprise environment. This individual will work in a team environment to ensure mission needs are met and ensure functionality of capabilities of customers. Individuals in this role may be required to perform technical software configuration, rebooting, and other remedial actions on customer servers.

Primary Tasks

• Experience with interacting with customers to handle service inquiries and problems.
• Provide technical support, administration, and monitoring of Linux, Microsoft, and Mac systems within a VMware virtual environment.
• Provide support for the implementation, troubleshooting and maintenance of IT systems. Rapidly distinguish isolated user problems from enterprise-wide application/system problems.
• Coordinate with customers and stakeholders to collect data, conduct analysis, develop, and implement solutions associated with incident tickets and requirements.
• Develop solutions to complex technical issues.
• Provide follow-up reports (technical findings, feedback, resolution steps taken) for Root Cause analysis, engineering technical assessment and process improvement initiatives.
• Support customer requirements in a 24/7/365 environment and be able to provide on-call support during outages occurring after hours.
• Update operations and monitoring documentation for 24/7/365 Operations Watch personnel.

Basic Qualifications

• Foundational knowledge of AWS or Azure cloud services and the cloud ecosystem.
• Familiarity with Hyper Converged Infrastructure (HCI) concepts and solutions such as Dell VXRail.
• Experience with Tier 2 system administration of server operating systems such as Linux (CentOS, RHEL, or Ubuntu) and Microsoft Server (2012 R2/2016).
• Familiarity with supporting virtual desktops running Linux, Microsoft Windows, and/or MacOS.
• Experience with Scripting/Automation through Linux Shell scripts, PowerShell, PowerCLI, or other scripting languages.
• Experience troubleshooting issues in a growing environment.
• Experience with log reviews, incident analysis, and identification of issue trends.
• Experience with server patch management methodologies.
• Time management skills with the ability to work within an IT Service Management/ticketing system (ServiceNow) independently.
• Ability to triage and properly classify incidents and prioritize work efforts accordingly.
• Strong oral and written communications skills.
• Track record of working effectively within a team, and support to peers toward improved processes and results.
• Candidate must, at a minimum, meet DoD 8570.11- IAT Level II certification requirements (currently Security+ CE, CCNA-Security, GSEC, or SSCP).

Clearance

• Due to the nature of the government contracts, we support, US Citizenship is required.
• Current TS/SCI with the ability to obtain an maintain a polygraph.

Education/Experience

• The candidate must have bachelor's degree with 8 years of prior relevant experience or a master's degree with 6 years of prior relevant experience, associate's with 10 years, or high school diploma with 12 years.

Preferred Qualifications

• Certification relating to VMware (VCA/VCP), Microsoft Server Administration (MCSA), Linux Administration (Linux+), or Mac Administration (ACSP) a plus.
• Experience with Ansible, Satellite, Puppet, Chef, a plus.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Original Posting: September 9, 2026

Pay Range:Pay Range $92,300.00 - $166,850.00

The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Securing Your Data

Beware of fake employment opportunities using Leidos' name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at [e-mail].

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.