Sr. Windows Systems Administrator TS/SCI Poly

Leidos Inc; Corridor North (MD); On-site; USD 116,000 - 210,000; Full time

Benefits offered by this job

Paid Time Off

11 paid Holidays

401K with 6% match

Flexible Schedules

Discounted Stock Purchase Plans

Technical Upskilling

Education and Training Support

Parental Paid Leave

And much more

Job summary

Leidos is seeking a Senior Windows System Administrator to join a high-performance team supporting a complex program. You’ll provide daily systems administration across VMware, Windows and Linux environments with a broad geographic footprint, deploying and sustaining new capabilities while ensuring security and compliance.

A TS/SCI withPolygraph is required. The role involves on-call support, collaboration with diverse workgroups, and implementing IT enhancements in a fast-paced, Agile SAFe

Qualifications

• Bachelor's degree in Computer Science, Information Technology, or a related technical field with 12 years of experience.
• At least 7 years of Windows administration experience.
• At least 7 years of information security management experience (governance, risk, compliance, operational security).
• At least 5 years with: AD/DNS, GPOs, SCCM, Exchange administration and Exchange Management Shell.
• Experience with Windows PowerShell and scripting.
• Strong understanding of security protocols, standards and information security principles.
• Hands-on experience with IAVA management and security scanning.
• Familiarity with Windows/Linux, VMware, networking (switches/routers/LANs).
• Strong analytical skills and team working ability.

Responsibilities

• Monitor test infrastructure systems, applications, and processes; identify, track, and resolve issues.
• Support server, router, and firewall configuration; perform security management and performance tuning.
• Manage IAVA, security scans, and patch deployments across sites; publish status updates to users.
• Plan IT enhancements and support project work; respond to admin and maintenance issues on-call.
• Provide documentation and technical support to partner teams; ensure timely communications and collaboration.

Skills

Windows administration

Active Directory

DNS

Group Policy

PowerShell

Security governance

IAVA management

Windows command line

Linux knowledge

Monitoring and Ops

Education

Bachelor's degree in Computer Science/IT or related field

Tools

VMware

SCCM

Exchange

Ansible

SaltStack

Job description

Description

Senior Windows System Administrator; requires TS/SCI Polygraph up front.

Leidos has a new and exciting opportunity for a Senior Windows System Administrator in our Intel Sector's Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. Join us and make a difference in National Security!

Job Summary

Leidos is seeking a Senior Windows System Administrator to join a high-performing Agile team operating within the Scaled Agile Framework (SAFe) in support of a complex, fast-paced program. In this role, the selected candidate will provide daily systems administration and operations and maintenance support across multiple systems with a broad geographic footprint. Key responsibilities include responding to system engineering requests that support operational requirements, as well as engineering, deploying, and sustaining new capabilities within the environment.

Primary Responsibilities

The selected candidate will be responsible for monitoring test infrastructure systems, applications, and processes to ensure issues are identified, tracked, and resolved in a timely manner. This role also includes supporting server, router, and firewall configuration, as well as performing security management and application performance optimization activities in an environment made up of VMware server hosts, Windows and Linux guest servers, and Virtual Desktop Infrastructure (VDI). Additional responsibilities include:

• * Maintaining multiple virtual server clusters and addressing system scan findings, vulnerability management patching, and Active Directory configuration issues.
• * Using enterprise monitoring tools to detect, assess, and respond to alerts.
• * Providing technical support to partner workgroups on overlapping efforts while maintaining strong interdepartmental collaboration.
• * Managing Information Assurance Vulnerability Alerts (IAVAs) and system security scanning in accordance with applicable System Security Plans, ensuring vulnerabilities are identified and remediated quickly and accurately.
• * Initiating IAVA responses and system security scans, completing remediation actions, deploying patches and security updates to designated sites, and executing monthly security scans.
• * Identifying and resolving hardware and software problems.
• * Proactively notifying customers when test infrastructure delays may affect their ability to complete business functions on time and communicating system outages and publishing status updates to users, as needed.
• * Authoring and maintaining clear, accurate, and concise documentation.
• * Responding to calls and emails in a timely and professional manner.
• * Planning and implementing IT enhancements and supporting project-related work.
• * Responding to system administration, operations, and maintenance issues on an on-call basis when required.

Basic Qualifications

• * Bachelor's degree in Computer Science, Information Technology, or a related technical field and 12 years of prior relevant experience. Additional experience may be substituted for a degree.
• * Must have at least 7 years of Windows administration experience.
• * Must have at least 7 years of experience in information security management, with demonstrated expertise in security governance, risk management, compliance, and operational security functions.
• * Must have at least 5 years of experience with each of the following:
  • o Implementing and managing Windows Active Directory and DNS environments
  • o Creating and managing Group Policy Objects (GPOs)
  • o Microsoft SCCM
  • o Microsoft Exchange administration and Exchange Management Shell
• * Must have experience with Windows Command Line, PowerShell, and PowerShell scripting.
• * Strong understanding of advanced security protocols, standards, and information security principles is a must.
• * Experience with software and security architectures.
• * Hands-on experience with IAVA management.
• * Hands-on experience supporting users, optimizing system operations, and monitoring enterprise IT systems.
• * Commitment to best practices, including compliance with maintenance windows and change control procedures.
• * Familiarity with Windows and Linux operating systems, VMware, and networking technologies including switches, routers, LANs, and cabling.
• * Must have strong analytical skills, attention to detail, and the ability to work effectively both independently and as part of a team.

* Clearance Required: Must have TS/SCI with Polygraph.

Preferred Qualifications

• * Experience documenting and supporting security accreditation and certification activities.
• * Experience with network security technologies, including multi-domain solutions, PKI, SSPs, and vulnerability assessments.
• * Experience with data center design and configuration, including rack-and-stack, power planning, and equipment placement.
• * Experience with VMware.
• * Experience using automation tools such as Ansible or SaltStack.
• * Experience serving in a System Administrator role supporting software configuration management and development environments.

Benefits

• Paid Time Off
• 11 paid Holidays
• 401K with a 6% company match and immediate vesting
• Flexible Schedules
• Discounted Stock Purchase Plans
• Technical Upskilling
• Education and Training Support
• Parental Paid Leave
• and much more

Health and Wellness programs, Income Protection, Paid Leave and Retirement.

Pay Range

Pay Range $116,350.00 - $210,325.00

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.

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.