Job Description

Salary: $87,100 - 157,450 per year Requirements:

• Bachelor's degree and 8 years of related experience or Master's degree and 6 years of related experience. Additional experience, education, and training may be considered in lieu of a degree.
• Active DoD SECRET clearance.
• DoD-8570 IAT Level 2 certification (Security+ CE) within 6 months of the hire date.
• Extensive experience troubleshooting Windows OS or Linux OS, network, and domain-related issues.
• Extensive experience performing system administration tasks including installing, maintaining, monitoring, recovering, rebuilding, upgrading, and patching.
• Extensive experience researching complex technical solutions beyond internal SOPs.
• Experience working with multiple technologies and an openness to learning new technologies.
• Fluent understanding of networking concepts such as OSI Model, LAN/WAN, IPv4/IPv6, subnetting, and VLANs.
• Experience maintaining systems and services in an air-gapped environment.
• Ability to demonstrate good judgment, professionalism, and communicate clearly (both verbal and written).
• Highly proficient problem-solving, critical thinking, and analytical skills.

Responsibilities:

• Provide expert technical knowledge to monitor and maintain an enterprise services environment consisting of Windows servers, Red Hat Enterprise Linux servers, and network appliances.
• Assist mission partners with mobile device VPN connectivity debugging, user account and device management, and troubleshooting system/service access issues.
• Implement and deploy scripting or automation tools to optimize processes and improve efficiency, including PowerShell, Python, Bash, Ansible, and Puppet.
• Act as a point of escalation for lower-level technicians and higher difficulty issues.
• Lead configuration updates and maintenance activities to patch, secure, and maintain systems.
• Respond to, analyze, and resolve issues that degrade system or network performance to minimize downtime.
• Use advanced systems and networking knowledge to develop solutions for complex technical issues.
• Create and update documentation for common issues and processes, technical drawings, and related artifacts to contribute to the team’s knowledge base.
• Collaborate with other technical experts and external stakeholders to provide engineering solutions for design changes and upgrades.
• Mentor, lead, and train junior-level team members.
• Work non-standard hours (nights, weekends, holidays) in support of 24x7x365 operations and sustainment environment.

Technologies:

• Ansible
• Bash
• Support
• LAN
• Linux
• Mobile
• Network
• PowerShell
• Puppet
• Python
• Security
• VPN
• Windows
• Aruba
• Cisco
• MySQL
• SQL
• VMware

More:

We are the Digital Modernization Sector within Leidos, currently seeking a Senior System Administrator to support the DoD Mobility Classified Capability (DMCC) program as part of GSM-O II in San Antonio, TX. We are looking for a candidate who is experienced and proficient in Windows server and Linux server operations, as well as sustainment and management activities. You will help ensure secure, reliable, and uninterrupted availability of the DoD's secure mobile device capability service. As a Sys Admin subject matter expert (SME), you will work as part of a 24x7 Network Operations team managing an infrastructure comprised of various servers, network appliances, and applications that support voice and data services.

If you are excited about thriving in this kind of environment, we encourage you to apply.

Pay Range:

Pay Range: $87,100.00 - $157,450.00. The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include responsibilities of the job, education, experience, knowledge, skills, and abilities, internal equity, and alignment with market data.

last updated 38 week of 2025

Job Tags

Full time, Night shift, Weekend work,

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