Senior Systems Administrator

Modern Technology Solutions, Inc. (MTSI); Dayton (OH); On-site; USD 110,000 - 140,000; Full time

Job summary

Modern Technology Solutions, Inc. (MTSI) seeks a Systems Administrator to support a government customer at WPAFB, OH, in person. Install, configure, and maintain Linux and Windows systems, and build cloud/hybrid infrastructure for AWS GovCloud and Azure Government.

Responsibilities include backups, DR, monitoring, and documentation while aligning with RMF, DISA STIGs, and NIST 800-53. Strong collaboration and problem-solving are essential.

Qualifications

• 6+ years of Linux experience (Red Hat/CentOS/Ubuntu).
• Experience administering Windows servers in enterprise environments.
• Cloud experience with AWS and Azure.
• Ability to configure and stand up systems with group policy and security controls.
• Strong troubleshooting, communication, and collaboration skills.
• Experience supporting test or R&D environments and working with DoD stakeholders.

Responsibilities

• Install, configure, and maintain Linux/Windows systems and virtual environments.
• Perform system hardening per RMF, DISA STIGs, and NIST 800-53.
• Troubleshoot hardware and software issues and provide end-user support.
• Manage user accounts, permissions, and access controls.
• Implement backups and disaster recovery procedures.
• Monitor performance and collaborate to improve system stability.

Skills

Linux system administration

Windows Server administration

Cloud (AWS/Azure)

Security/compliance RMF/STIGs

DevSecOps tooling

Documentation & communication

Troubleshooting

Team collaboration

Education

Master's degree in IT-related field

Bachelor's degree with relevant experience accepted

CompTIA Security+

Tools

VMware

KVM

GitLab

Artifactory

Jira

Confluence

Nessus

Tenable SC

ACAS

Job description

How you will contribute to our National Security and Defense mission:

MTSI is seeking a highly motivated and experienced Systems Administrator to support our team in safeguarding information systems for a government customer at WPAFB, OH. This individual will be responsible for the installation, configuration, maintenance, and troubleshooting of Linux and Windows-based systems in a secure environment. This individual will also be responsible for building out cloud and hybrid cloud infrastructure including the designing of cloud-native architectures targeted for AWS GovCloud, Azure Government, and high-side on-premises virtualized data centers. This role is an in-person role that is located with our government customer’s organization at WPAFB.

You’ll be a great fit for this role if:

• You have a passion for information technology, defense, and space systems and advanced technologies.
• You understand the urgent need to modernize our defense systems and give our troops the best possible tools.
• Paying attention to detail and providing excellent customer service in a professional environment is a skill you excel at.
• You are passionate about continuous learning and growth, and you seek opportunities to challenge yourself.
• You are driven to make a meaningful impact through your work.

Responsibilities

Your essential job functions will include but may not be limited to:

• Install, configure, and maintain operating systems, hardware, virtual environments, and network devices to meet program needs
• Perform system hardening to ensure compliance with established security policies
• Troubleshoot and resolve hardware and software issues
• Manage user accounts, permissions, and access controls
• Implement and maintain system backups and disaster recovery procedures
• Monitor system performance and identify areas for improvement
• Collaborate with other IT staff to ensure system stability and availability
• Provide technical support to end-users
• Maintain accurate documentation of system configurations and procedures
• Install and maintain DevSecOps tools (GitLab, Artifactory, etc.)
• Install and maintain Atlassian suite of tools (Jira, Confluence, Mattermost)
• Install and maintain ACAS suite of tools (Nessus, Tenable SC, etc.)
• Working knowledge of compliance frameworks such as RMF, DISA STIGs, and NIST 800-53

Qualifications Required

• Working knowledge of Windows server administration
• 6+ years of experience administering Linux systems (e.g., Red Hat, CentOS, Ubuntu)
• Cloud experience including AWS and Azure
• Experience with system standup and configuration including group policy
• Excellent troubleshooting and problem-solving abilities
• Strong communication and interpersonal skills
• Stay current with emerging technologies and best practices in systems administration
• Previous work supporting test or research and development environments
• Coordinate with program stakeholders, engineers, and other IT professionals to align system capabilities with mission objectives
• Provide technical expertise and recommendations for system improvements and upgrades
• Must have in-depth knowledge of DoD, National and applicable service and agency security policy, manuals and standards. Must have the ability to work in a dynamic environment and effectively interact with numerous DOD, military/civilian personnel and industry partners

Education

• Master's degree in an IT-related field
• Bachelor's degree and relevant professional experience can be accepted in lieu of a master's degree
• Required Certifications: CompTIA Security+

Even Better If You Have These Desired Skills

• Experience as a Data Transfer Agent (DTA)
• Experience with virtualization technologies (e.g., VMware, KVM).
• Experience with configuration management, automation tools, and scripting languages (e.g., Ansible, Bash, Python, Puppet, Chef)
• Experience with Containerization and Orchestration tools (e.g., Kubernetes, K8S, K3S)
• Certifications: ISC2 CCSP; CompTIA SecurityX (CASP+), AWS Certified DevOps Engineer - Professional, Azure DevOps Engineer Expert, or CKA (Certified Kubernetes Administrator)

Clearance Requirements

• Must possess an active DoD Top Secret (TS) security clearance (with SCI and SAP eligibility).