Systems Administrator - Tier III (Infrastructure Engineering)

Provides Tier III engineering and advanced troubleshooting for DDSB-managed enterprise platforms, ensuring stability, resilience, and compliance. This role designs and implements complex changes, supports modernization initiatives, and leads root-cause analysis for recurring issues.

Key Tasks & Responsibilities

• Analyze, validate, implement, maintain, and configure enterprise services and tools, including Active Directory, System Center Operations Manager, Quest, related platforms, to minimize impacts to performance and scalability.
• Coordinate with other organizations and MTFs to support directory services operations across the enterprise and document technical solutions as required.
• Provide advanced support for Active Directory services, including schema extensions, sites, services, domains and trusts, Group Policy Objects, and Organizational Units using approved tools.
• Support and maintain Active Directory and Entra ID architectures providing authentication, synchronization, provisioning, and authorization for on-premises and cloud user accounts.
• Validate data encryption services on desktops and laptops for compliance with DHA and DoD policies and support deployment of approved encryption solutions.
• Provide installation and maintenance of physical and virtual servers to enhance efficiency of critical systems to ensure compliance of systems with applicable baseline configurations, security requirements, and operational standards.
• Manage and monitor data encryption services, including deployment, upgrades, policy enforcement, and status reporting in line with maintenance windows.
• Collaborate with DHA and DoD stakeholders to support future data encryption initiatives and modernization efforts.
• Monitor enterprise system uptime using Microsoft SCOM and maintain monitoring frameworks for applications, servers, and services requiring enterprise visibility.
• Analyze enterprise monitoring implementations and provide status reports before and after engineered remediation actions.
• Customize monitoring rules, alerting, and reporting and produce performance reports depicting uptime and downtime indicators.
• Maintain disaster recovery capabilities and procedures and ensure enterprise monitoring servers comply with applicable DISA STIG requirements.
• Implement and maintain Public Key Infrastructure and Public Key Encryption services in Windows environments in compliance with DoDI 8520.02 requirements.

Education & Experience

• Bachelor's degree in Information Technology, Cybersecurity, Computer Science, Data Science, Engineering, Mathematics, or a closely related discipline or equivalent practical experience (as permitted by the contract).
• Minimum 4 years of relevant experience supporting enterprise IT environments, with demonstrated work aligned to Tier 3 Level Systems Administration Support Services.

Certifications

• At least one: Cloud+, GICSP, SSCP, Security+, or GSEC.
• Alternate/equivalent certifications may be accepted with Government approval.
• Preferred/Work-center dependent: Microsoft Certified: Azure Administrator Associate or Microsoft Certified: Windows Server Hybrid Administrator Associate.

Security Clearance

• Must be able to obtain and maintain Public Trust suitability and all required system access (e.g., CAC-enabled accounts) to perform duties.

Other (Travel, Work Environment, DoD 8570 Requirements, Administrative Notes, etc.)

• Work is primarily on-site in San Antonio, TX; limited remote work may be allowed when authorized by the Government and mission requirements permit. Work may require after-hours, weekend, and/or on-call support as directed, including support during scheduled maintenance windows, high-impact incidents, vulnerability response actions, inspections, and surge periods.
• This position is aligned to applicable DoD Manual 8140.03 work role 451 (NIST: OM-SA-001); contractor personnel must meet DoD 8570.01-M baseline certification requirements and transition to DoD Manual 8140.03 work role requirements, including required training, knowledge, skills, abilities, and tasks, within Government-directed timelines.

Computer World Services is an affirmative action and equal employment opportunity employer. Current employees and/or qualified applicants will receive consideration for employment without regard to race, color, religion, sex, disability, age, sexual orientation, gender identity, national origin, disability, protected veteran status, genetic information or any other characteristic protected by local, state, or federal laws, rules, or regulations.

Computer World Services is committed to the full inclusion of all qualified individuals. As part of this commitment, Computer World Services will ensure that individuals with disabilities (IWD) are provided reasonable accommodations. If reasonable accommodation is needed to participate in the job application or interview process, to perform essential job functions, and/or to receive other benefits and privileges of employment, please contact Human Resources at [email protected] .

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.