Systems Administrator

Responsibilities System Installation and Configuration Install, configure, and maintain operating systems, servers, and system software in physical and virtual environments. Configure system hardware, operating systems, applications, and supporting infrastructure. Deploy system updates, patches, and upgrades in accordance with established procedures. Configure user accounts, permissions, and access controls. System Administration and Maintenance Monitor system performance, availability, and resource utilization. Perform routine system maintenance including backups, system checks, and preventive maintenance. Maintain system reliability and ensure minimal downtime. Troubleshoot and resolve system hardware, software, and operating system issues. Maintain system configuration documentation. Network and Infrastructure Support Support network‑connected systems including servers, storage systems, and infrastructure components. Assist with configuration and maintenance of network services such as DNS, DHCP, and directory services. Support system connectivity and ensure proper integration with network infrastructure. Assist with implementation and maintenance of virtual environments. Cybersecurity and Information Assurance Implement and maintain system security controls in accordance with DoD cybersecurity requirements. Apply system security patches, updates, and Security Technical Implementation Guides (STIGs). Support Risk Management Framework (RMF) requirements and security accreditation processes. Monitor systems for security events and unauthorized access. Maintain compliance with cybersecurity policies and procedures. Backup, Recovery, and Continuity Operations Perform system backups and verify backup integrity. Support system recovery and restoration operations. Assist in disaster recovery planning and continuity of operations activities. Ensure data integrity and availability. Test and Evaluation Support Support computer systems used in test instrumentation, data acquisition, and engineering environments. Configure and maintain systems supporting test operations. Assist in preparing systems for test events and ensuring operational readiness. Provide technical support during test activities and resolve system‑related issues. Documentation and Reporting Maintain system administration documentation, procedures, and configuration records. Document system changes, incidents, and corrective actions. Maintain system inventory and configuration management records. Provide status reports and technical input to program management. Support configuration management and V&V of all test support AIT and databases. Database Management Administers, tests, and implements computer databases, applying knowledge of database management systems. Coordinates changes to computer databases with programmers. May plan, coordinate, and implement security measures to safeguard computer databases. Technical Support and Coordination Provide technical support to users and technical staff. Coordinate with network engineers, cybersecurity personnel, and program staff. Assist in system planning, upgrades, and integration activities. Support system audits, inspections, and compliance reviews. Supervisory Responsibilities None. Qualifications Desired Knowledge, Skills & Abilities Technical Knowledge: Knowledge of system administration principles and practices. Knowledge of Windows Server, Linux, or UNIX operating systems. Knowledge of virtualization technologies such as VMware or Hyper‑V. Knowledge of system backup and recovery procedures. Knowledge of network services and infrastructure fundamentals. Knowledge of cybersecurity and information assurance principles. Technical Skills: Ability to install, configure, and maintain computer systems and servers. Ability to troubleshoot system hardware and software issues. Ability to apply system security configurations and updates. Ability to maintain system documentation and records. Ability to manage user accounts and access controls. Professional Skills: Strong analytical and problem‑solving skills. Ability to work independently and as part of a technical team. Strong organizational and documentation skills. Strong written and verbal communication skills. Preferred Knowledge and Certifications: CompTIA Security+, Network+, or equivalent certifications. Microsoft, Linux, or VMware certifications. DoD cybersecurity requirements including RMF and STIG compliance. Experience supporting test range instrumentation or engineering systems. Required Qualifications: Requires a Secret security clearance. One of the following: Bachelor’s degree in Computer Science, Information Technology, Information Systems, or related field; Associate’s degree in related field and two (2) additional years of relevant experience; Technical certification and four (4) additional years of relevant experience; Eight (8) years of relevant system administration experience in lieu of degree. Minimum of three (3) years of experience in system administration or IT infrastructure support. Experience administering Windows Server, Linux, or UNIX systems. Experience supporting networked computer systems and enterprise environments. Experience supporting DoD or Army systems preferred. Working Environment A fast paced multi‑tasking customer service oriented environment requiring a high degree of efficient and effective performance. Adaptability regarding schedule and task changes is necessary to accommodate changing priorities. Overtime may be required. EEO Statement Additionally, it is our policy to select, place, train and promote the most qualified individuals based upon relevant factors such as work quality, attitude and experience, so as to provide equal employment opportunity for all employees in compliance with applicable local, state and federal laws and without regard to non‑work related factors such as race, color, religion/creed, sex, national origin, age, disability, marital status, veteran status, pregnancy, sexual orientation, gender identity, citizenship, genetic information, or other protected status. Reasonable Accommodation It is Calista and Subsidiaries’ business philosophy and practice to provide reasonable accommodations, according to applicable state and federal laws, to all qualified individuals with physical or mental disabilities. #J-18808-Ljbffr