Maintain and secure the IT infrastructure supporting a collateral storage facility operating on a closed, isolated network. Responsibilities include administration of Windows and Linux systems, configuration of secure network services, management of backup and recovery processes, enforcement of access control, and implementation of security hardening measures.
Essential Duties- Administer and maintain Windows and Linux servers in a closed network environment.
- Manage user accounts, access permissions, and authentication controls.
- Perform patching, system hardening, and secure configuration of operating systems and applications.
- Configure and monitor firewalls, DNS, DHCP, and connectivity services.
- Implement and test backup schedules and disaster recovery processes.
- Maintain documentation, configuration baselines, and inventories.
- Monitor logs and alerts for anomalies and troubleshoot issues.
- Support hardware installation and maintenance within the facility.
Supervisory ResponsibilitiesNone. May mentor junior staff as required.
Desired Knowledge, Skills & Abilities- Proficiency with Linux and Windows administration.
- Knowledge of networking fundamentals (DNS, DHCP, routing, firewalls).
- Understanding of secure configuration standards and vulnerability remediation.
- Familiarity with backup systems and disaster recovery.
- Ability to script using PowerShell or Bash.
- Strong analytical and documentation skills.
Required Qualifications- Bachelor's degree in IT, CS, or related field; or equivalent experience.
- 3 years of system administration experience.
- Experience with Linux and Windows server environments.
- Active DoW Secret clearance required.
- Certifications such as Security+, Network+, RHCSA, or CCNA preferred.
Working EnvironmentIndoor, secure, access-controlled facility. No shift or on-call work required.
PREFERENCE STATEMENTPreference will be given to Calista shareholders and their descendants and to spouses of Calista shareholders, and to shareholders of other corporations created pursuant to the Alaska Native Claims Settlement Act, in accordance with Title 43 U.S. Code 1626(g).
The statements contained in this job description are intended to describe the general content and requirements for performance of this job. It is not intended to be an exhaustive list of all job duties, responsibilities, and requirements.
This job description is not an employment agreement or contract. Management has the exclusive right to alter the scope of work within the framework of this job description at any time without prior notice.
