Systems Administrator

Sierra Lobo, offers customers a full range of professional and technical capabilities, including Test and Evaluation, Systems Engineering, and Advanced Technologies. We also develop products and processes related to Cryogenic Fluid and Thermal Management Systems, Densified Propellant Management Systems, and Prototype Extreme Pressure and Temperature Systems. Our customers include the Department of Defense (DoD), the U.S. Air Force, U.S. Navy, U.S. Army, Missile Defense Agency (MDA), and the National Aeronautics and Space Administration (NASA).

Position Summary:

The Systems Administrator is responsible for the planning, implementation, security, and maintenance of the organization's IT infrastructure. This role serves as a technical expert and mentor within the IM team, ensuring the reliability, scalability, and performance of enterprise systems while contributing to strategic initiatives and technology improvements.

Key Responsibilities:

Design, implement, and manage enterprise systems including servers, storage, virtualization platforms (e.g., VMware, Hyper-V), cloud environments (e.g., AWS, Azure), and email systems (e.g., Exchange).
• Lead infrastructure projects including system upgrades, migrations, and integrations.
• Optimize system performance, monitor capacity, and proactively address potential issues and bottlenecks.
• Ensure high availability, business continuity, and disaster recovery planning and execution.
• Harden systems against security threats; apply updates, patches, and configuration best practices.
• Collaborate with security and compliance teams to support audits, access controls, and policy enforcement.
• Develop and maintain detailed documentation, including network diagrams, system configurations, and SOPs.
• Automate repetitive tasks using scripts or infrastructure-as-code practices (e.g., PowerShell, Bash, Ansible).
• Provide technical support and guidance to IM staff.
• Evaluate and recommend new technologies, tools, and standards to improve infrastructure reliability and efficiency.

Qualifications:

Required:

• Bachelor's degree in Computer Science, Information Technology, or a related field; or equivalent experience.
• 5+ years of progressively responsible experience in systems administration or infrastructure engineering.
• Deep knowledge of Windows Server and Linux environments, Active Directory, DNS, DHCP, and Group Policy.
• Deep knowledge of Exchange systems.
• Strong experience with virtualization (e.g., VMware vSphere/ESXi, Hyper-V), storage systems, and backup solutions.
• Hands-on expertise with cloud platforms (AWS, Azure), including hybrid environments.
• Familiarity with networking, firewalls, VPNs, and security hardening.
• Proficiency in scripting for automation (e.g., PowerShell, Bash, Python).

Preferred:

• Certifications such as Microsoft Certified: Azure Administrator Associate, AWS SysOps Administrator, VCP, or CompTIA Advanced Security Practitioner (CASP+).
• Experience with infrastructure automation and DevOps tools (e.g., Terraform, Ansible, Jenkins).
• Knowledge of compliance frameworks (e.g., NIST, HIPAA, SOC 2, ISO 27001).

Competencies:

• Strategic and technical leadership
• Proactive problem-solving and decision-making
• High attention to detail and documentation discipline
• Excellent communication and mentoring skills
• Strong project and time management abilities

Working Conditions:

• Primarily office based.
• May require after-hours support for critical issues, maintenance windows, on-call rotation, or travel to data center or contract locations.
• Ability to lift and install hardware when needed.