Senior System Administrator

General information

Description & Requirements

ManTech seeks a motivated, career and customer-oriented Senior System Administrator to join our team in Virginia Beach, VA. This position is onsite.

In this role, the Senior Systems Administrator will support a secure Windows-based Information System and will assist and support the installation, operation, and maintenance of all current and future Information Systems within ManTech.

Responsibilities include, but are not limited to:

• Implement and maintain firewalls, VPNs, IDS/IPS, and monitor systems to detect intrusions and enforce IT security protocols

• Provide expert technical support, resolving complex issues and mentoring junior administrators

• Plan and execute system upgrades, manage backups, and ensure infrastructure resilience

• Monitor system performance and capacity, analyze trends, and recommend enhancements

• Develop and maintain clear technical documentation, ensuring alignment with industry standards

• Support project planning and implementation while ensuring compliance with security regulations and best practices

Minimum Qualifications:

• Bachelor's degree in Computer Science, Information Technology or related field

• 5+ years of professional experience working with computer systems, specifically Windows 10 or 11, software applications, network administration, and troubleshooting

• ACAS vulnerability management experience, i.e., using Assured Compliance Assessment Solution (ACAS) for vulnerability scanning and remediation, ensuring compliance with DoD security standards

• Advanced Hardware Optimization experience, specifically diagnosing and optimizing system hardware (e.g., CPU, memory, storage), beyond basic BIOS/UEFI and laptop hardware knowledge

Preferred Qualifications:

• Advanced expertise in developing PowerShell scripts to automate system maintenance tasks (e.g., log analysis, patch deployment), extending beyond basic scripting

• Basic knowledge of implementing Risk Management Framework (RMF) processes, including security control assessments and authorization package development, complementing STIG and patching skills

• Foundational proficiency in configuring and troubleshooting virtual environments (e.g., VMware vSphere), enhancing basic virtual machine setup and operation

• Robust capability in managing Linux-based tools or applications within Windows environments, enhancing system interoperability and complementing partitioning and logical volume management expertise

Clearance Requirements:

• Must have a current and active Secret Security Clearance

Physical Requirements:

• The person in this position must be able to remain in a stationary position 50% of the time.

• Occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, via email, phone, and or virtual communication.