Senior IT Systems Manager

Terrestris Global Solutions • Washington, DC

19h • Onsite

About The Position

Terrestris is seeking a Senior IT Systems Manager to provide on-demand Cybersecurity and IT services to support the National Indian Gaming Commission (NIGC) mission at the NIGC Headquarters in Washington, D.C. At Terrestris, the company leverages technology to create better mission outcomes through better human performance, forming strong client and team relationships through transparency. They strive to create an environment where their team can let their excellence shine through by finding, developing, and incorporating new ideas to provide memorable services. Rooted in USMC values, Terrestris aims to deliver extraordinary value to the American people by helping the Government become more efficient and effective. The Senior IT Systems Manager will provide leadership and hands-on support for cybersecurity and enterprise IT systems, overseeing secure network operations, managing IT infrastructure and compliance, and delivering on-demand technical and cybersecurity services to protect systems, data, and continuity of operations at NIGC headquarters.

Requirements

• Authorization to permanently work in the United States without sponsorship.
• A Bachelor’s degree and/or relevant certifications (AZ-800/801, AZ-104, MS-102, SC-300, Security+, Server+, CASP+, CAP, RHCSA, Cisco CCNA or CCNP Enterprise, etc.).
• Minimum 6 years of continuous experience in IT systems engineering or administration.
• Demonstrated experience applying NIST guidelines and FISMA requirements.
• Hands-on experience with Microsoft 365, Azure, Entra ID (identity, MFA, conditional access), and on-premises and cloud infrastructure (servers, storage, networking).
• Experience in systems engineering, administration, architecture evaluation, patch management, STIG implementation, and vulnerability mitigation.
• Disaster recovery planning and security compliance activities.
• Ability to recommend system improvements and remediation plans and support integration of IT systems and projects.
• Ability to perform with minimal supervision at a senior level.

Responsibilities

• Perform systems engineering and maintenance following standards.
• Apply NIST and FISMA principles to IT systems management.
• Implement and troubleshoot solutions across LAN, Azure, cloud, and wireless environments.
• Evaluate IT architecture and recommend improvements.
• Identify FISMA compliance gaps and propose remediation plans.
• Manage Microsoft 365 Entra ID (conditional access, MFA, auditing).
• Provide operational recommendations to system owners.
• Develop and implement STIG baselines and monitoring/alerting.
• Perform daily systems administration (on-prem and cloud).
• Execute security compliance tasks (EDR policies, SCUBA baselines).
• Install, configure, and maintain servers, storage, and networking equipment.
• Develop disaster recovery strategies.
• Implement patch management and secure data.
• Apply firmware and security updates.
• Maintain system configurations and mitigate vulnerabilities.
• Support projects and system integrations.
• Develop and maintain systems documentation and SOPs.

Benefits

• health benefits
• financial benefits
• retirement benefits
• paid leave
• professional development
• tuition assistance
• work-life programs
• award programs acknowledge employees for exceptional performance and superior demonstration of our service standards

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Number of Employees: 1-10 employees