Senior IT Systems Manager

Terrestris Global Solutions•Washington, DC

2d•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, we leverage technology to create better mission outcomes through better human performance. We form strong client and team relationships through transparency and strive to create an environment where our team can let their excellence shine through. By finding, developing, and incorporating new ideas, we provide memorable services. Rooted in the USMC values of honor, courage, and commitment, Terrestris seeks to deliver extraordinary value to the American people by helping the Government become more efficient and effective. The Senior IT Systems Manager provides leadership and hands-on support for cybersecurity and enterprise IT systems supporting the National Indian Gaming Commission mission. They oversee secure network operations, manage IT infrastructure and compliance, and deliver on-demand technical and cybersecurity services to protect systems, data, and continuity of operations at NIGC headquarters in Washington, D.C.

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.