Senior Systems Administrator

Role Summary The Senior Systems Administrator owns the reliability, security, and lifecycle of on-premises and cloud systems that support academic and administrative operations. This role focuses on identity, servers, endpoints, backups, security controls, and SaaS integrations. Network architecture and infrastructure responsibilities are handled by external specialists.

Reporting & Operating Model Reports to the Director of ITWorks daily with external network and security consultants

Primary point of contact for MSP and systems vendors

Expected to perform maintenance and upgrades outside business hours when required

Primary Responsibilities Identity & Access Administer Microsoft Entra  (Azure AD), hybrid identity, and Conditional Access Manage SSO integrations (SAML / OIDC)
Support MFA platforms (e.g., Duo)
Maintain RBAC, group strategy, and lifecycle automation

Server & Platform Administration Administer Windows Server and Linux systems (on-prem and cloud)
Manage virtualization platforms (VMware or equivalent)
Maintain directory, DNS, and DHCP services

Perform patching, upgrades, and lifecycle planning

Endpoint & Device Management Support Jamf and Intune device platforms

Integrate device identity with authentication systems

Maintain macOS and Windows configuration baselines and compliance

Backup, DR, and Reliability Administer backup platforms (Veeam, Druva, or equivalent)
Test restores and document recovery procedures

Maintain disaster recovery runbooks and system dependencies

Security Operations (Non-Network)
Apply OS-level hardening and patching

Respond to endpoint and server security incidents

Support audits, logging, and compliance controls

Coordinate with security vendors and consultants

SaaS & Application Support Own backend administration for Google Workspace, Microsoft 365, Blackbaud, and core platforms

Maintain service integrations and provisioning flows

Troubleshoot authentication, sync, and access issues

Documentation & Process Maintain system documentation and diagrams

Create operational runbooks and escalation procedures

Support change management and configuration tracking

Required Qualifications 5+ years as a Systems Administrator in mixed Windows/macOS environments

Strong Windows Server and identity experience

Hands-on Entra  / Azure AD experience

Virtualization and backup platform experience

Proven ability to own systems end-to-end Strongly

Preferred Experience in K-12 or higher education

Intune administration

Hybrid identity migrations

SaaS-heavy environments with limited on-prem footprint

Ability to work independently without a large internal IT team Familiarity with advanced networking concepts for coordination and troubleshooting

Compensation $113,022 - $116,978

Application Information Please  to complete an application and upload your resume, cover letter, and the names and contact information for three to five references, including two present or past supervisors.

Equal Opportunity Act:
Thayer Academy is an equal opportunity employer. The Academy complies with and adheres to all state and federal anti-discrimination laws with respect to its employment practices. Thayer Academy does not discriminate against any employee or applicant for employment on the basis of race, color, religion, gender, sexual orientation, gender identity and expression, national origin or ancestry, age, or disability, or any other category protected under state or federal law.

This policy extends to recruiting, hiring, compensation, benefits, assignment, working conditions, promotions, transfers, termination, re-employment, education, tuition assistance, employee treatment, and all other terms, conditions, and privileges of employment. All employment-related decisions are made on a nondiscriminatory basis so as to further the principle of equal employment opportunity.

Americans with Disabilities Act:
Thayer Academy complies with all aspects of the Americans with Disabilities Act (ADA) and state disability laws. This means that we will not discriminate against qualified individuals with a disability in any phase of the employment relationship including application for employment, hiring, promotions and/or advancement opportunities, termination, compensation, training, and any other conditions or privileges of employment.
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