Senior Microsoft 365 Administrator

Position Overview

A1FED is seeking an experienced Senior Microsoft 365 (M365) Administrator to support the administration, configuration, optimization, and security of enterprise Microsoft 365 environments for a federal customer.

The ideal candidate will possess a strong understanding of Microsoft 365 architecture, design principles, and industry best practices, along with extensive hands-on experience administering Microsoft 365 enterprise environments. This role requires expertise in Microsoft 365 tenant management, identity and access management, endpoint administration, security integration, and PowerShell automation.

The successful candidate will be comfortable working independently in a remote environment, troubleshooting complex technical issues, and implementing secure, scalable, and efficient Microsoft 365 solutions that support business and mission requirements.

Key ResponsibilitiesMicrosoft 365 Administration

• Administer and maintain Microsoft 365 tenant configurations, subscriptions, licensing, service settings, and overall platform operations.

• Monitor tenant health and performance, ensuring optimal functionality, reliability, and security.

Microsoft Intune

• Manage device enrollment, endpoint configuration, compliance policies, application deployment, and mobile device management.

• Develop and maintain device management standards and security baselines.

Exchange Online

• Administer Exchange Online environments, including mailboxes, distribution groups, mail flow, permissions, retention policies, and troubleshooting activities.

• Support email security and compliance initiatives.

Microsoft Entra ID (Azure Active Directory)

• Manage identity and access services, including user and group administration, directory synchronization, and hybrid identity configurations.

• Implement and maintain authentication and authorization controls.

Single Sign-On (SSO) and Multi-Factor Authentication (MFA)

• Configure, maintain, integrate, and troubleshoot SSO and MFA solutions to support secure user access across enterprise systems.

• Ensure authentication solutions align with security and compliance requirements.

Role-Based Access Control (RBAC)

• Design, implement, and maintain RBAC models and permissions in accordance with least-privilege security principles.

• Conduct periodic access reviews and support audit activities.

PowerShell Automation

• Develop, enhance, maintain, and troubleshoot PowerShell scripts used to automate administrative processes and bulk operational tasks.

• Identify opportunities to improve efficiency through automation.

Architecture and Best Practices

• Apply Microsoft-recommended architecture, design principles, and industry best practices to improve reliability, scalability, security, and operational efficiency.

• Support platform modernization and continuous improvement initiatives.

Technical Troubleshooting

• Diagnose and resolve complex Microsoft 365 administration, configuration, integration, security, and performance issues.

• Collaborate with internal teams and stakeholders to identify root causes and implement corrective actions.

Documentation

• Develop and maintain technical documentation, standard operating procedures (SOPs), knowledge base articles, configuration guides, and operational processes.

• Ensure documentation remains current and supports operational continuity.

Required Qualifications

• Minimum of 6 years of hands-on Microsoft 365 administration experience within enterprise environments.

• Strong understanding of Microsoft 365 architecture, administration, and design best practices.

• Demonstrated experience managing Microsoft 365 tenant subscriptions, licensing, configurations, and administrative operations.

• Hands-on experience administering Microsoft Intune, including device enrollment, configuration management, compliance policies, and endpoint security.

• Extensive experience administering Microsoft Exchange Online.

• Experience with Microsoft Entra ID (Azure Active Directory), including identity management, directory synchronization, and hybrid identity solutions.

• Experience implementing, configuring, and troubleshooting Single Sign-On (SSO) and Multi-Factor Authentication (MFA) solutions.

• Experience designing and maintaining Role-Based Access Control (RBAC) models and permissions.

• Strong PowerShell scripting skills, including creating, modifying, automating, and troubleshooting scripts.

• Excellent analytical, problem-solving, and technical troubleshooting abilities.

• Strong verbal and written communication skills.

• Ability to work independently and collaboratively within a fully remote environment.

• Must possess a Federal Public Trust clearance or be eligible to obtain one.

• Must reside and perform work within the United States.

Preferred Qualifications

• Experience working within an ITIL-based IT Service Management (ITSM) environment.

• Microsoft certifications relevant to Microsoft 365 administration, security, identity, messaging, or endpoint management (e.g., MS-102, SC-300, MD-102).

• Experience administering SharePoint Online, including site administration, permissions management, and platform configuration.

• Experience with Microsoft Purview, including records management, retention policies, data governance, compliance, and information lifecycle management.

• Experience with cloud infrastructure and administration platforms such as Microsoft Azure and AWS.

• Previous experience supporting federal government customers, highly regulated industries, or compliance-driven environments.

Work Environment

• 100% Remote: Work may be performed remotely from anywhere within the United States.

• Full-time position supporting a federal government customer.

• Collaborative, mission-focused technical environment dedicated to delivering secure, reliable, and efficient enterprise IT solutions.

Clearance Requirement

• Federal Public Trust clearance required or the ability to obtain and maintain one.

Employment Eligibility

• Must be authorized to work in the United States and perform all work within the United States.

Benefits

• Competitive salary and comprehensive benefits package, including medical, dental, vision, paid time off, and retirement benefits.

Equal Opportunity Employer

A1FED is an Equal Opportunity Employer and values diversity in the workplace. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability, veteran status, or any other protected characteristic.