Microsoft 365 Engineer II

Applied Information Sciences•Reston, VA

About The Position

Why AIS? When you join AIS, you’re joining a mission-driven team that’s passionate about making a difference. You’ll work on projects that matter, alongside industry-leading experts, in an environment that fosters innovation, driving client success, and empowering our team to make a lasting impact. As an employee-owned company, we value collaboration, inclusivity, continuous growth, and shared success. Employee Ownership : Your contributions directly impact the company’s success, and you share in its achievements. Continuous Learning : Access to resources, training, and mentorship to support your professional growth. Inclusive Culture : A workplace where diversity is celebrated, and everyone’s voice is valued. Mission-Driven Work : Engage in projects that make a meaningful difference for our clients and communities. What are we looking for? At AIS, we're looking for more than just skills - we're looking for driven individuals who are passionate about making a difference, eager to grow, and aligned with our core principles. Working@AIS At AIS, we are dedicated to providing our employees with diverse opportunities to grow their careers while supporting a variety of impactful projects. For this position, we are seeking a talented individual to join AIS as a Senior Infrastructure Engineer. Core Knowledge & Skills: Designs complex network and hybrid‑cloud solutions; implements security controls, DR/BCP, and automated IaC with deployment pipelines; performs advanced performance tuning. Work & Complexity: Solves complex issues, designs and delivers new infrastructure solutions, performs capacity planning, and leads advanced automation initiatives. Quality & Independence: Drives root‑cause analysis, enforces best practices and QA on changes, optimizes for reliability and user experience; operates with high autonomy. Teamwork & Communication: Leads cross‑functional efforts, mentors juniors, facilitates knowledge transfer, and aligns stakeholders with technical plans. Consulting & Engagement: Provides strategic input on infrastructure initiatives, recommends advanced technologies, and manages vendor relationships. As your initial project assignment, you will support the unique needs of our client as a Microsoft 365 Engineer II. Project Summary AIS is seeking a mid-level Microsoft 365 Engineer with hands-on experience supporting and implementing Microsoft 365 messaging, identity, and migration solutions. This role is primarily focused on Exchange Online, Exchange hybrid environments, identity integration, and migration execution. The Microsoft 365 Engineer will support both project-based implementation efforts and ongoing operational activities, working closely with architects, project managers, security teams, and customer stakeholders.

Requirements

3–6 years of experience administering and engineering Microsoft 365 and Exchange environments.
Hands-on experience with Exchange Online administration and Exchange hybrid deployments.
Working knowledge of Microsoft Entra ID, Azure AD Connect / Entra Connect, identity synchronization, and hybrid identity concepts.
Experience supporting one or more enterprise messaging migration efforts involving Exchange Online.
Familiarity with mail routing, SMTP, DNS records, message hygiene concepts, and hybrid mail flow troubleshooting.
Experience managing recipients, mailboxes, distribution groups, shared mailboxes, and Exchange policies.
Proficiency with PowerShell for Microsoft 365, Exchange Online, and administrative automation.

Nice To Haves

Experience with Exchange Server administration in support of hybrid coexistence.
Experience with Microsoft 365 migration tools and third-party migration platforms.
Familiarity with Microsoft Purview, retention policies, litigation hold, and compliance considerations related to mailbox migrations.
Understanding of conditional access, modern authentication, and legacy authentication dependencies.
Microsoft certifications such as Microsoft 365 Administrator, Messaging, Identity, or related Azure certifications.

Responsibilities

Engineer, configure, and support Exchange Online environments within Microsoft 365 tenants.
Assist with design, implementation, and administration of Exchange Hybrid configurations between on-premises Exchange and Exchange Online.
Configure and maintain mail flow components including connectors, accepted domains, remote domains, transport rules, and mail routing policies.
Support identity integration across Microsoft 365 and hybrid environments, including Entra ID synchronization, federation concepts, authentication flows, and directory object management.
Execute mailbox, archive, distribution group, shared mailbox, and resource mailbox migration activities using Microsoft-native and approved third-party tools.
Perform tenant onboarding, domain configuration, DNS cutover support, and migration readiness assessments.
Troubleshoot issues related to hybrid mail flow, free/busy, autodiscover, authentication, directory synchronization, and mailbox provisioning.
Support migration planning and execution for Exchange mailbox moves, tenant consolidations, cutover migrations, staged migrations, and hybrid migrations.
Develop migration runbooks, standard operating procedures, validation plans, rollback procedures, and technical documentation.
Support implementation and troubleshooting of Microsoft 365 security features related to messaging and identity, such as MFA, conditional access dependencies, and basic email protection controls.

Benefits

Employee Ownership : Your contributions directly impact the company’s success, and you share in its achievements.
Continuous Learning : Access to resources, training, and mentorship to support your professional growth.
Inclusive Culture : A workplace where diversity is celebrated, and everyone’s voice is valued.

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