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.
- Job DescriptionProject Summary
AIS is seeking a Senior Microsoft 365 Engineer with deep technical expertise in Exchange Online, Exchange Hybrid, identity integration, and enterprise migration delivery. This role is responsible for leading the engineering, implementation, and operational support of Microsoft 365 messaging and hybrid identity solutions in complex enterprise environments, while mentoring junior engineers and partnering closely with architects, security teams, project managers, and customer stakeholders.
Key ResponsibilitiesLead implementation, administration, and advanced support for Exchange Online in enterprise Microsoft 365 environments.
Engineer and maintain Exchange Hybrid configurations, including coexistence, mail flow, organization relationships, free/busy, autodiscover, and mailbox move capabilities.
Design, configure, and troubleshoot complex mail flow scenarios involving connectors, accepted domains, transport rules, relay configurations, journaling dependencies, and secure message routing.
Lead identity-dependent messaging integrations across hybrid environments, including Entra ID synchronization, authentication dependencies, directory object consistency, and access control alignment.
Execute and oversee complex migration activities including Exchange Online onboarding, hybrid mailbox migrations, tenant-to-tenant migrations, archive migrations, and messaging coexistence transitions.
Troubleshoot escalated issues related to Exchange Hybrid, hybrid authentication, mail routing, mailbox provisioning, directory synchronization, client connectivity, and service interoperability.
Develop engineering standards, migration runbooks, validation procedures, rollback plans, and operational documentation to support repeatable delivery.
Provide technical leadership during discovery workshops, design sessions, cutover events, and post-migration stabilization efforts.
Support implementation of security-related controls affecting Exchange and identity, including modern authentication, MFA dependencies, conditional access impacts, and legacy protocol remediation.
Participate in change planning, risk identification, issue management, and root cause analysis for messaging and identity services.
6–10+ years of experience engineering and administering Microsoft messaging and identity environments.
Deep hands-on experience with Exchange Online and Exchange Hybrid in enterprise environments.
Strong understanding of Exchange Server as it relates to hybrid coexistence, recipient management, mail routing, and legacy integration dependencies.
Strong experience with Microsoft Entra ID, Entra Connect / Azure AD Connect, hybrid identity, directory synchronization, and authentication troubleshooting.
Proven experience leading or executing large-scale Exchange migration efforts, including hybrid mailbox moves, tenant transitions, or staged enterprise migrations.
Advanced knowledge of SMTP, DNS, MX, SPF, DKIM, DMARC, autodiscover, and enterprise mail flow design and troubleshooting.
Strong PowerShell skills for Exchange Online, Microsoft 365, and automation of administrative or migration tasks.
Experience developing technical documentation, migration plans, cutover checklists, and post-deployment support artifacts.
Experience with tenant-to-tenant migration tools or third-party migration platforms.
Experience supporting Microsoft 365 projects in regulated, high-security, or large enterprise environments.
Familiarity with Microsoft Purview compliance features related to mailbox retention, eDiscovery, archive strategies, and data governance.
Knowledge of conditional access, identity protection concepts, and secure external access considerations that impact messaging and authentication.
Experience integrating Exchange and identity changes into broader Microsoft 365 transformation efforts.
Exposure to Teams, SharePoint Online, or other adjacent Microsoft 365 workloads.
Relevant Microsoft certifications in Microsoft 365, Exchange, Azure, or Identity and Access Management.
Applied Information Sciences does not discriminate on the basis of race, national origin, religion, color, gender, sexual orientation, age, disability, protected veteran status, or any other basis. Employment decisions are based solely on qualifications, merit, and business needs.
Skills Required
- 6-10+ years of experience engineering and administering Microsoft messaging and identity environments.
- Deep hands-on experience with Exchange Online and Exchange Hybrid in enterprise environments.
- Strong understanding of Exchange Server for hybrid coexistence, recipient management, and mail routing.
- Strong experience with Microsoft Entra ID, Entra Connect / Azure AD Connect, directory synchronization, and authentication troubleshooting.
- Proven experience leading or executing large-scale Exchange migration efforts (hybrid mailbox moves, tenant transitions, staged migrations).
- Advanced knowledge of SMTP, DNS, MX, SPF, DKIM, DMARC, autodiscover, and enterprise mail flow design and troubleshooting.
- Strong PowerShell skills for Exchange Online, Microsoft 365, and automation of administrative or migration tasks.
- Experience developing technical documentation, migration plans, cutover checklists, and post-deployment support artifacts.
AIS (Applied Information Sciences) Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about AIS (Applied Information Sciences) and has not been reviewed or approved by AIS (Applied Information Sciences).
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Equity Value & Accessibility — Employee ownership via an ESOP is emphasized and contributes meaningful long‑term value to total rewards. Equity participation is positioned as a core part of the package.
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Retirement Support — A 401(k) with employer match is consistently described alongside the ESOP. Together these programs are framed as key pillars of financial benefits.
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Healthcare Strength — Multiple medical plan choices, plus dental and vision, are highlighted as part of a comprehensive offering. Health coverage is paired with PTO and paid holidays to round out the package.
AIS (Applied Information Sciences) Insights
What We Do
AIS (Applied Information Sciences) provides software and systems engineering services to government agencies and businesses across the United States. We specialize in cloud services, DevOps, custom application development, and IT services. Our areas of expertise include custom application development, Microsoft Azure, Amazon Web Services (AWS), Office 365, SharePoint, Dynamics 365, User Experience (UX), business intelligence/advanced analytics and IoT, and Managed Services. Our customers include a broad range of organizations, from start-ups to Fortune 100 companies, and include state and local governments as well as defense and national security agencies. Our analysis-driven approach to solving business problems—combined with our commitment to deadlines and budgets—results in successful projects and long-term relationships with our clients. We're a top-tier cloud partner for Microsoft, Amazon and Equinix with proven capabilities and a track record of success. AIS is a Microsoft gold partner with six competencies and a Microsoft National Solution Provider (NSP). From over 750,000 Microsoft partners, there are less than 50 partners that have been selected for inclusion in the NSP organization. Microsoft chooses partners for this program that have proven capabilities to scale to the needs of large enterprises across the United States. Founded in 1982, AIS is a growing and privately held company headquartered in Reston, Virginia, with offices in Maryland, North Carolina, Ohio, Texas, Indiana, and India. Check out our opportunities at careers.ais.com.
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