We are looking for a Microsoft Architect & System Administrator to be part of a Digital Modernization team and be responsible for performing advanced software engineering, systems integration, and systems administration functions across enterprise Microsoft environments. The position will design, develop, implement, and support software-intensive infrastructure systems while applying established principles, standards, and tools throughout the full software development and system lifecycle.The position works independently on day-to-day objectives with significant impact to operational results and project deliverables and is responsible for entire projects or major processes within a technical area. The role also provides technical leadership by coaching and reviewing the work of lower-level staff and serving as an escalation point for complex issues.Key Responsibilities:· Provide enterprise-level architecture, engineering, and operational support for Microsoft Windows-based systems across on-prem and cloud environments supporting DOT’s Common Operating Environment (COE).· Perform software and systems requirements analysis, hardware compatibility assessments, and solution design for infrastructure modernization initiatives.· Design, implement, and support Active Directory, Microsoft Entra ID, SCCM/MECM, Intune, and Deployment Services across enterprise environments.· Support provisioning, patching, vulnerability remediation, and lifecycle management of Windows Server environments.· Lead troubleshooting efforts for complex system, application, and production issues; serve as an escalation point across multiple technical teams.· Develop and implement high-availability and disaster recovery (HA/DR) solutions and support server migrations from on‑premises to cloud environments (AWS GovCloud, AWS, Azure, Oracle, and Google Cloud).· Apply scripting and automation using PowerShell, Microsoft Graph, and VBScript to improve operational efficiency and reduce manual effort.· Support identity and access management initiatives, including role-based access controls, certificate-based authentication, MFA, and conditional access policies.· Conduct root cause analysis and problem management for enterprise Windows systems and tools.· Create and maintain technical documentation covering system architecture, configurations, operational procedures, and troubleshooting.