Senior Microsoft Systems Engineer

Job Title: Senior MS Systems Engineer L3

Primary Location: Chicago IL, near O'Hare / Northwest Suburbs

Position Type: Full-Time Direct Hire or Contract to Hire

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• Bachelor's degree in Computer Science, Information Technology, or a related field (or equivalent work experience).

• Minimum of 5+ years of experience in systems administration, IT infrastructure management, and

• Experience supporting Microsoft technologies, including MS Windows Server, Microsoft System Center Configuration Manager (SCCM), MS Office 0365, MS Intune, Active Directory, and Azure AD (Entra ID).

• Proven experience supporting and managing on-premises infrastructure, including Active Directory, Windows Server, storage systems, and virtualization platforms (e.g., Hyper-V).

• Comfortable operating in on-premises IT environments, while possessing working knowledge/experience in cloud technologies like Azure AD and Intune.

• Strong expertise in Active Directory operations, including FSMO role management, Group Policy Objects (GPO), and Event Viewer/Event Log analysis for system diagnostics and auditing.

• Proven experience in designing, implementing, and maintaining server and storage infrastructures.

• Experience working with complex IT environments, including Active Directory configurations, Azure AD (Entra ID), VMs, and Hyper-V.

• Experience working with multiple operating systems, servers, and storage systems management.

• Experience managing system security, IAM, compliance, and endpoint security using tools like Okta, SentinelOne, or similar.

• Take ownership of on-premises system infrastructure, ensuring stability, performance, and security across physical and virtual environments.

• Administer and maintain server infrastructure, including installation, configuration, and monitoring.

• Perform proactive monitoring and diagnostics using Event Viewer and other native tools to ensure server health and system integrity.

• Perform regular system updates, backups, and ensure high availability of servers.

• Troubleshoot server-related issues and optimize server performance.

• Design, implement, and maintain the storage infrastructure ecosystem.

• Design, implement, and maintain data backup environment, including off-site disaster recovery.

• Responsible for applying patches, upgrading software, and making sure that data is secure.

• Maintain the fiber channel switches, cloud storage, and SAN arrangements.

• Design, implementation, and maintenance of on-premises Active Directory, including group policies, domains, and authentication. Familiarity with Azure Active Directory (Entra ID) in a hybrid capacity is beneficial.

• Responsibilities include managing domains, troubleshooting Active Directory authentication issues, performing FSMO role placement and maintenance, and using Event Logs for diagnostics and security auditing.

• Ensure that the Active Directory environment is secure, efficient, and scalable.

• Manage certificate authority servers, certificate lifecycle, and secure PKI infrastructure.

• Provide management and support of DNS systems.

• Develop strategies for disaster recovery and ensure compliance with regulations and policies.

• Design, implement, and maintain IT systems and infrastructure.

• Ensure the seamless integration of innovative technologies into existing systems.

• Assist in the recommendation of hardware and software solutions to meet organizational requirements.

• Develop, implement, and enforce security policies, procedures, and best practices.

• Assist during regular security audits and vulnerability assessments.

• Ensure compliance with industry regulations and standards.

• Monitor and address issues related to device endpoint security and configuration deployment.

• Collaborate with the service desk team to resolve escalated technical problems.

• Develop and maintain documentation for troubleshooting and system configurations.

• Provide technical support to end-users, addressing hardware and software issues.

• Perform incident root cause analysis and remediation of system outages.

• Participate in on-call rotation to provide off-hours support and maintenance.

• Work closely with cross-functional teams to understand business requirements.

• Collaborate with peers, system architects, and other stakeholders to develop effective IT solutions.

• Communicate technical information to non-technical stakeholders.

• Maintain infrastructure diagrams, configurations, and operating procedures.

• Stay informed about industry trends and emerging technologies.

• Propose and implement improvements to enhance system performance and efficiency.

• Participate in ongoing professional development to stay current with relevant certifications and skills.