Sr. Systems Engineer (M365)

Job Title: Sr. Systems Engineer (M365)
Location: Portsmouth, NH (Hybrid — onsite 2-3 days/week; only local candidates will be considered)
Employment Type: Full-time, Permanent

Company Overview
Our client is an organization with critical infrastructure supporting business operations 24/7/365, currently advancing major cloud migration and infrastructure modernization initiatives.

Project Description
We are seeking a Senior Systems Engineer, with a specific focus on M365, to play a key role in managing and advancing our client's virtual, cloud, and data center infrastructure. This position is responsible for maintaining critical systems that support business operations 24/7/365 while helping lead cloud migration efforts and infrastructure modernization initiatives. This role has a strong focus on Entra/M365 and requires experience in conditional access, CIS/SCuBA compliance, Intune, and hybrid join. This position includes a rotating on-call shift (1 week every 5 weeks).

Key Responsibilities

• Manage and advance virtual, cloud, and data center infrastructure supporting 24/7/365 operations
• Lead and support cloud migration efforts and infrastructure modernization initiatives
• Administer Entra/M365 environments, including conditional access, CIS/SCuBA compliance, Intune, and hybrid join
• Administer VMware environments, blade systems, and SAN technologies
• Manage Microsoft Windows Server administration and patch management
• Support Microsoft 365, Office 365, Azure, and AWS environments
• Manage virtual desktop infrastructure and enterprise monitoring platforms
• Support data center operations, infrastructure management, and disaster recovery practices
• Follow configuration management and change control processes
• Participate in rotating on-call shift (1 week every 5 weeks)

Mandatory Skills

• 7+ years of experience supporting enterprise infrastructure in a 24x7 environment
• Strong experience with Entra/M365, including conditional access, CIS/SCuBA compliance, Intune, and hybrid join
• Extensive experience administering VMware environments, blade systems, and SAN technologies
• Strong knowledge of Microsoft Windows Server administration and patch management
• Experience supporting Microsoft 365, Office 365, Azure, and AWS environments
• Experience managing virtual desktop infrastructure and enterprise monitoring platforms
• Knowledge of data center operations, infrastructure management, and disaster recovery practices
• Strong troubleshooting skills across server, storage, virtualization, and cloud technologies
• Proficiency with scripting and automation tools such as PowerShell, Bash, or Python