Senior Infrastructure Engineer - Messaging

Role Overview

• This senior role leads the day-to-day administration and engineering of our Exchange Servers and Exchange Online environment.
• The ideal candidate pairs strong attention to detail with deep email infrastructure knowledge and advanced PowerShell and Microsoft Graph automation skills.
• The engineer plays a critical role in designing, implementing, and supporting a reliable, secure, and scalable Microsoft 365 messaging environment with a focus on Exchange Online, ensuring availability, security, compliance, and performance in a hybrid, multi-office law firm environment.
• The role also serves as a technical lead for Microsoft 365 messaging services, including Microsoft Purview, Mimecast (or similar email security platforms), Microsoft Teams, centralized email signature tools such as Exclaimer, and Microsoft 365 tenant settings that affect mail flow, hygiene, retention, and compliance, in close partnership with Endpoint Management and Identity teams for Intune, Conditional Access, and related identity controls.

Requirements

• 7+ years of IT infrastructure experience, with at least 5 years focused on Exchange administration and Microsoft 365 messaging in a mid
• to large-sized enterprise.
• Deep experience administering Exchange Online and Exchange Server in hybrid configurations, including cross-version upgrades and complex mail flow.
• Proven experience leading Exchange migrations from on-premises Exchange (including Exchange Server Subscription Edition) to Exchange Online; exposure to tenant-to-tenant or multi-organization Microsoft 365 migrations is strongly preferred.
• Advanced PowerShell scripting skills and practical experience using Microsoft Graph to automate and manage Exchange Online and related Microsoft 365 messaging tasks and workflows.
• Experience administering and supporting Mimecast (or a similar email security platform) and managing email hygiene controls such as DKIM, DMARC, and SPF.
• Knowledge of Microsoft 365 integration and migration tools and methods, such as Azure AD Connect and hybrid Exchange configurations.
• Demonstrated ability to troubleshoot complex messaging and client issues end to end, including mail flow, connectivity, and client performance, and to drive durable fixes.
• Experience partnering with Endpoint Management and Identity teams on Intune, Conditional Access, and MDM/MAM controls for secure, low-friction access to messaging.
• Experience configuring and supporting Microsoft Purview (or a similar platform) for cloud-based security, compliance, retention, and DLP.
• Comprehensive knowledge of Active Directory and identity management principles (Okta, AD, Entra ID) in the context of messaging and Microsoft 365 access.
• Experience creating and maintaining documentation, standards, and runbooks, and mentoring junior engineers or support staff.
• Experience with centralized email signature management platforms (such as Exclaimer) or similar products for firmwide signatures and branding.
• Experience working in a law firm or other professional services environment where email and calendaring are mission critical.

Tech Stack

• Azure
• Cloud

Benefits

• Paid time off
• Sick time off
• Referral program
• Medical insurance and benefits
• Dental insurance
• Vision insurance
• Life insurance
• AD&D insurance
• ID Theft insurance
• Long-term disability benefits
• Short-term disability benefits
• Parking/Transit reimbursement (varies depending on location)
• 401(k) benefits
• Employee assistance benefits