Polsinelli · 1 day ago
Senior Infrastructure Engineer - Messaging
Birmingham, AL
Full-time
Hybrid
Senior Level
$140K/yr - $160K/yr
7+ years expPolsinelli is a national law firm headquartered in Kansas City, MO, seeking a Senior Infrastructure Engineer. This role is responsible for leading the administration and engineering of the firm's Exchange Servers and Exchange Online environment, ensuring a reliable and secure Microsoft 365 messaging infrastructure.
ConsultingInsuranceLegalProfessional Services
Responsibilities
Serve as the technical lead and key owner for the firm’s Exchange Online, Exchange Server, and related Microsoft 365 messaging services, ensuring availability, security, compliance, and performance in a hybrid law firm environment
Help drive the maintenance, design, development, support, and security of the firm’s messaging services, treating email and calendaring as critical business applications
Provide 24x7 support for critical production messaging systems as part of an on-call rotation
Lead or play a key role in migration efforts from Exchange Server Subscription Edition to Exchange Online, and contribute to planning for future tenant-to-tenant Exchange Online/Microsoft 365 migrations to support acquisitions and integrations
Manage and monitor Microsoft 365 tenant components that affect messaging, including mail flow, message hygiene, retention, compliance, DKIM, DMARC, SPF, and Mimecast (or similar products)
Collaborate with Endpoint Management and Identity teams on Intune, Conditional Access, MDM/MAM, and identity controls (Entra ID, Active Directory, Okta) to ensure secure, low-friction access to messaging services
Provide advanced administration, technical support, and troubleshooting for complex issues involving Microsoft Exchange Online and Exchange Server in a hybrid environment, acting as a Tier 3 escalation point
Configure and support Microsoft Purview features related to messaging and collaboration, including data loss prevention, retention, and eDiscovery, in partnership with Security and Compliance teams
Design, implement, and maintain automation and reporting for messaging operations using PowerShell and Microsoft Graph to reduce manual work and improve consistency at scale
Develop and maintain documentation, runbooks, knowledge articles, and monitoring/alerting for messaging and collaboration services
Implement capacity planning and proactive remediation to address issues before they impact users, and provide input to IT leadership on technology improvements, standards, and roadmap for messaging and Microsoft 365 collaboration
Partner with Help Desk, Deskside, and other support teams to resolve escalated messaging tickets, mentor staff on common patterns, drive root cause analysis, and reduce recurring issues
Experience with centralized email signature management platforms (such as Exclaimer) or similar products for firmwide email signatures and branding is a strong plus
Other duties as assigned
Qualification
Required
Serve as the technical lead and key owner for the firm's Exchange Online, Exchange Server, and related Microsoft 365 messaging services, ensuring availability, security, compliance, and performance in a hybrid law firm environment
Help drive the maintenance, design, development, support, and security of the firm's messaging services, treating email and calendaring as critical business applications
Provide 24x7 support for critical production messaging systems as part of an on-call rotation
Lead or play a key role in migration efforts from Exchange Server Subscription Edition to Exchange Online, and contribute to planning for future tenant-to-tenant Exchange Online/Microsoft 365 migrations to support acquisitions and integrations
Manage and monitor Microsoft 365 tenant components that affect messaging, including mail flow, message hygiene, retention, compliance, DKIM, DMARC, SPF, and Mimecast (or similar products)
Collaborate with Endpoint Management and Identity teams on Intune, Conditional Access, MDM/MAM, and identity controls (Entra ID, Active Directory, Okta) to ensure secure, low-friction access to messaging services
Provide advanced administration, technical support, and troubleshooting for complex issues involving Microsoft Exchange Online and Exchange Server in a hybrid environment, acting as a Tier 3 escalation point
Configure and support Microsoft Purview features related to messaging and collaboration, including data loss prevention, retention, and eDiscovery, in partnership with Security and Compliance teams
Design, implement, and maintain automation and reporting for messaging operations using PowerShell and Microsoft Graph to reduce manual work and improve consistency at scale
Develop and maintain documentation, runbooks, knowledge articles, and monitoring/alerting for messaging and collaboration services
Implement capacity planning and proactive remediation to address issues before they impact users, and provide input to IT leadership on technology improvements, standards, and roadmap for messaging and Microsoft 365 collaboration
Partner with Help Desk, Deskside, and other support teams to resolve escalated messaging tickets, mentor staff on common patterns, drive root cause analysis, and reduce recurring issues
Excellent communication, collaboration, and customer service skills, with the ability to explain technical issues in clear, business-friendly language
Strong time management and organization; able to lead multiple concurrent projects and operational priorities
Motivated by curiosity, ingenuity, and a desire to learn and grow in a constantly evolving Microsoft 365 environment
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
Preferred
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
Benefits
Paid time off
Sick time off
A 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
Company
Polsinelli
Polsinelli is an Am Law 100 firm with more than 1,000 attorneys in 22 offices.
1001-5000 employees
H1B Sponsorship
Polsinelli has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
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Trends of Total Sponsorships
2025 (3)
2023 (6)
2021 (1)
2020 (4)
Funding
Current Stage
Late StageLeadership Team
Chase Simmons
Chairman & CEO
Scott Fletcher
Chief Operating Officer and Chief Financial Officer
Recent News
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