Senior Server Engineer - Exchange and Cloud Infrastructure

Cook Systems • Atlanta, GA

2d • Hybrid

About The Position

The Senior Server Engineer (Contract) is responsible for leading the engineering, troubleshooting, and optimization of enterprise messaging platforms including Microsoft 365 Exchange, Exchange on-premises, Proofpoint, Defender for Email, and Azure-based identity and security services. The role involves providing advanced support, assisting with migrations and modernization initiatives, enhancing security posture, and serving as a subject matter expert for email and messaging infrastructure.

Requirements

• 7+ years professional experience supporting enterprise messaging systems.
• Deep hands-on knowledge of Microsoft 365 Exchange Online, Exchange Server (2013/2016/2019), and hybrid Exchange coexistence and migrations.
• Strong experience administering Proofpoint Essentials/Enterprise Protection and Defender for Email/Microsoft Defender for Office 365.
• Strong troubleshooting skills in email routing, SMTP protocols, and DNS (MX, SPF, DMARC, DKIM).
• Experience with Azure AD and identity integration.
• Strong communication and documentation skills.
• Ability to explain complex technical concepts clearly to leadership and non-technical audiences.
• Capable of working independently with minimal supervision.
• Excellent analytical and problem-solving capabilities.

Nice To Haves

• PowerShell scripting for automation and reporting.
• Experience working in government, education, financial, or regulated environments.
• Familiarity with message trace tools, transport rule design, and Microsoft Purview compliance solutions.
• Ability to provide architecture guidance and evaluation of new email security technologies.

Responsibilities

• Lead administration and optimization of Microsoft 365 Exchange Online and on-prem Exchange infrastructure.
• Manage mail flow, routing, retention policies, compliance, and hybrid configurations.
• Support Exchange infrastructure upgrades, migrations, and service modernization.
• Administer Proofpoint email security platform, including spam filtering, DLP policies, encryption settings, quarantine, and forensic analysis.
• Manage Defender for Email (MDO) including ATP, anti-phishing, safe attachments, and threat intelligence.
• Troubleshoot and analyze advanced email delivery, threat detection, and user issues.
• Support Azure AD integration with M365 services, SSO, and hybrid identity synchronization.
• Assist with security baselines, conditional access, and identity hardening recommendations.
• Lead major incident resolution for messaging and email security services.
• Perform root cause analysis and provide corrective and preventive action recommendations.
• Develop dashboards and reporting for message flow trends, security detection, and Exchange and M365 service metrics.
• Create or update operational SOPs, architecture diagrams, runbooks, and root cause and service reports.
• Mentor internal engineering and operations staff as needed.

Benefits

• Choose from two comprehensive medical plans through Blue Cross Blue Shield, with dental and vision coverage included.
• Protect what matters most with life, critical illness, and accident insurance through Unum
• Plan ahead and save with a Flexible Spending Account and Daycare FSA through Navia
• Our Health Gap Insurance through Sun Life helps cover unexpected costs
• Build your future with our 401(k) plan through The Standard. You’re eligible after just six months

What This Job Offers

• Career Level: Mid Level
• Education Level: No Education Listed
• Number of Employees: 101-250 employees