Job Description

Centurion is looking to hire a Sr. Systems Engineer for our client in Washington, DC.  This position is 12+ months in duration.  This is onsite in Washington, DC. Open to US Citizens only. 

Position Requirements:
Exchange On-Premises Administration (20%)
• Manage and maintain Microsoft Exchange Server 2016/2019/SE infrastructure including mailbox databases, DAGs, and high availability
• Perform server maintenance, patching, certificate management, and capacity planning
• Troubleshoot mail flow issues, connectivity problems, and performance bottlenecks
• Configure transport rules, connectors, and Client Access Services
• Manage integration with Enterprise Vault for legacy archive access

Exchange Online Administration (20%)
• Administer Microsoft 365 Exchange Online environment and hybrid configuration
• Manage mailbox migrations from on premises to Exchange Online
• Configure Exchange Online Protection (EOP), DLP policies, and mail flow rules
• Implement retention policies, eDiscovery, and compliance features
• Monitor service health and manage M365 compliance requirements
• Oversee migration from Enterprise Vault to M365 native archiving/retention

Microsoft Teams Administration (25%)
• Administer Teams environment including team/channel governance and lifecycle policies
• Configure Teams voice features including Direct Routing, calling policies, and phone system
• Manage Teams apps, bots, custom integrations, and connector policies
• Implement Teams compliance including retention, eDiscovery, communication compliance, and information barriers
• Configure guest access, external access, meeting policies, and live events
• Troubleshoot Teams connectivity, quality issues, and client problems
• Manage Teams device administration (phones, room systems, displays)

Email Security & Proofpoint Administration (15%)
• Administer Proofpoint Email Security platform and configure filtering policies
• Manage threat protection including TAP, URL Defense, and Attachment Defense
• Monitor and respond to security incidents and phishing campaigns
• Implement and maintain email authentication (DMARC, SPF, DKIM) and encryption
• Generate compliance and security reports

M365 Ecosystem & Power Platform Support (10%)
• Support Power Automate flows integrating with Exchange, Teams, and SharePoint
• Assist with Power Platform governance, DLP policies, and connector security
• Maintain integration points between SharePoint Online, OneDrive, and Teams
• Support automation solutions leveraging M365 services
• Understand licensing implications across M365 workloads

Automation & Scripting (10%)
• Develop and maintain PowerShell scripts for Exchange, Teams, and M365 automation
• Utilize Microsoft Graph API for advanced automation and reporting
• Create bulk operation scripts for user provisioning, migrations, and configuration changes
• Automate routine administrative tasks and reporting
• Document and maintain script libraries and automation workflows

Additional Duties
• Participate in on-call rotation to provide Tier 2 support for M365 Platform
• Provide Tier 3 support for escalated email and Teams issues
• Document configurations, maintain procedures, and train staff
• Collaborate with IT security and compliance teams on email and collaboration security initiatives
• Assist with M365 governance and adoption planning

Required Technology & Experience

Experience Requirements
• 3-5 years email and collaboration platform administration experience
• Microsoft Exchange Server (2016 or later) administration experience
• Exchange Online and Microsoft 365 administration experience
• Microsoft Teams administration experience
• Proven experience with hybrid Exchange environments and cloud migrations
• PowerShell scripting experience for automation and bulk operations
• Email security platform administration (Proofpoint preferred)

Required Technical Skills
Exchange & Email
• Exchange Server 2016/2019/SE and Exchange Online administration
• Hybrid Exchange configuration and coexistence management
• Email security protocols (SPF, DKIM, DMARC, TLS/SSL, MTA-STS)
• Mail flow troubleshooting and transport rule configuration
• Mailbox migration tools and methodologies

Microsoft Teams
• Teams administration including governance, policies, and compliance
• Teams voice/calling configuration (Phone System, Direct Routing)
• Teams PowerShell module and Microsoft Graph API
• Meeting and live event configuration
• Teams device administration

M365 Platform
• Microsoft 365 Admin Center, Security & Compliance Center, and Teams Admin Center
• Azure AD/Entra ID administration and conditional access
• Microsoft 365 licensing and service management
• DLP policies and information protection across workloads

Security & Compliance
• Proofpoint Email Protection platform (or similar email security solution)
• eDiscovery and content search across Exchange and Teams
• Retention policies and records management
• Compliance features including communication compliance and information barriers

Scripting & Automation
• PowerShell scripting (Exchange Management Shell, Exchange Online PowerShell, Teams PowerShell)
• Microsoft Graph API basics
• Automation and bulk operations scripting
• Basic understanding of Power Automate

Infrastructure
• Active Directory and DNS management
• Certificate management and PKI basics
• Load balancers and network connectivity concepts
• Windows Server administration

Preferred Qualifications
• Microsoft 365 Certified: Messaging Administrator Associate (MS-203)
• Microsoft 365 Certified: Teams Administrator Associate (MS-700)
• Microsoft Certified: Security, Compliance, and Identity Fundamentals (SC-900)
• Proofpoint Certified Administrator
• Experience with Enterprise Vault administration and EV-to-M365 migrations
• Experience with Power Platform (Power Automate, Power Apps)
• Knowledge of regulatory compliance frameworks (GDPR, HIPAA, SOX, etc.)
• Experience with Microsoft Teams voice/calling and Direct Routing
• GitHub/version control for script management

Desired Soft Skills
• Strong analytical and troubleshooting abilities
• Excellent documentation and communication skills
• Ability to work independently and manage multiple priorities
• Customer service orientation for end-user support
• Proactive approach to system monitoring and maintenance