System Administrator (On-Site)

Job Summary:

The Hybrid Microsoft 365 Messaging & Identity Administrator is responsible for the administration, maintenance, security, and strategic support of the County’s hybrid Microsoft messaging and identity infrastructure. This position manages Microsoft 365 and on-premises Microsoft technologies including Exchange Online, hybrid Exchange, and related collaboration systems.

The role serves as the lead technical resource for email systems administration, identity lifecycle management, directory synchronization, and Microsoft 365 tenant management.

Duties And Responsibilities

Microsoft 365 & Exchange Administration

• Administer and maintain hybrid Microsoft Exchange environments including Exchange Online and on-premises Exchange servers.
• Manage Microsoft 365 tenant administration including licensing, mailbox provisioning, retention policies, shared mailboxes, and distribution groups.
• Configure and maintain hybrid mail flow, connectors, transport rules, accepted domains, and mail routing.
• Administer Exchange Online Protection (EOP), spam filtering, quarantine management, and related email security controls.
• Monitor messaging systems for availability, performance, security events, and operational health.
• Perform mailbox migrations, tenant integrations, and messaging modernization projects.
• Troubleshoot advanced mail delivery, calendar, mobile device synchronization, authentication, and client connectivity issues.
• Maintain email archiving, retention, litigation hold, and compliance-related configurations.
• Coordinate maintenance windows, patching schedules, and upgrade activities for messaging infrastructure.
• Develop and maintain messaging standards, operational procedures, and documentation.
  
  

Identity & Access Management

• Administer hybrid identity synchronization.
• Manage directory synchronization, federation, and authentication services.
• Administer conditional access, and identity protection controls.
• Manage user lifecycle processes including provisioning, deprovisioning, role assignments, and access reviews.
• Support Single Sign-On (SSO) integrations and enterprise application authentication.
• Maintain privileged access controls and role-based access administration.
  
  

Security & Compliance

• Collaborate with cybersecurity personnel to support email security initiatives, incident response, threat mitigation, and vulnerability remediation.
• Assist with compliance requirements related to public sector regulations, records retention, legal hold, and auditing.
• Generate and review audit logs, message traces, sign-in logs, and security reports.
• Ensure compliance with County technology policies, security standards, and operational procedures.
  
  

Infrastructure & Operational Support

• Coordinate with server, virtualization, storage, and networking teams to support hybrid infrastructure dependencies.
• Support backup, disaster recovery, and continuity planning for messaging and identity systems.
• Participate in infrastructure modernization projects and cloud migration initiatives.
• Assist in evaluating Microsoft 365 roadmap changes, licensing impacts, and emerging technologies.
• Support mobile device and Outlook client integrations across County-owned systems.
• Provide Tier III escalation support for messaging and identity-related incidents.
• Participate in after-hours maintenance and on-call support rotations as assigned.
  
  

Documentation, Reporting & Project Support

• Maintain accurate technical documentation, diagrams, system inventories, operational procedures, and configuration standards.
• Develop reports and analytics related to messaging performance, licensing, usage, security events, and operational trends.
• Assist with vendor coordination, support escalations, maintenance renewals, and contract reviews.
• Participate in project planning, implementation, testing, and change management activities.
• Support departmental COOP/COG planning and technology recovery documentation.
• Provide technical guidance and mentorship to Help Desk and Infrastructure staff.
  
  

Minimum Qualifications

Education and Experience:

• Associate degree in Information Technology, Computer Science, Cybersecurity, or related field required.
• Bachelor’s degree preferred.
• Equivalent combinations of education, certifications, and progressively responsible experience may be considered.
• Minimum of five (5) years of progressively responsible experience administering Microsoft enterprise environments.
• Minimum of three (3) years supporting Microsoft 365 and hybrid Exchange environments.
• Experience supporting Active Directory, Azure AD (Entra ID), and identity synchronization technologies.
• Experience with enterprise email security, mail flow troubleshooting, and Microsoft Defender technologies.
• Experience supporting public sector, healthcare, financial, or highly regulated environments preferred.
  
  

Required Knowledge, Skills & Abilities

Technical Knowledge

• Microsoft 365 Administration
• Exchange Online and Hybrid Exchange
• Microsoft Entra ID (Azure AD)
• Active Directory Domain Services
• Azure AD Connect / Hybrid Identity
• Microsoft Defender for Office 365
• Exchange Online Protection (EOP)
• PowerShell scripting and automation
• Conditional Access and MFA
• DNS, SMTP, SPF, DKIM, and DMARC
• Windows Server administration
• Authentication and identity management concepts
• Backup, disaster recovery, and continuity planning
• Cybersecurity best practices and incident response principles
  
  

Skills & Abilities

• Strong troubleshooting and analytical abilities
• Ability to manage complex hybrid environments
• Excellent verbal and written communication skills
• Ability to prioritize multiple tasks and projects simultaneously
• Ability to work independently with minimal supervision
• Strong documentation and organizational skills
• Ability to explain technical concepts to non-technical personnel
• Ability to maintain confidentiality and protect sensitive information
• Ability to collaborate effectively across departments and technical teams
  
  

Preferred Certifications

The following certifications are preferred but not required:

• Microsoft 365 Certified: Messaging Administrator Associate
• Microsoft Certified: Identity and Access Administrator Associate
• Microsoft Certified: Azure Administrator Associate
• CompTIA Security
• CISSP
• ITIL Foundation
  
  

Position Objectives

Success in this position will be measured by:

• Stability and availability of messaging and identity systems
• Reduction of email security incidents and compromised accounts
• Timely resolution of escalated messaging and authentication issues
• Successful execution of Microsoft 365 modernization initiatives
• Compliance with security, retention, and operational standards
• Quality of documentation and operational readiness
• Contribution to COOP/COG and disaster recovery preparedness
• Effective collaboration with cybersecurity and infrastructure teams
  
  

Work Environment:

• Primarily office-based environment with occasional travel between facilities.
• Availability for after-hours support, emergency response, scheduled maintenance, and on-call rotations may be required.
• May require lifting and transporting computer equipment and related technology hardware.
• Office setting with a moderate noise level.
• The employee will work at an individual workstation, using a telephone and computer.
  
  

Physical Demands:

• Must be able to remain seated for extended periods.
• Regular use of a computer and other office machinery, such as printers and copy machines.
• Occasional movement around the office.
• Frequent communication via telephone.
  
  

Neumo Summary:

With the backing of four decades of public sector expertise and corporate capability, Neumo has successfully supported government services. Neumo was honored and recognized for four (4) consecutive years as a GovTech 100 Company representing the top 100 companies focused on making a difference in and selling to state and local government agencies across the United States.

Neumo is committed to helping communities thrive and brings a wealth of experience combined with innovation. Today, Neumo offers more administrative and financial support to government officials than any other organization. And with a responsive, client-focused approach, we foster partnerships that give our customers the certainty they need to accomplish more.

Neumo offers a competitive benefits and compensation package and are looking for team members who will thrive in our dynamic environment.

Neumo is an Equal Opportunity Employer. Selection for a position will be made without regard to race, religion, national origin, sex, political affiliation, marital status, non-disqualifying physical handicap, and age.