System Administrator (On-Site)

Neumo Holdings LLC•Stroudsburg, PA

2d•Onsite

About The Position

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.

Requirements

Associate degree in Information Technology, Computer Science, Cybersecurity, or related field required.
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.
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
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

Nice To Haves

Bachelor’s degree preferred.
Equivalent combinations of education, certifications, and progressively responsible experience may be considered.
Experience supporting public sector, healthcare, financial, or highly regulated environments preferred.
Microsoft 365 Certified: Messaging Administrator Associate
Microsoft Certified: Identity and Access Administrator Associate
Microsoft Certified: Azure Administrator Associate
CompTIA Security+
CISSP
ITIL Foundation

Responsibilities

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.
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.
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.
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.
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.