Senior IT Systems Administrator: Hybrid 365, AD & Security

Pond Lehocky Giordano Inc.; Philadelphia (Philadelphia County); Sur place; USD 90 000 - 110 000; Plein temps

Résumé du poste

Pond Lehocky Giordano is seeking a Systems Administrator to own day-to-day administration of our hybrid Microsoft 365 / Exchange Online environment, Entra ID, and on-premises Active Directory. You will manage HPE servers, SonicWall firewalls, and automation through PowerShell, with occasional travel to other offices.

You’ll collaborate with the Director of IT Operations, handle Tier 2/3 escalations, and contribute to end-to-end projects across multiple locations.

Qualifications

• 2–4 years of hands-on systems administration experience.
• Working knowledge of Microsoft 365 administration, including Exchange Online.
• Experience administering Active Directory and Group Policy in a Windows Server environment.
• Working knowledge of Entra ID: user and group management, MFA, and hybrid identity sync.
• Familiarity with basic Azure fundamentals (VMs, storage, networking).
• Understanding of DNS and DHCP, with the ability to troubleshoot name resolution.
• Working knowledge of HPE servers (ProLiant, iLO) or comparable enterprise server hardware.
• Working knowledge of SonicWall firewalls or comparable next-gen firewall platforms: rules, NAT, and VPN.
• Comfort with PowerShell for day-to-day administration.
• Strong troubleshooting skills and clear communication with non-technical users.
• Ability to travel occasionally between firm office locations and work occasional after-hours maintenance windows

Responsabilités

• Administer Microsoft 365 tenant services including Exchange Online, Teams, SharePoint, and OneDrive
• Support the hybrid Exchange environment: mailbox provisioning, shared mailboxes, permissions, distribution groups, and mail flow troubleshooting
• Manage licensing, user onboarding/offboarding, and tenant-level settings
• Maintain on-premises Active Directory: users, groups, OUs, service accounts, and AD health
• Manage Entra ID Connect / Cloud Sync and troubleshoot hybrid identity and device join issues
• Administer MFA, Conditional Access policies, and security group-based access
• Design, deploy, and troubleshoot Group Policy Objects
• Support Azure resources such as VMs, storage, networking, and backups
• Assist with Intune device enrollment, compliance, and configuration policies
• Administer HPE ProLiant servers: firmware and driver updates via iLO and SPP, hardware monitoring, and vendor RMA coordination
• Maintain Windows Server roles including DNS, DHCP, and file services
• Manage internal and external DNS records and resolve name resolution issues
• Administer SonicWall firewalls: access rules, NAT, site-to-site and SSL VPN, firmware updates, and security services
• Write and maintain PowerShell scripts to automate routine administration
• Patch servers and monitor backups, alerts, and system health
• Serve as Tier 2/3 escalation for the help desk
• Document systems, procedures, and changes
• Participate in projects across multiple office locations, with occasional after-hours maintenance windows

Connaissances

Microsoft 365 admin

Exchange Online

Active Directory

Group Policy

Entra ID

Azure basics

DNS & DHCP

HPE ProLiant

SonicWall firewalls

PowerShell

Troubleshooting

Travel availability

Outils

Datto RMM

ESET

Intune

Description du poste

Pond Lehocky Giordano is seeking a Systems Administrator to own day-to-day administration of our hybrid Microsoft 365 / Exchange Online environment, Entra ID, and on-premises Active Directory. You will manage HPE servers, SonicWall firewalls, and automation through PowerShell, with occasional travel to other offices.

You’ll collaborate with the Director of IT Operations, handle Tier 2/3 escalations, and contribute to end-to-end projects across multiple locations.