Senior IT Systems and Infrastructure Specialist

The Senior IT Systems & Infrastructure Specialist is a full-time, on-site position based in Rockaway, NJ, responsible for the administration, security, performance, and lifecycle management of the organization’s IT infrastructure and enterprise systems. This role oversees the maintenance and optimization of servers, networks, firewalls, endpoints, Microsoft 365, and related business applications to ensure reliable, secure, and scalable technology operations. Key responsibilities include monitoring system performance and security, managing access controls, implementing cybersecurity measures, maintaining backup and disaster recovery capabilities, and serving as a senior escalation point for complex technical issues.

The specialist also leads and supports infrastructure upgrades, system integrations, technology projects, and continuous improvement initiatives while maintaining technical documentation, supporting IT compliance requirements, and collaborating with internal teams to align technology solutions with organizational needs and business continuity objectives.

• Lead the day-to-day administration, operation, performance, security, and lifecycle management of local and remote IT infrastructure, including servers, workstations, networks, firewalls, switches, wireless systems, telecommunications, and connected devices.
• Administer and support Windows Server, Microsoft 365, Active Directory, email, file/print services, databases, document management systems, backups, and related enterprise applications.
• Design, implement, maintain, and optimize secure, reliable, scalable IT infrastructure aligned with organizational objectives and business requirements.
• Provide advanced technical support and serve as a senior escalation point for complex hardware, software, systems, and network issues, including troubleshooting, repair, maintenance, and root-cause analysis.
• Manage user accounts, permissions, security groups, access rights, and system memberships in accordance with security, access-control, and least-privilege requirements.
• Implement and maintain cybersecurity controls, including firewalls, endpoint protection, encryption, vulnerability management, monitoring, access controls, security testing, and incident response.
• Monitor enterprise systems and networks for threats, vulnerabilities, and unauthorized activity; investigate and respond to cybersecurity incidents and other critical technology events.
• Manage network infrastructure, including switching, routing, VLANs, wireless technologies, firewalls, and core network services.
• Plan and implement system upgrades, patches, infrastructure projects, technology enhancements, and new solutions in accordance with change-management and security procedures.
• Maintain and test backup, disaster recovery, business continuity, and incident response processes; participate in the resolution of outages, emergencies, and other operational disruptions.
• Research emerging technologies, cybersecurity threats, and industry best practices and recommend modernization, risk mitigation, and process improvements.
• Maintain accurate IT asset inventories, system documentation, network diagrams, configurations, licenses, warranties, and lifecycle records.
• Establish and maintain IT standards, procedures, and best practices that promote secure, reliable, efficient, and compliant operations.
• Ensure IT operations comply with organizational policies, licensing requirements, security standards, industry best practices, and applicable regulations.
• Support employee onboarding, technology training, and security awareness initiatives; mentor junior IT staff and provide technical guidance as a senior technical resource.
• Provide regular and on-call technical support and perform other IT responsibilities necessary to support organizational objectives and business continuity.

• Demonstrated experience administering enterprise IT environments, including Windows workstations and servers, Microsoft 365, Active Directory, email/Exchange, enterprise applications, file/print services, remote access, and end-user systems.
• Strong knowledge of networking principles and protocols, including TCP/IP, DNS, DHCP, SMTP, HTTP/HTTPS, SFTP, LDAP, ARP, VLANs, routing, and switching.
• Hands-on experience managing network infrastructure, firewalls, wireless systems, endpoint security, encryption, access controls, vulnerability management, security…