> Markdown version of [/jobs/ext/1179629-application-systems-support-level-iii](https://www.wearedevelopers.com/jobs/ext/1179629-application-systems-support-level-iii). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Application & Systems Support (Level III) - **Company:** Mandelbaum Company, L.L.C. - **Location:** Roseland, NJ, United States - **Experience:** Experienced - **Salary:** $65,000.0 - $75,000.0 - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Active Directory, Business Software, Collaborative Software, Dynamic Host Configuration Protocol, Document Management Systems, Domain Name System (DNS), Identity and Access Management, Issue Tracking Systems, Virtual Private Networks (VPN), Python (Programming Language), Network Security, Network Troubleshooting, Network Architecture, Print Servers, Windows PowerShell, Azure Active Directory, Microsoft SharePoint, TCP/IP, Software Vulnerability Management, Wireless Access Point, Wireless Networks, Scripting, Firewalls (Computer Science), Juniper, Information Technology, Palo Alto Networks, Patch Management, Fortinet, Cisco, Service Stack, User Accounts - **Published:** July 4, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=cf3958d59090a6c9 ## About the Role * Bachelor's degree in IT, Computer Science, or related field preferred. * Industry certification such as Network+, Security+, Microsoft SC-200, MD-102, and CCNA preferred * 3+ years of experience in IT support, systems administration, or infrastructure support. * Strong knowledge of Windows environments, Active Directory, and Microsoft 365 administration. * Experience with networking and security solutions from Cisco, Aruba, Ruckus, Juniper, Meraki, Fortinet, and/or Palo Alto Networks is preferred. * Proficiency in Microsoft 365 collaboration tools. * Experience supporting network infrastructure including TCP/IP, DNS, DHCP, VPN, and wireless. * Experience managing endpoint fleets and patch management systems. * Experience managing print servers and enterprise printing environments. * Experience with scripting or automation tools such as PowerShell or Python. * Understanding of identity management, endpoint protection, and security practices. * Strong troubleshooting and analytical skills. * Excellent communication skills and ability to support non-technical users. ## Description We are seeking a skilled IT Application & Systems Support (Level III) professional to join our law firm in Roseland, NJ. This role is designed for an experienced support technician who combines hands-on technical troubleshooting with systems administration responsibilities. The ideal candidate is a team player who enjoys working directly with employees, onboarding new technologies, and augmenting department workflows to increase productivity. This role will support the firm's technology stack across applications, identity management, networking, firewalls, switches, and endpoint systems, ensuring stability, security, and efficiency across all offices and remote environments., * Provide exceptional technical support via phone, email, and in-person assistance to employees. * Administer Active Directory and Azure AD / Entra ID including group policies. * Manage user accounts, permissions, and role-based access controls. * Deploy, manage, and troubleshoot switch, access point, and firewall infrastructure. * Deliver remote and on-site assistance to users to enhance productivity. * Support business applications used by legal teams including Microsoft 365 and document management systems. * Support Microsoft 365 administration including Exchange Online, Teams, SharePoint, and OneDrive. * Troubleshoot network issues including DNS, DHCP, VPNs, and wireless networking. * Support and maintain print servers and enterprise printing environments. * Manage patch deployment across the firm's fleet of desktops, laptops, and mobile devices. * Maintain IT documentation and configurations. * Track support requests through the ticketing system and ensure SLA compliance. * Coordinate with vendors for escalation and issue resolution. * Audit and augment departmental workflows via automation and new technologies. * Assist with system upgrades, infrastructure improvements, and new technology deployments. * Support implementation of security best practices and vulnerability remediation. * Travel to external locations as necessary to provide on-site support. * Be available for on-call support during nights, weekends, and holidays as needed. ## Related Videos - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [An Applied Introduction to eBPF with Go](https://www.wearedevelopers.com/videos/1075-an-applied-introduction-to-ebpf-with-go) - [How Cisco embraced a DevOps culture within its network engineering team](https://www.wearedevelopers.com/videos/99-how-cisco-embraced-a-devops-culture-within-its-network-engineering-team) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Turning Container security up to 11 with Capabilities](https://www.wearedevelopers.com/videos/718-turning-container-security-up-to-11-with-capabilities) - [Computer Vision from the Edge to the Cloud done easy](https://www.wearedevelopers.com/videos/263-computer-vision-from-the-edge-to-the-cloud-done-easy) ## Related Articles - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Best Coding Boot Camps in Germany](https://www.wearedevelopers.com/magazine/237-best-coding-boot-camps-in-germany) - [System change: restart as developer?](https://www.wearedevelopers.com/magazine/39-system-change-restart-as-developer) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again)