> Markdown version of [/jobs/ext/3208539-infrastructure-support-engineer-tier-iii-msp](https://www.wearedevelopers.com/jobs/ext/3208539-infrastructure-support-engineer-tier-iii-msp). 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). --- # Infrastructure Support Engineer, Tier III | MSP - **Company:** LTD Global - **Location:** Syosset, NY, United States - **Experience:** Experienced - **Salary:** $110,000.0 - $130,000.0 - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Active Directory, Microsoft Online Services, Microsoft Outlook, Dynamic Host Configuration Protocol, Domain Name System (DNS), Virtual Private Networks (VPN), Windows Servers, Networking Basics, Windows PowerShell, Remote Desktop Services, Azure Active Directory, Microsoft SharePoint, TCP/IP, EndPointSecurity, Microsoft InTune, Falcon Platform, SentinelOne Expertise, User Administration - **Published:** September 5, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=93e86830c2441034 ## About the Role The ideal candidate is client-facing, technically sharp, and thrives in a fast-paced MSP environment supporting multiple customers with varying infrastructure., * 5+ years of desktop support experience (including escalation support) * Strong Windows 10/11 troubleshooting experience in business environments * Strong knowledge of Active Directory, Group Policy, and user administration * Experience supporting Microsoft 365 (Exchange Online, Teams, OneDrive, SharePoint) * Solid understanding of networking fundamentals (TCP/IP, DNS, DHCP, VPN) * Experience working in an MSP or multi-client environment * Strong customer service skills with the ability to manage multiple priorities * Ability to work onsite at client locations when needed Preferred Qualifications * Experience with Intune, Azure AD, Conditional Access, and endpoint compliance policies * Familiarity with RMM and PSA tools (ConnectWise, Autotask, Kaseya, NinjaOne, etc.) * PowerShell scripting experience for automation and troubleshooting * Experience with endpoint security tools (SentinelOne, CrowdStrike, Defender for Endpoint) * Certifications such as CompTIA A+, Network+, Microsoft certifications, or ITIL, How many years of experience do you have working for a managed service provider (MSP)? ## Description Escalation & Advanced Support * Serve as the primary escalation point for complex desktop, end-user, and workstation-related issues * Troubleshoot advanced Windows OS, application, profile, and performance issues * Resolve issues involving Active Directory, Group Policy, DNS/DHCP, and authentication failures * Provide root cause analysis and long-term resolution planning for recurring problems Client-Facing Technical Support * Provide high-touch support for executive/VIP users across multiple client environments * Communicate effectively with end users and stakeholders, translating technical concepts into clear solutions * Support both remote and onsite troubleshooting as needed across the NYC metro area Microsoft 365 & Endpoint Support * Support and troubleshoot Microsoft 365 services including Outlook, Exchange Online, Teams, OneDrive, and SharePoint * Manage and troubleshoot endpoint management tools such as Intune, Azure AD, and MDM policies * Support MFA issues, conditional access troubleshooting, and identity-related incidents Infrastructure & Systems Support * Assist with server-level troubleshooting (Windows Server environments) when desktop issues overlap * Support printers, networking connectivity issues, VPN access, and remote desktop environments * Collaborate with Network/System Engineers to resolve infrastructure-related incidents Project Support & Implementation * Assist with workstation deployments, migrations, and onboarding/offboarding processes * Support Windows 10/11 upgrades, hardware refreshes, and endpoint security rollouts * Contribute to implementation of new tools, standardization efforts, and client technology improvements Documentation & Knowledge Sharing * Create and maintain technical documentation and KB articles * Improve SOPs and troubleshooting workflows for Level 1 and Level 2 teams * Provide mentorship and guidance to junior technicians ## 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) - [This Is Not Your Father's .NET](https://www.wearedevelopers.com/videos/967-this-is-not-your-father-s-net) - [Turning Container security up to 11 with Capabilities](https://www.wearedevelopers.com/videos/718-turning-container-security-up-to-11-with-capabilities) - [Introducing Digital Samba Embedded Video Conferencing API MCP Server](https://www.wearedevelopers.com/videos/1640-introducing-digital-samba-embedded-video-conferencing-api-mcp-server) - [Hacking MSSQL on Cloud. All of them. How I became sysadmin on Azure, AWS, GCP and Alibaba.](https://www.wearedevelopers.com/videos/100339-hacking-mssql-on-cloud-all-of-them-how-i-became-sysadmin-on-azure-aws-gcp-and-alibaba) ## Related Articles - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers) - [Best Companies to work for in London: Top 25 Companies in 2023](https://www.wearedevelopers.com/magazine/187-best-companies-to-work-for-in-london-top-25-companies-in-2023) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)