Senior System Engineer

Senior Systems Engineer | Smithtown, NY | On-Site | $130,000 - $180,000About the OpportunityA leading technology services organization is seeking a Senior Systems Engineer to support a long-term, enterprise-level client environment in Suffolk County, NY. This is a permanent, full-time position offering the opportunity to take ownership of a complex infrastructure environment while serving as the primary technical resource on-site.This role is ideal for an experienced infrastructure professional who enjoys working autonomously, solving complex technical challenges, and mentoring junior technical staff when needed.What You'll Be DoingAct as the primary on-site technical resource supporting a large, enterprise-scale environmentAdminister and maintain VMware virtual infrastructure, Windows Server environments, and Microsoft 365 servicesLead server, storage, networking, and infrastructure projectsManage backups, disaster recovery, and business continuity processesSupport firewalls, VPNs, switches, wireless infrastructure, and security technologiesPerform server migrations, upgrades, and infrastructure improvementsServe as an escalation point for technical issues and mentor junior engineersMaintain accurate documentation and provide proactive recommendations for environment improvementsRequired Experience5+ years of hands-on systems engineering or infrastructure support experienceStrong VMware vSphere administration experience (critical requirement)Windows Server administration and Active Directory expertiseExperience supporting Microsoft 365 and Exchange environmentsStrong networking knowledge including VPNs, routing, switching, and firewall technologiesExperience with backup and disaster recovery solutionsStrong troubleshooting skills across servers, networks, and applicationsExcellent communication skills with the ability to work independentlyPreferred ExperienceIndustry certifications such as VMware, Microsoft, Cisco, or CompTIAAzure and/or AWS experienceFortinet firewall experienceExperience leading infrastructure projects and mentoring junior team membersWhat's on OfferCompetitive salary: $130,000 - $180,000Medical, dental, and vision coverage401(k) planPet insurancePaid holidays plus an additional birthday day offLong-term career growth opportunitiesStable, permanent employment with a growing technology organizationIf you're an experienced infrastructure professional looking for a role where you can take ownership of a critical technical environment and have a direct impact on business operations, we'd like to hear from you.