Senior Systems Administrator / Family Office / NYC

New York, New YorkHybridFull Time$175k - $2250kJob DescriptionA leading financial organization is seeking a Senior Systems Administrator to serve as a hands-on technical leader and day-to-day owner of IT infrastructure and operations. This role will play a critical part in maintaining the stability, reliability, and security of a high-touch corporate technology environment, supporting both on-premises and cloud infrastructure across multiple sites.As a Senior Systems Administrator, you'll take ownership of Windows and Microsoft cloud infrastructure while also supporting Linux systems, endpoints, networking, and enterprise applications. You'll work closely with Engineering Management and senior engineers on onsite execution, troubleshoot complex issues across hybrid environments, establish operational best practices, and create the documentation and structure needed to support a growing IT organization.This is an opportunity for an experienced infrastructure professional who enjoys being highly hands-on while also taking ownership of processes, mentoring junior team members, and improving the overall quality of IT operations. The ideal candidate brings deep Microsoft expertise, strong troubleshooting and root-cause analysis skills, and the judgment and service orientation required to support executive users and demanding enterprise environments.This is a full-time, exempt position based in New York City. The role offers the opportunity to work in a sophisticated financial services environment where reliability, security, responsiveness, and a high level of technical ownership are essential.Required Skills & Experience5+ years of progressive experience in systems administration, infrastructure engineering, or a similar IT roleFour-year degree in Computer Science, Information Systems, or a related field, or an equivalent combination of certifications and progressive infrastructure experienceStrong proficiency with Microsoft Windows Server and core infrastructure services, including Active Directory, DNS, DHCP, Group Policy, DFS, WSUS, Hyper-V, and Terminal ServicesStrong proficiency with Microsoft 365 and Azure, including Entra ID, Azure Storage, Enterprise Applications, Azure Networking, and Virtual MachinesStrong proficiency with Windows 10/11 and Microsoft Office productsExperience administering Linux environments, including Debian and FedoraStrong troubleshooting skills across endpoints, servers, applications, networks, and infrastructureExperience managing multi-domain forests, multiple sites, and hybrid Active Directory environmentsExperience with endpoint management and device security solutionsExperience with PowerShell and other scripting languagesExperience with enterprise WiFi systems such as ArubaKnowledge of networking and security fundamentalsExperience with backup, disaster recovery, and business continuity planningAbility to operate with a high degree of ownership and accountabilityCalm and composed under pressure with strong situational judgmentService-oriented mindset with a high-touch approach to executive and end-user supportDesired Skills & ExperienceExperience with Google WorkspaceExperience with AWS and/or Google CloudExperience supporting financial services or another highly demanding enterprise environmentFamiliarity with security and compliance frameworks such as SOC 2 and financial services controlsExperience establishing IT troubleshooting, ticketing, escalation, and operational best practicesExperience creating SOPs, runbooks, technical documentation, and infrastructure standardsStrong mentoring and knowledge-sharing skills with the ability to develop junior IT team membersExperience supporting enterprise networking and wireless infrastructureStrong understanding of root-cause analysis and proactive problem solvingExperience working in high-touch corporate environments supporting executives and senior stakeholdersWhat You Will Be Doing Daily Responsibilities Administer Windows and Linux infrastructure across on-premises and cloud environmentsManage Active Directory, Entra ID, DNS, DHCP, Group Policy, DFS, WSUS, Hyper-V, and Terminal ServicesManage Microsoft 365 and Azure infrastructure, including Entra ID, Storage, Enterprise Applications, Azure Networking, and Virtual MachinesSupport Windows 10/11 endpoints and Microsoft Office productivity toolsAdminister endpoint management and device security platformsTroubleshoot complex infrastructure issues across hybrid on-premises and cloud environmentsSupport multi-site, multi-domain, and hybrid Active Directory environmentsProvide phone, email, chat, and remote technical assistance as neededEstablish and maintain best practices for troubleshooting, ticket handling, and escalationCreate and maintain clear technical documentation, SOPs, and runbooksProvide ongoing training, mentoring, and feedback to junior team membersSupport enterprise WiFi infrastructure, including Aruba environmentsApply networking and security fundamentals to daily infrastructure operationsPerform root-cause analysis and implement preventative solutions to reduce recurring issuesSupport backup, disaster recovery, and business continuity initiativesCoordinate with the Head of IT on principal and residential technology needs as appropriateParticipate in an on-call escalation rotation as requiredMaintain a high-touch, professional end-user experience across the organizationThe OfferYou will receive the following:Full-Time, Exempt PositionNew York City-based opportunityOpportunity to take ownership of enterprise IT operations and infrastructureHands-on exposure to Microsoft Azure, Microsoft 365, Windows, Linux, networking, and endpoint technologiesOpportunity to work closely with Engineering Management and senior technical leadershipAbility to establish best practices, documentation, and operational standards across a growing environmentApplicants must be authorized to work in the US on a full-time basis now and in the future.