Windows Systems Administrator (L3 Support) (Spring) at HCLTech

job Title: Windows Systems Administrator (L3 Support)Location: Spring, TXJob Type: FulltimePosition Summary:We are seeking a highly experienced and self-directed Windows and VMware Systems Administrator (L3) to join our managed services team. This role involves advanced troubleshooting, infrastructure optimization, and technical leadership in a fast-paced, service provider-grade environment. You will be responsible for resolving complex issues, driving root cause analysis, and maintaining high availability across Windows and VMware platforms.Key Responsibilities:Technical Support & TroubleshootingResolve complex configuration and infrastructure issues through simulation and analysis.Perform deep technical problem isolation and root cause analysis.Escalate to vendor (L4) support when necessary to meet SLAs.Correlate incident trends into problem management and implement permanent fixes.Infrastructure ManagementAdminister and optimize Windows Server environments (AD, DNS, GPO).Manage VMware vSphere environments including ESXi, vCenter, SRM, and vMotion.Execute monthly patch management and infrastructure updates.Conduct lab simulations and compatibility testing for new builds.Client Engagement & ReportingGenerate customer-facing incident reports and operational summaries.Conduct regular client support visits and technical review meetings.Present root cause corrective actions and trend analysis to stakeholders.Project & Process LeadershipArchitect and enhance managed service offerings and infrastructure.Participate in RFP responses and pre-sales technical discussions.Maintain ITIL-based ticketing and documentation standards.Required Skills & Experience:10+ years in enterprise Windows environments with multi-site domains.5+ years in VMware vSphere administration with clustered storage and HA.Strong knowledge of Active Directory, Group Policy, DNS, DHCP.Experience with NetApp SAN, Cisco UCS, HP DL servers, and CommVault.Demonstrated experience in service level management and RCA reporting.Certifications (Preferred):Microsoft: MCSA / MCSE / MCITP (Windows Server 2008 or higher)VMware: VCP-DCV (vSphere 5.x or higher)ITIL Foundation CertifiedSoft Skills:Excellent communication and client-facing skills.Strong documentation, reporting, and presentation abilities.Ability to manage priorities, timelines, and cross-functional collaboration.Disclaimer HCL is an equal opportunity employer, committed to providing equal employment opportunities to all applicants and employees regardless of race, religion, sex, color, age, national origin, pregnancy, sexual orientation, physical disability or genetic information, military or veteran status, or any other protected classification, in accordance with federal, state, and/or local law. Should any applicant have concerns about discrimination in the hiring process, they should provide a detailed report of those concerns to [email protected] for investigation. Compensation and BenefitsA candidates pay within the range will depend on their work location, skills, experience, education, and other factors permitted by law. This role may also be eligible for performance-based bonuses subject to company policies. In addition, this role is eligible for the following benefits subject to company policies: medical, dental, vision, pharmacy, life, accidental death & dismemberment, and disability insurance; employee assistance program; 401(k) retirement plan; 10 days of paid time off per year (some positions are eligible for need-based leave with no designated number of leave days per year); and 10 paid holidays per year.