[Remote] OS \/ Infrastructure Administrator Lead

Note: The job is a remote job and is open to candidates in USA. Elfonze Technologies is seeking an experienced OS / Infrastructure Administrator Lead to join their IT operations team. The successful candidate will be responsible for overseeing virtualization platforms, Windows Server environments, and cloud infrastructure, while leading complex migration projects from planning through execution.ResponsibilitiesPlan, schedule, and execute ESXi host upgrades across development, test, and production environments with minimal business disruptionApply driver updates, firmware patches, and VMware Tools refreshes in accordance with VMware compatibility matricesConduct thorough post-upgrade host validation including vSphere cluster health checks, datastore integrity, and network connectivity verificationMaintain upgrade documentation, change records, and rollback procedures for all ESXi lifecycle activitiesMonitor ESXi host performance, resource utilisation, and HA/DRS configurations to ensure optimal virtualisation efficiencyLead end-to-end migration of virtual machines from VMware vSphere to Microsoft Hyper-V, covering planning, execution, validation, and hypercarePerform VM hardware version upgrades and compatibility assessments prior to migration, ensuring alignment with target Hyper-V environment requirementsExecute VMware Tools removal and replacement with Hyper-V Integration Services as part of the migration workflowDevelop and maintain detailed migration runbooks covering pre-migration checks, execution steps, rollback procedures, and post-migration validation scriptsConduct compatibility validation of applications, network configurations, and storage mappings after migration to Hyper-VDesign and deliver Hyper-V administration training sessions for internal IT team members, building in-house capability and reducing dependency on external supportProduce knowledge-transfer documentation covering Hyper-V architecture, VM lifecycle management, checkpoints, and networking configurationPlan and execute in-place upgrades and clean installations of Windows Server operating systems (2016 / 2019 / 2022), including pre-upgrade assessment and compatibility reviewManage patch lifecycle for all Windows Server environments ensuring compliance with security and operational baselinesAdminister Active Directory, DNS, DHCP, Group Policy, and file services in support of enterprise infrastructureCoordinate server decommissions, consolidations, and role migrations as part of infrastructure refresh programmesMaintain server hardening configurations and contribute to security compliance activitiesDesign, implement, and manage enterprise backup strategies covering physical servers, virtual machines, and cloud workloadsAdminister backup solutions (e.g. Veeam, Veritas NetBackup, Azure Backup) ensuring scheduled jobs, retention policies, and offsite replication are operationalPlan and conduct regular recovery drills, validating RTO and RPO targets across critical systemsRespond to and manage recovery scenarios including full server restores, file-level recoveries, and VM rollbacksMaintain backup inventory, reporting dashboards, and escalation procedures for backup failuresLead infrastructure migration projects as the primary technical authority, from scoping and planning through execution and post-migration supportDevelop project plans, risk registers, migration runbooks, and stakeholder communication packsCoordinate with application teams, network engineers, security, and business stakeholders to align migration windows and minimise impactChair migration readiness reviews, cutover planning sessions, and post-migration retrospectivesMaintain hands-on delivery participation throughout all project phases — not limited to oversight onlyProvide infrastructure support and operational oversight for AWS environments including EC2, VPC, S3, IAM, CloudWatch, and related servicesContribute to hybrid cloud architecture discussions, supporting workload placement decisions across on-premises and AWSApply AWS best practices for security, cost optimisation, and high availability in line with organisational cloud governanceSupport cloud migration assessments and lift-and-shift activities where applicableSkills10 – 12 Years of hands-on experience in OS administration, virtualisation, and infrastructure projects — with demonstrated lead-level ownership of migration programmesHands-on proficiency in ESXi upgrade procedures, including SUM/VUM-based upgrades, offline bundle upgrades, and driver/firmware update workflowsDemonstrated experience in VMware to Hyper-V migrations at scale, including hardware version upgrades, compatibility validation, and runbook authorshipStrong Windows Server administration skills across 2016, 2019, and 2022 — in-place upgrades, role migrations, and security baseline managementProven experience designing and managing enterprise backup solutions with validated recovery testingWorking knowledge of AWS core services: EC2, S3, VPC, IAM, CloudWatch, Route 53, and related infrastructure servicesExperience developing migration runbooks, cutover plans, and post-migration validation checklistsAbility to design and deliver technical training material for team capability upliftProven track record of leading infrastructure migration projects from initiation through to post-migration hypercareAbility to operate as both a technical lead and a hands-on engineer — comfortable owning delivery personally, not only directing othersStrong stakeholder communication and documentation skills, capable of producing clear technical and executive-facing artefactsStructured approach to problem-solving under pressure, particularly during migration cutover windowsMentoring and knowledge-transfer experience within IT operations teamsVMware Certified Professional — Data Centre Virtualisation (VCP-DCV)VMware Certified Advanced Professional (VCAP) — preferredMicrosoft Certified: Windows Server Hybrid Administrator AssociateAzure / Hyper-V Administration (AZ-800 / AZ-801)AWS Certified SysOps Administrator — AssociateAWS Certified Solutions Architect (preferred)Veeam Certified Engineer (VMCE) — advantageousITIL Foundation or equivalent ITSM qualificationCompany OverviewElfonze Technologies, a Great Place to Work-Certified™ company & is a dynamic IT and Engineering Consulting and Services company, uniquely positioned at the intersection of technology and engineering expertise. It was founded in 2020, and is headquartered in Bengaluru, Karnataka, IND, with a workforce of 201-500 employees. Its website is https://www.elfonze.com/.Company H1B SponsorshipElfonze Technologies has a track record of offering H1B sponsorships, with 2 in 2025, 5 in 2024. Please note that this does not guarantee sponsorship for this specific role.