Infrastructure Migration Engineer

About the Position

We are seeking a skilled Infrastructure Migration Engineer to join our team, supporting a migration program that focuses on transitioning virtual machines from legacy VMware environments into VMware Cloud Foundation 9.1 workload domains. This role requires a strong understanding of VMware technologies and migration practices, and may involve planned activities outside of core business hours, including evenings and weekends for migration preparations and validations. If you are passionate about working with cutting-edge cloud technologies and ensuring application availability during migrations, this opportunity may be the right fit for you.

Responsibilities

• Supporting the end-to-end migration of virtual machines from legacy VMware ESXi/vSphere environments into VMware Cloud Foundation 9.1 workload domains
• Executing migrations using the most appropriate method for the workload, primarily using HCX vMotion
• Validating source and destination readiness before migration activity, including vCenter, ESXi, storage, network, HCX, NSX-T, DNS, monitoring, backup, and application owner dependencies
• Identifying migration blockers early, including unsupported VM configurations, active snapshots, stale VMware Tools, RDMs, high-change-rate disks, network/firewall constraints, storage constraints, application dependencies, and backup conflicts
• Grouping workloads into sensible migration waves based on application dependencies, network segments, business criticality, maintenance windows, customer impact, and rollback options
• Supporting pre-migration, migration, and post-migration validation, including power-on checks, console access, network reachability, application validation, monitoring status, backup status, and operational handover
• Working with NSX-T networking teams to validate NSX segments, overlay networking, Edge connectivity, BGP, Distributed Firewall policy, Gateway Firewall policy, NAT, and network extension boundaries
• Troubleshooting migration issues across vCenter, ESXi, HCX, NSX-T, vMotion, vSphere Replication, storage, network latency, firewall, DNS, guest OS, VMware Tools, and application layers
• Producing and maintaining accurate migration documentation, including migration trackers, wave status, failed migration attempts, risk/issues, workaround details, post-migration checks, and lessons learned

Requirements

• Minimum 5 years of experience in VMware platform environments, with strong hands-on experience in VMware vSphere, vCenter Server, and ESXi
• Proven experience migrating production virtual machines between VMware environments, ideally across multi-cluster, multi-site, or multi-tenant platforms
• Strong understanding of vMotion, Storage vMotion, DRS, HA, resource pools, clusters, datastores, VM hardware versions, VMware Tools, vDS networking, port groups, and VMkernel networking
• Ability to interpret vCenter and ESXi events, tasks, alarms, logs, and migration failure messages to diagnose migration issues quickly
• Good understanding of storage impacts during migration, including datastore capacity, disk consolidation, thin/thick provisioning, snapshots, CBT, backup interaction, high-change-rate workloads, and storage latency
• Essential VMware Cloud Foundation 9.1 skills, including understanding management domains, workload domains, SDDC Manager, and lifecycle management
• Hands-on experience with VMware HCX or VCF workload mobility tooling and experience deploying, configuring, validating, or operating HCX Connector/source-side manager and HCX Cloud/target-side manager
• Fluent English

Nice to Have

• Experience with VCF Operations, VCF Automation, vSAN, HPE Alletra, Cisco UCS, Commvault, Veeam, or equivalent operational tooling
• Previous experience in a service provider, managed cloud, private cloud, or multi-tenant platform environment

We Offer

• Competitive salary: 6000-8000 PLN/hour
• Location: Białystok, Poland (Remote and Office options available)
• Employment Type: CONTRACT

About the Company

Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.