Infrastructure Migration Engineer (f/m/x)

Sii Poland; Kraków; On-site; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Great Place to Work

Profit sharing

Medical care

Hybrid work-friendly environment

Centre of internal trainings

Many experts you can learn from

Open and accessible management team

Regular integration events and trips

MySii app

Comfortable and well-equipped offices

Job summary

Sii Poland in Kraków is seeking an experienced Infrastructure Migration Engineer to support a VMware migration program, moving virtual machines from legacy ESXi/vSphere to VMware Cloud Foundation 9.1 workload domains. You will work with HCX vMotion and NSX-T components, ensuring validation and cutover readiness.

The role involves planning migrations, grouping workloads, coordinating with network and storage teams, and producing detailed migration documentation to share lessons learned and risk

Qualifications

• 5+ years of experience with VMware platform environments and migration know-how.
• Proven experience migrating production VMs across multi-cluster environments.
• Strong understanding of VMware vSphere, vCenter, ESXi, HCX, NSX-T.

Responsibilities

• Support end-to-end migration of VMs from legacy ESXi/vSphere to VMware Cloud Foundation workload domains.
• Execute migrations using HCX vMotion and validate readiness across components.
• Identify blockers and group workloads into migration waves.
• Support pre-, during-, and post-migration validation and handover.
• Coordinate with NSX-T teams to validate networking and security policies.
• Troubleshoot migration issues across multiple VMware layers.
• Produce migration documentation including trackers and lessons learned.

Skills

VMware vSphere

vCenter

ESXi

HCX

NSX-T

Migration planning

Troubleshooting

English fluency

VMware Cloud Foundation

Storage vMotion

Tools

HCX

VCF

vMotion

Job description

We are looking for 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.

Your tasks

• 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

Job no. JOB-LDCJY

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.

Benefits For You

• Great Place to Work
• Solid financial situation
• Contracts with the biggest brands
• Centre of internal trainings
• Many experts you can learn from
• Open and accessible management team
• Profit sharing
• Passion Sponsorship program
• Regular integration events and trips
• Comfortable and well‑equipped offices
• MySii app
• Medical care