Infrastructure Migration Engineer (f/m/x)

Sii Poland; Toruń; On-site; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Great Place to Work

Centre of internal trainings

Profit sharing

Medical care

Comfortable and well-equipped offices

Job summary

Sii Poland is seeking an experienced Infrastructure Migration Engineer to support a VMware migration program. You will work on migrating virtual machines from legacy ESXi/vSphere to VMware Cloud Foundation 9.1 workload domains, using HCX vMotion and related tooling.

The role involves validation, planning, and coordination with NSX-T teams to ensure smooth migrations and minimal downtime. The position demands hands-on VMware expertise, 5+ years of experience, and fluency in English.

Qualifications

• Minimum 5 years of experience in VMware platform environments, with hands-on experience in VMware vSphere, vCenter Server, and ESXi.
• Proven experience migrating production VMs between VMware environments, ideally multi-cluster/multi-site/multi-tenant.
• Solid understanding of vMotion, Storage vMotion, DRS, HA, resource pools, clusters, datastores, VM hardware versions, VMware Tools, vDS networking, and VMkernel networking.
• Essential VMware Cloud Foundation 9.1 skills, including management and lifecycle concepts.
• Hands-on experience with VMware HCX or VCF workload mobility tooling and deploying HCX components.

Responsibilities

• Support end-to-end migration of virtual machines from legacy VMware environments into VMware Cloud Foundation workload domains.
• Execute migrations using HCX vMotion and best-suited methods per workload.
• Validate source and destination readiness including vCenter, ESXi, storage, network, HCX, NSX-T, DNS, monitoring, and backups.
• Identify migration blockers such as unsupported VM configurations, active snapshots, or high-change-rate disks.
• Group workloads into migration waves based on dependencies, network segments, and business impact.
• Support pre-, during-, and post-migration validation including power-on checks and application validation.
• Collaborate with NSX-T networking teams to validate segments, overlay networking, NAT, and firewall policies.
• Troubleshoot migration issues across vCenter, ESXi, HCX, NSX-T, vMotion, storage, and DNS.
• Produce and maintain migration documentation, trackers, risk/issues, and lessons learned.

Skills

VMware vSphere

vCenter Server

ESXi

HCX

VCF workload mobility tooling

NSX-T

VMware Tools

vMotion

Tools

HCX

VCF

vMotion

Storage vMotion

NSX-T

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