Dataport AöR · June 2015 — December 2025
Senior System Engineer
I supported business-critical specialist applications and took migrations through test, change and go-live into data-centre operations.
Infrastructure Operations · Freelance Senior System Engineer
Enterprise infrastructure, migration and stable operations
Business-critical applications do not forgive isolated changes. Platform, database, interfaces and owners belong on one map before the change starts.
For IT leaders, recruiters and project agencies · Germany and DACH
By Rizwan KhanTechnically reviewed: 1 Aug 2026
What it means in practice.
I support complex infrastructure and application contexts from technical assessment through change and migration to handover into operations. Dependencies between Windows Server, virtualisation, middleware, databases and connected services are made visible before changes affect live applications.
In long-running enterprise engagements I combine technical depth with coordination between customers, vendors and internal IT units. Confidential applications stay anonymised; only confirmed areas of responsibility and deliverables are described publicly.
- Operating and developing business-critical applications
- Data-centre and platform migration
- Windows Server, VMware, Hyper-V and Citrix
- Middleware and database dependencies
- Change, incident and go-live coordination
When support makes sense.
- Business-critical platforms need to be migrated or stabilised
- Dependencies between infrastructure, application and operations are not transparent
- Pilot, cutover, go-live or technical handover need senior ownership
Concrete deliverables.
- Technical assessment and a visible dependency map
- Pilot, cutover and fallback planning
- Coordination of technical stakeholders and a documented operational handover
Matching project evidence
Overland Storage / V3 / Sphere 3D / Tandberg Data · May 2014 — June 2015
Senior System Engineer
I coordinated the technical EMEA integration of several sites into a new global corporate environment.
Klett Verlag · October 2013 — May 2014
Senior System Engineer
I combined building an SCCM platform with the subsequent modernisation of Active Directory, file services and Exchange.
Fondsbörse Zweitmarkt Hamburg · December 2008 — February 2009
Virtualisation Consultant
I evaluated VMware and Hyper-V and planned virtualisation building blocks including network, storage, backup and recovery.
Otto GmbH & Co. KG · January 2012 — February 2012
Database Administrator
I supported Oracle administrators with troubleshooting, configuration and performance work on SQL Server 2008.
Hamburg Süd · January 2011 — April 2011
System Engineer
I handled SharePoint, SQL and PKI tasks as separate technical workstreams within the same engagement.
Frequently asked questions from projects.
Which phases belong to a dependable infrastructure migration?
Assessment, target design, dependency analysis, pilot, cutover and fallback planning, technical implementation and a documented handover into operations.
Can the support be project-based or close to operations?
Yes. The scope can cover assessment, migration, stabilisation, go-live support or operational handover.
Confidentiality boundary: only confirmed areas of responsibility and abstracted approaches appear publicly. Client-specific architecture details remain unpublished.
Discuss your project context in confidence.
A short description of the starting point, goal and timeframe is enough for a first technical conversation.