As an IT service provider in Hamburg, I plan, modernise and support the IT of small and medium-sized companies, from Microsoft 365 and IT security to network, servers, telephony and automation. On site and remotely.
Franz Korbjuhn
Your contact · self-employed since 2012
Sophos MSP Partner
„Our IT has grown over the years and nobody has the full picture any more.“
First an inventory and documentation, then a clean-up in a fixed order: access, devices, file storage.
„We use Microsoft 365, but nobody ever planned permissions, devices and file storage as a whole.“
Permissions, devices and file storage get one shared plan instead of decisions that piled up over the years.
„We want to know whether we are prepared for a cyber attack, and what we are still missing.“
A security check shows where you stand. What comes out is a prioritised list, not an 80-page report.
„Our Wi-Fi and network work somehow, but not reliably.“
Measuring instead of guessing: a WLAN survey, proper segmentation and hardware that matches the actual load.
„We are changing IT provider or moving offices and want no gap in operations.“
Handover planned, access and data transferred in full, the old contract closed properly. Without a day of downtime.
„We have our own IT team but need extra expertise on specific topics.“
I step in where your team is short on time or specialist knowledge, and hand back afterwards.
„„Our mobile and landline contracts have grown over the years. Nobody has a full view of the terms, the costs and the tariffs any more.““
Every contract in one overview: terms, costs, tariffs. Then cancel, bundle or renegotiate.
„„A lot still runs manually. We want to automate, and to use AI where it genuinely takes work off our hands.““
I look for the routines that actually pay off and start there. AI only where it takes work away.
Describe it in two sentences. You will get an honest assessment.
Cloud, network, servers, security, devices and processes are connected. So I do not just look at the single problem but at the environment behind it, from planning through to day-to-day operation.
Licence advice, migration and a working environment in which identities, devices, email and collaboration fit together, on Windows as much as on macOS.
Ready for the day it happens: a security concept, protected accounts and devices, verified backups and an incident plan.
Network, Wi-Fi, firewall, servers and storage planned, built and documented, including when a site moves or is set up from scratch.
Helpdesk, monitoring, updates and backup checks with agreed response times, from someone who knows your environment.
Automating recurring work and using AI where it delivers a concrete benefit and the handling of data is settled.
Migration, modernisation, provider changes and telephony with a concept, project management and a proper handover.
Cloud phone systems with 3CX, Microsoft Teams or Telekom Cloud PBX, plus mobile, landline and fibre contracts as a partner of Telekom, Vodafone and Telefónica.
Look at the existing environment and the requirements before changing anything.
Agree priorities, effort and sequence. Not every piece of infrastructure needs replacing.
Carrying out the changes myself, ideally without interrupting day-to-day operation, and documented so it can be followed.
Staying on afterwards, if you want it, and developing the environment further.
An engineering firm secures Microsoft 365 with an up-to-date security concept, without slowing staff down day to day.
A specialist medical practice renews its practice IT. Email with built-in protection, new practice software and a stable network, while work carries on.
An agency is changing IT provider, and the office move follows shortly afterwards. No handover, no documentation, a fixed date.
Around 500 checks in twelve areas: what a Microsoft 365 audit covers, which findings come up almost every time, what it does for your licences and why licences and support belong in one pair of hands.
Read→
Business Basic and Business Standard have cost more since 1 July 2026, Business Premium has not. Why the new price only applies from your renewal, what Premium includes for €7.27 more and why the increase is an opportunity to review your licences and switch.
Read→
Why I usually add Hornetsecurity for email protection when clients use Business Standard, how the switch works, and when I recommend Business Premium instead.
Read→Thank you for the excellent collaboration, we look forward to more projects together.
Thanks to the new internal wiki Mr Korbjuhn built for us, colleagues now usually find the answer to questions about standard processes themselves, which noticeably takes the load off the IT department.
It is hard to believe how much time you save once rudimentary Excel skills are developed a bit further. There is plenty to learn, of course, but it is fun and it really pays off.
The training was great! You simply learn far more effectively when it is explained to you personally and that clearly. I am happy to recommend Mr Korbjuhn.
I am Franz Korbjuhn, a self-employed IT consultant and IT service provider based in Hamburg. I work with small and mid-sized companies and with in-house IT teams — from the technical decision through delivery to day-to-day operation.
I do not only advise, I implement the solutions I propose myself. That is why you get a realistic recommendation and not automatically the product with the highest margin.
Your question isn't here? Write to me directly.
Both: on site in Hamburg and remotely. One non-profit with a distributed team, for example, I support entirely remotely.
Small and medium-sized companies, from a small law firm to businesses with more than 150 staff: agencies, law firms, medical practices, planning offices, trades businesses and non-profits. Typically they have 10 to 50 workstations.
Nothing. The first conversation is free and without obligation. Afterwards you get an honest assessment of what is worth doing and what is not.
Usually by the hour or as a monthly flat fee, depending on what we agree. A block of hours is the exception. The record of work done is always there to check.
Yes. I help where your team lacks time or specialist knowledge, and hand back afterwards. Documentation and access stay with you.
Send me a couple of lines about it, or just call. The first conversation is free and without obligation.
