David Nienhaus IT-Dienstleistungen

Services

I advise, plan and look after your IT.

Three focus areas, one principle: IT that fits your business and that you actually understand. Each area starts with what you gain — the technology I explain afterwards.

I earn nothing on your hardware — but I'll gladly advise you on buying it.

You buy devices and licences yourself — wherever it works out cheapest for you. So you are not left guessing, I tell you beforehand exactly what matters: which model fits your plans, which licence you actually need, and where saving money now costs you later. On request you get a concrete shopping list. I bill only for my work — advice, planning, setup, operation. That is why you can trust that a recommendation from me genuinely serves you and not my margin.

01 / Focus area

Secure infrastructure & Zero-Trust access

Main focus

Your team works from anywhere — office, home, on the road — without turning your company network into an open barn door.

A classic VPN works like a master key: whoever is in can reach almost everything. Lose a laptop or have a password cracked, and the whole network is open. The newer approach reverses this — every single access is checked, and only what is needed gets granted.

I set this up for your business, secure the systems involved and separate the network into zones — so a problem in production does not also bring accounting to a standstill.

Technical context

Zero-Trust access (ZTNA)
"Trust no one blindly": every connection is checked individually instead of trusting an entire network wholesale. Takes the place of the classic VPN.
Network segmentation
The network is divided into separate zones so an incident cannot spread unchecked.
System hardening
Switch off everything that isn't needed, apply secure defaults, keep the attack surface small.
Modern access control
Everyone gets exactly the rights they need — and where it makes sense, an extra confirmation from a second device.

02 / Focus area

Managed IT services

Security is not something you set up once and forget. I keep it up day to day so you don't have to think about it.

Most security problems arise not because technology is missing, but because nobody is watching day to day: the same password in five places, the account of the colleague who left a year ago, an anomaly nobody noticed. That is exactly where I come in.

What's included

Password management
A secure vault for your team's credentials — no more sticky notes on monitors and password lists in Excel.
Security monitoring
I keep an eye on what happens in your systems — so anomalies get noticed early, not once something has already happened.
Remote access
Access from outside stays monitored and up to date.

03 / Focus area

IT projects, infrastructure & planning

When something bigger comes up — a move, a new server, a backup that finally works — I see it through from the first look to the handover.

First I build a picture of what you have. Then I plan what fits — independent of any vendor — and implement it. At the end you get documentation someone else could work from. You should not be dependent on me.

Typical process

Taking stock
What is there, what runs well, where is a time bomb ticking? The basis for everything else.
Network, servers & virtualisation
An infrastructure that fits your size — stable and manageable, not oversized.
Backup & disaster preparedness
A backup that actually restores when it matters — we test that, not just once on paper.
Documentation & handover
Records you will still understand in two years, plus a briefing at the end.

Is this a fit for your business?

Let's talk it through briefly.

In a first conversation we look at where you stand and what would make the biggest difference for you.