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Engineering consultancy for power systems, automation and embedded systems

Power engineering and digital design from a single source.

I am Benjamin Rähmer, an electrical engineer. With DIGIMATA engineering, I design, calculate and assess electrical installations in critical infrastructure – and develop the embedded electronics that measure, protect and control them.

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10101 analog digital
From measured signal to logic – illustration, created with AI assistance
  • 15+years of hands-on experience in data centre operations and automation
  • 7+years of network studies with DIgSILENT PowerFactory
  • 7+years of designing digital embedded systems and FPGAs
  • gVEFKexperience as an appointed overall responsible electrically skilled person
Services

My portfolio for your critical installations.

Eight services in four stages – from design to expertise. Each stage builds on the one below, and every service is available on its own or as part of an end-to-end project.

04 03 02 01
Illustration, created with AI assistance
01
DesignDesigning installations, building prototypes
02
AnalysisPower system studies, cooling optimisation

CFD simulations

Airflow and thermal simulation, cooling concepts, hot-spot analysis

03
AssessmentIdentifying risks, assessing independently
04
ExpertiseTaking responsibility, passing on knowledge

Training

In-house seminars and hands-on training for up to 12 participants, course materials included

20 kV 400 V G M
Power engineering: single-line diagram of a low-voltage distribution – illustration, created with AI assistance
FPGA
Digital design: logic blocks and a signal path inside an FPGA – illustration, created with AI assistance
Profile

Two disciplines that rarely come together.

I combine electrical power engineering with digital hardware design. I have deepened the first over more than 15 years in data centres – from data centre support technician to technical director. I have taught the second at RheinMain University of Applied Sciences since 2019.

That is where my added value lies: I understand what the installation demands – short-circuit currents, protection schemes, selectivity, operational safety – as well as the hardware that captures and processes measurement signals in real time. No friction between power engineering and electronics development.

  • PowerFactory
  • Selectivity
  • Short-circuit studies
  • DGUV V3
  • VDE 1000-10
  • VHDL
  • FPGA / SoC
  • PYNQ
  • RISC-V

Career

  1. since 08/2025

    Technical Director

    maincubes Holding & Service GmbH

    Responsible for the technical guidelines for electrical and mechanical systems; building up the electrical safety organisation as gVEFK.

  2. since 2019

    Lecturer in digital design and FPGAs

    RheinMain University of Applied Sciences

    Built and runs the FPGA lab; teaches digital design in VHDL.

  3. previously

    Data centre operations and energy data analysis

    including Digital Realty

    Analysed energy data with regression models and physics-based machine learning to forecast capacity demand.

  4. Education

    Master of Engineering

    Master’s thesis: a PYNQ-based FPGA platform for signal processing and sensor integration

    Grade 1.0 (top German grade) · Friedrich Dessauer Foundation award. The bachelor’s thesis on load flow and selectivity analysis was likewise graded 1.0 and received the same award.

Qualifications

  • Experience as an appointed overall responsible electrically skilled person (gVEFK)
  • Qualified for live working
  • DIgSILENT PowerFactory – vendor training, more than 7 years of project work
  • Digital design in VHDL, FPGA and SoC development
  • Development of custom processor cores in VHDL, e.g. based on RISC-V
Available as a freelancer

Project-based and flexible in scope – remote or on site with you.

Working together

How we work together.

  1. 1

    First conversation

    You describe the task, the installation and your timeline – by phone, by email or on site.

  2. 2

    Proposal

    You receive a tailored proposal: at a day rate, or at a fixed price where the scope is clearly defined.

  3. 3

    Delivery

    Calculation, design or development – remote or on site, invoiced according to progress.

  4. 4

    Result

    A traceable report, a sound model or a working prototype – with a hand-over briefing on request.

Contact

Let’s talk about your project.

Give me a short outline of your task – I will get back to you with an initial assessment. I work in German and English.

Benjamin Rähmer relay@digimata.de +49 151 219 344 57 Albert-Schweitzer-Str. 18, 63110 Rodgau, Germany

Services and terms 2026

Day rates, surcharges, volume packages and framework agreements are summarised in a separate overview. I am also happy to prepare a tailored proposal.

Request the overview