Hans-Nikolai Viessmann
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Hans-Nikolai Viessmann Email & Phone Number

System Engineer Scientific Computing at Paul Scherrer Institut PSI
Location: Greater Freiburg Area, Germany 6 work roles 7 schools
1 work email found @psi.ch LinkedIn matched
✓ Verified July 2026 4 data sources Profile completeness 100%

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Current company
Role
System Engineer Scientific Computing
Location
Greater Freiburg Area, Germany
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Who is Hans-Nikolai Viessmann? Overview

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Hans-Nikolai Viessmann is listed as System Engineer Scientific Computing at Paul Scherrer Institut PSI, a with 1232 employees, based in Greater Freiburg Area, Germany. AeroLeads shows a work email signal at psi.ch and a matched LinkedIn profile for Hans-Nikolai Viessmann.

Hans-Nikolai Viessmann previously worked as PHD Candidate at Radboud University Nijmegen and PHD Student at Edinburgh Centre For Robotics. Hans-Nikolai Viessmann holds Doctor Of Philosophy - Phd, Computer Science from Radboud University Nijmegen.

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hviessmann@psi.ch
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Profile bio

About Hans-Nikolai Viessmann

I'm an experienced software engineer and systems administrator (and a computer whisperer). I'm from Germany, but have lived and/or worked in 4 countries, I am fluent in English and German. I enjoy cycling and hiking, am an electronics hobbyist, and enjoy going to the movies. In my spare time, I'm finishing off my PhD thesis, which focuses on compiler technologies.

Listed skills include Programming, Java, Web Development, Software Engineering, and 33 others.

Current workplace

Hans-Nikolai Viessmann's current company

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Paul Scherrer Institut PSI
Paul Scherrer Institut Psi
System Engineer Scientific Computing
aargau, switzerland
Website
Employees
1232
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6 roles

Hans-Nikolai Viessmann work experience

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System Engineer Scientific Computing

Current

Villigen, Aargau, Switzerland

Team member in R&D environment focused on HPC and computing for research initiatives. I am involved in: - Developing next-gen HPC systems based on HPE Cray Shasta (as part of two projects: TransAlps in collaboration with CSCS and SwissTwins in cooperation with the ETH Domain)- Re-vamping existing research applications for a stateless future (built on K8s)- Expanding compute capabilities on-site at PSI

Jul 2022 - Present

Phd Candidate

Nijmegen Area, Netherlands

Switched universities, together with Prof. Sven-Bodo Scholz, joined faculty in 2019. Have been continuing my PhD research since then.Initially my work was being done in collaboration with my alma maters HW and UoE in Scotland, but after 2020 I have been engaged exclusively at Radboud University.

Phd Student

Edinburgh, United Kingdom

I've been working on my PhD in CS, focusing on using compiler-based optimisations and code-generation to automatically orchestrate the memory between host system and GPU devices. I define my programs using a high-level programming language called Single-Assignment C (SaC), which transforms into optimised CUDA code. I have developed several compiler-based optimisations and code transformations that allow me to take this higher language specification, and apply my sophisticated memory reuse techniques and device specific optimisations. My work shows competitive runtime performance when compared to many handwritten example codes.Through this work I have gained a lot of experience with C/C++/Fortran/Python based projects, typically with 100.000s of lines of code. Additionally I am proficient in the use of GNU/Linux and other *unix systems, and am proficient in the use and deployment of enterprise-grade hardware and systems. I have administered a HPC cluster for the duration of my PhD.

Sep 2015 - Aug 2021

Student Internship

Edinburgh, United Kingdom

I worked on a project to optimise a legacy Fortran-based application, called the BGS Global Geomagnetic Model (BGGM). The computational system creates a yearly model of the earth's magnetic field, which is used by the oil&gas industry and others.This project was structured as a research internship, and used to conduct an investigation into the suitability of array programming and code-generation for optimising the BGGM application. I used the Single-Assignment C (SaC) compiler suite for this project, which through the array programming context can generate effective high performance multi-threaded code. After extensive profiling, a specific portion of the application was passed through SaC for optimising. An extensive evaluation of the work showed a performance speedup of over 10%. The work resulted in a publication in 2017 through ACM, see https://dl.acm.org/doi/abs/10.1145/2897336.2897348.

Jul 2014 - Oct 2014

Pc Engineer

Techfix Ltd

Edinburgh, United Kingdom

Working in the role of PC Engineer, I was given the task of configuring a web server for use by websites developed for customers. Learning new skills along the way and working with team members to tackle complications, I now manage the server and deal directly with customers to resolve any technical issues.

Jan 2012 - Sep 2014

Internship

Edinburgh, United Kingdom

As part of my internship I worked in the Managed Services department of the company, dealing with the day to day incidents revolving around Google Apps and products, and AWS. I had to work closely with both my colleagues and the customers to resolve these incidents.

Jun 2013 - Jul 2013
Team & coworkers

Colleagues at Paul Scherrer Institut PSI

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7 education records

Hans-Nikolai Viessmann education

Doctor Of Philosophy - Phd, Robotics And Autonomous Systems

Activities and Societies: Lab Helper/TA: Operating Systems & Concurrency; Distributed & Parallel Programming. Societies: Anime.

Doctor Of Philosophy - Phd, Robotics And Autonomous Systems

Joint-degree between Heriot-Watt University and the University of Edinburgh.

Master Of Science - Ms, Robotics And Autonomous Systems

Joint-degree between Heriot-Watt University and the University of Edinburgh. My thesis looked into performance portability of OpenCL.

Master Of Science - Ms, Robotics And Autonomous Systems

Joint-degree between Heriot-Watt University and the University of Edinburgh. My thesis looked into performance portability of OpenCL.

Bachelor Of Science (Hon.), Computer Science

Activities and Societies: Heriot-Watt Robotics Society, Heriot-Watt Debating SocietyThe course includes a variety of sub-topics.

Ib Diploma, High School/Secondary Diplomas And Certificates

Activities and Societies: Backstage Technician for the Drama Society; Sport Photographer for 2 yearsClasses: Math HL, Economics HL.

FAQ

Frequently asked questions about Hans-Nikolai Viessmann

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What company does Hans-Nikolai Viessmann work for?

Hans-Nikolai Viessmann works for Paul Scherrer Institut PSI.

What is Hans-Nikolai Viessmann's role at Paul Scherrer Institut PSI?

Hans-Nikolai Viessmann is listed as System Engineer Scientific Computing at Paul Scherrer Institut PSI.

What is Hans-Nikolai Viessmann's email address?

AeroLeads has found 1 work email signal at @psi.ch for Hans-Nikolai Viessmann at Paul Scherrer Institut PSI.

Where is Hans-Nikolai Viessmann based?

Hans-Nikolai Viessmann is based in Greater Freiburg Area, Germany while working with Paul Scherrer Institut PSI.

What companies has Hans-Nikolai Viessmann worked for?

Hans-Nikolai Viessmann has worked for Paul Scherrer Institut Psi, Radboud University Nijmegen, Edinburgh Centre For Robotics, British Geological Survey, and Techfix Ltd.

Who are Hans-Nikolai Viessmann's colleagues at Paul Scherrer Institut PSI?

Hans-Nikolai Viessmann's colleagues at Paul Scherrer Institut PSI include Lucas Dobler, Pavel Frajtag, Hans-Frieder Beer, Roger Schibli, and Katharina Liefert.

How can I contact Hans-Nikolai Viessmann?

You can use AeroLeads to view verified contact signals for Hans-Nikolai Viessmann at Paul Scherrer Institut PSI, including work email, phone, and LinkedIn data when available.

What schools did Hans-Nikolai Viessmann attend?

Hans-Nikolai Viessmann holds Doctor Of Philosophy - Phd, Computer Science from Radboud University Nijmegen.

What skills is Hans-Nikolai Viessmann known for?

Hans-Nikolai Viessmann is listed with skills including Programming, Java, Web Development, Software Engineering, C, Php, Git, and Computer Science.

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