Curriculum vitae

Twists and turns

My path has not been particularly linear.

I have tried a few different things.

And for that reason alone, I am well placed to help you shape your future.

I am always on the lookout for roles that offer variety as well as continuous development and learning.

If you have such a position, then we are in business, and my commitment and loyalty will be unwavering.

When it comes to systems, I have a good eye for the bigger picture.

But I can also focus on technical or aesthetic details.

And this is precisely where I hone my skills.

This is how I achieve long-term benefits for my clients whilst meeting my own high standards.

Where I feel changes are necessary, I weigh them up carefully. I’m not afraid to let go of what I’ve achieved as lessons learned. With new insights, I try totally new approaches or fix past mistakes.

Professional experience

• Information Security Officer

  Since August 2024

  Serrala Group GmbH

• Security Management Expert

  August 2022–July 2024

  Serrala O2C Solutions GmbH

• Security Engineer

  April 2022–July 2022

  Xempus AG

• Principal Systems Architect

  2018–2022

  Xempus AG (formerly xbAV AG)

• Senior Software Engineer

  2016–2018

  xbAV AG

• Full-Stack Software Engineer

  2013–2016

  Self-employed

• Co-Founder, Managing Director and Liquidator

  2013–2020

  xefas UG (limited liability)

• R&D Software Developer

  2012–2013

  Bethke et al. GmbH

• System and Web Programmer

  2002–2012

  Self-employed

  Clients included: merconic GmbH, sferix GmbH, seen.by GmbH, SPIEGEL Group, Bethke et al. GmbH, GameDuell GmbH, simfy AG, formulor GmbH, jubbr AG, Openair Frauenfeld, Herrenschmiede GmbH

• Working Student, Software Development

  2000–2002

  merconic GmbH

• Student Research Assistant, Software Development

  1997–1998

  University of Siegen

Qualifications

• ISO/IEC 27001:2022 Lead Auditor

  April 2025

  Mastermind Assurance

  View Lead Auditor Certificate

• Certified Information Systems Security Professional (CISSP)

  January 2025

  ISC2

  View CISSP Certificate

• Certificate in Advanced English (CAE), CEFR C1

  2009

  University of Cambridge ESOL Examinations

  View CAE Certificate

Work experience

• Work Experience, Software Development

  2000

  merconic GmbH

• Work Experience, Advertising Production

  1999

  zweizett radio advertising agency

Education

• B.Sc. Computer Science and Digital Media (Online), grade: Excellent (1.2)

  2021

  Brandenburg University of Applied Sciences

  Read my attempt at academic writing*

  *Call it a thesis, dissertation, or whatever you like. Mileage may vary.

• Part-time study: Mathematics (2nd Postgraduate Major)

  2003–2010

  Humboldt-Universität zu Berlin

• Part-time study: Communication Science (Postgraduate)

  2002–2010

  Freie Universität Berlin

• Media Planning, Development and Consulting

  1999–2001

  University of Siegen

• Scholarship

  1997

  German Academic Scholarship Foundation

• Physics

  1996–1999

  University of Siegen

• A levels (Abitur), grade: Excellent (1.0)

  1996

  Heimgarten Ahrensburg School