Welcome to my blog about software testing, test strategies, resilience testing and many other things. I am looking forward to having one place for all my blog posts. I have looked back and migrated the most popular and referenced blog posts from my previous blog sites (jlottosen.wordpress.com and leading-testing-activities.ghost.io).
As long as this this a hobby project to me, the posts are free. The site is funded out of pocket not by subscription
I have been blogging since 2012. Over time many blogposts have been featured in leading internal curated newsletters.
About me
I’m located in Aarhus, Denmark, and we are both Scandinavian and EU. Most of my experience comes from 20 years in local IT consulting companies that deliver IT services to large local organizations and companies with an international footprint.
What I experience as a white, middle-aged male here is probably less extreme than in the US and the UK. But we do have our own systemic challenges, underrepresented groups, and minorities. And hidden disabilities have been here all along.
Recent presentations, appearances and workshops
- Presenter at Continuous Testing Meetups 2026 “Leading Testing Activities”
- Presenter at BrowserStack Online meetup 2026 “Understanding the system of quality”
- Presenter at Danish ISTQB conference (DSTB) 2024, “Test management of NIS2 and all the other requirements”
- Presenter at TestCon 2024 “Learning to lead testing activities”
- Podcast guest panelist, Testing Peers 2024, Episode 116 “Single Points of Failure”
- Workshop facilitator at Romanian Testing Conference 2023 “Make a map of your test strategy”
- Presenter at Test Bash Leadership, 2022, “Staff Testing Roles”
- Workshop facilitator for Ministry of Testing 2022, 2021 “Create test strategies based on business needs”
- Presenter at Test Bash Online 2020 “When subject matter experts test”
Credentials
- Ministry of Testing Software Testing Essentials Certificate (STEC), Sep 2025
- ISC2 Certified Secure Software Lifecycle Professional (CSSLP), Apr 2025
- Ministry of Testing Community Certificate, Dec 2024
- APMG Change Management Foundation, Nov 2013
- Aarhus University, Master of Science Computer Science, Jun 2003
- ITIL v3 Intermediate Qualification: Release, Control and Validation, Mar 2011
- ITIL v3 Foundation Certificate, Sep 2010
- ISEB Practitioner certificate in Software Testing, Mar 2007
- ISEB Foundation certificate in Software Testing, Jun 2004
Impressum
The o2sn.dk blog is a personal and independent publication by Jesper Ottosen, 2025.
Creative Commons: Attribution-Non Commercial-No Derivatives 4.0 CC BY-NC-ND 4.0.