I'm a software engineer working for the German financial government, primarily dev lead, architect and build management. I love Java, Jakarta EE, Maven, automated testing with JUnit and documentation (yes!).

In my spare time I'm a Maven committer and also one maintainer of the JUnit extension library JUnit Pioneer.

In 2023, I started to speak at conferences, companies and local Java User Groups (JUG) more regularly. Talks are given in German or English. If you are interested in me giving a talk, please reach out to me. In general, I'm not limited to Germany.

• 2025-06-11: "All you need to know about Maven 4" (Haeger Consulting, 🇩🇪 Bonn)
• 2025-08-19: "All you need to know about Maven 4" (JUG Switzerland, 🇨🇭 Zürich)
• 2025-08-20: "All you need to know about Maven 4" (JUG Switzerland, 🇨🇭 Bern)
• 2025-08-21: "All you need to know about Maven 4" (JUG Switzerland, 🇨🇭 St. Gallen)
• 2025-09-16: "Alles was du über Maven 4 wissen musst" (Java Forum Nord Conference, 🇩🇪 Hannover)

• 2025-05-15: "All you need to know about Maven 4" (JCON Europe Conference), 🇩🇪 Cologne) Slides
• 2025-04-24: "All you need to know about Maven 4" (Belgium JUG), 🇧🇪 Liège) Slides
• 2025-04-01: "Maven 4 - Die Zukunft beginnt jetzt", with Karl Heinz Marbaise (Javaland Conference, 🇩🇪 Nürburg)
• 2025-02-20: "Das ist doch behindert! Über Barrieren und Freiheiten" (JUG Darmstadt, 🇩🇪 Darmstadt) Slides

• 2024-12-04: "All you need to know about Maven 4" (JUG Mainz, 🇩🇪 Mainz) Slides
• 2024-11-06: "Das ist doch behindert! Über Barrieren und Freiheiten" (Haeger Consulting, 🇩🇪 Bonn)
• 2024-09-18: "All you need to know about Maven 4" (JUG Paderborn, 🇩🇪 Paderborn) Slides
• 2024-07-17: "All you need to know about Maven 4" (JUG Karlsruhe, 🇩🇪 Karlsruhe) Slides
• 2024-04-10: "All you need to know about Maven 4" (Javaland Conference, 🇩🇪 Nürburg)

• 2023-07-28: "Das ist doch behindert! Über Barrieren und Freiheiten" (JUG Paderborn, 🇩🇪 Paderborn)
• 2023-03-21: "Das ist doch behindert! Über Barrieren und Freiheiten" (Javaland Conference, 🇩🇪 Brühl)
• 2023-03-16: "Das ist doch behindert! Über Barrieren und Freiheiten" (ITZBund, 🇩🇪 Bonn)
• 2023-02-07: "Das ist doch behindert! Über Barrieren und Freiheiten" (JUG Bonn, 🇩🇪 Bonn)

• 2021-03-31: "To Jupiter And Beyond - On An Exploratory Mission With JUnit Pioneer", with Nicolai Parlog and Mihály Verhás (Global Summit for Java Devs 21, online)