diff --git a/docs/people/mathias-lenz.md b/docs/people/mathias-lenz.md
index 2094b01..ceeab92 100644
--- a/docs/people/mathias-lenz.md
+++ b/docs/people/mathias-lenz.md
@@ -4,6 +4,23 @@
 
 ## Role
 
+In the following fields Mathias can contribute with expertise:
+
+- Testing (ISTQB certified)
+  - Test automation
+  - Test conception
+  - Test design
+  - Consulting regarding test strategies and tools
+  - Setup of test environments
+  - Agile testing
+  - Manual testing
+  - exploratory testing
+- DevOps
+- Design-Eye
+- Frontend development
+
+And with a hands-on mentality, he can also contribute to other areas or quickly familiarise himself with them in order to get an ongoing project to work.
+
 ## Spoken languages
 
 ## Education & Projects