diff --git a/.textlintrc.js b/.textlintrc.js
index e475209..c9cbaf1 100644
--- a/.textlintrc.js
+++ b/.textlintrc.js
@@ -37,4 +37,4 @@ module.exports = {
   filters: {
     comments: true,
   },
-}
\ No newline at end of file
+}
diff --git a/docs/.vuepress/config.js b/docs/.vuepress/config.js
index 4dd3daa..c674db4 100644
--- a/docs/.vuepress/config.js
+++ b/docs/.vuepress/config.js
@@ -50,6 +50,7 @@ module.exports = {
           children: [
             ['/people/ulf-gebhardt', 'Ulf Gebhardt'],
             ['/people/wolfgang-huss', 'Wolfgang Huß'],
+            ['/people/mathias-lenz', 'Mathias Lenz'],
             // ['/random/website', 'Websites using this theme 👌'],
             // ['/random/emoji', 'Emoji 😃'],
             // ['/random/lorem', 'Lorem Ipsum 🌟']
diff --git a/docs/images/portrait/ml-portrait.jpg b/docs/images/portrait/ml-portrait.jpg
new file mode 100644
index 0000000..f3bce98
Binary files /dev/null and b/docs/images/portrait/ml-portrait.jpg differ
diff --git a/docs/index.md b/docs/index.md
index 8e12200..ac426d9 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -27,7 +27,7 @@ Since we constantly try to recruit new members this list is not complete.
 - [Wolfgang Huß](./people/wolfgang-huss.md)
 - Moriz <!--[Moriz](./people/moriz-wahl.md))-->
 - [Ulf Gebhardt](./people/ulf-gebhardt.md)
-- Mahula <!--[Mahula](./people/mathias-.md))-->
+- [Mathias Lenz](./people/mathias-lenz.md)
 - Claus-Peter <!--[Claus-Peter](./people/claus-peter-huebner.md))-->
 - Hardi <!--[Hardi](./people/chrisopher-.md))-->
 - Hannes <!--[Hannes](./people/hannes-heine.md))-->
diff --git a/docs/people/mathias-lenz.md b/docs/people/mathias-lenz.md
new file mode 100644
index 0000000..fef6554
--- /dev/null
+++ b/docs/people/mathias-lenz.md
@@ -0,0 +1,125 @@
+# Mathias 
+
+![Mathias](~@images/portrait/ml-portrait.jpg)
+
+Rooted in DIY crafting and interest in language, patterns, and human connections.
+In school years first self taught steps where made towards computer systems and programming.
+While studying computational linguistics Mathias branched out into different areas of the computer technology realm.  
+His motivation is to spread the knowledge and hands-on possibilities of contemporary tools, reduce scepticism about them, and empower anybody interested to get hold of them and use them to their own benefits.
+And in particular in software <!-- textlint-disable apostrophe --> development's <!-- textlint-enable apostrophe --> facette of quality assurance he found his profession.
+
+
+## Role
+
+In these fields Mathias can contribute with expertise:
+
+- Testing (ISTQB certified)
+  - Test automation
+  - Test conception
+  - Test design
+  - Consulting on test strategies and tools
+  - Setup of test environments
+  - Agile testing
+  - Manual testing
+  - Exploratory testing
+- DevOps
+- Frontend development
+- Design-Eye
+
+And with a hands-on mentality, he can also contribute to other areas and familiarise himself with new approaches and tools to get an idea or project to work.
+
+
+## Expertise & Projects
+
+Based on a degree in computational linguistics, Mathias found interest and contributed to different fields and projects.
+
+- Supporting the [Gradido software project](../projects/gradido.md)
+  - Test automation
+  - Testing concept
+  - Agile testing
+  - Frontend development
+  - Translations
+- Contributing to eHealth projects while working for web agencies
+  - Testing concept
+  - Conception and test planning
+  - Test automation
+  - Agile testing
+  - Manual testing
+  - Exploratory testing
+- Translations for OSS projects
+- Contribution to open source gaming 3D multiplayer engine
+  - Porting from Java to C++ and patching
+  - Setting up and maintaining build systems for Unix operating systems
+  - Patching
+
+
+## Approaches & tools
+
+### Testing approaches
+
+- [Test-driven development](https://en.wikipedia.org/wiki/Test-driven_development)
+- [Behavior-driven development/testing](https://www.bddtesting.com/)
+- Testing by concept and plan
+- Exploratoy testing (based on intuition and experience)
+
+
+### Test automation
+
+- [Robot Framework](https://robotframework.org/)
+- [Playwright](https://playwright.dev/)
+- [Cypress](https://www.cypress.io/)
+- [Selenium](https://www.selenium.dev/)
+- [Appium](https://appium.io/)
+- [RSpec](https://rspec.info/)
+- [Insomnia](https://insomnia.rest/)
+- [Cucumber](https://cucumber.io/) and [Gherkin](https://cucumber.io/docs/gherkin/)
+- [Katalon Studio](https://katalon.com/)
+
+
+### Test management & reporting
+- [Trac](https://trac.edgewall.org/)
+- [TestRail](https://www.gurock.com/testrail/)
+- [Xray](https://www.getxray.app/)
+- [Github Issues](https://docs.github.com/en/issues)
+- [GitLab Test Cases](https://docs.gitlab.com/ee/ci/test_cases/)
+- [Jira bug tracking](https://www.atlassian.com/software/jira/features/bug-tracking)
+
+
+### Frontend development
+
+- [Vue](https://vuejs.org/)
+- [Quasar](https://quasar.dev/)
+
+
+### Programming & markup languages
+
+- [Javascript](https://www.javascript.com/)
+- [Python](https://www.python.org/)
+- [Ruby](https://www.ruby-lang.org/)
+- [C++](https://en.wikipedia.org/wiki/C%2B%2B)
+- [HTML](https://en.wikipedia.org/wiki/HTML)
+- [CSS](https://en.wikipedia.org/wiki/CSS)
+- [LaTex](https://www.latex-project.org/)
+
+
+## Further commitments and interests
+
+Besides computer technology there are commitments and interests in
+
+- Delicious and healthy food and cooking
+- Music - rhythms and lyrics
+- Human connections
+- Literature
+- Time exchange
+- Connecting the dots
+
+
+## Spoken languages
+
+- German (native speaker)
+- English (business fluent)
+
+
+### Profile
+
+[GitHub](https://github.com/mahula)