Add Matthias to the maintainers Q&A session

Change-Id: Idebbec746bf63b0355897fcd5e153ef6fae24a3b

sessions/maintainers-qa.md

diff --git a/sessions/maintainers-qa.md b/sessions/maintainers-qa.md
index 96d8bc9..a7b2992 100644
--- a/sessions/maintainers-qa.md
+++ b/sessions/maintainers-qa.md
@@ -8,3 +8,4 @@
 * *[Ben Rohlfs, Google](../speakers.md#brohlfs)*
 * *[Thomas Draebing, SAP](../speakers.md#tdraebing)*
 * *[Patrick Hiesel, Google](../speakers.md#phiesel)*
+* *[Matthias Sohn, SAP](../speakers.md#msohn)*

speakers.md

diff --git a/speakers.md b/speakers.md
index 72f633d..84262da 100644
--- a/speakers.md
+++ b/speakers.md
@@ -134,3 +134,8 @@
 and development of various tools and plugins for Gerrit, such as DevOps
 analytics, multi-site and chronicle-map. Recently, he heroed in on the
 integration of Gerrit with the cloud.
+
+### Matthias Sohn - SAP {#msohn}
+
+Matthias is a long-time Gerrit contributor, maintainer and community manager.
+He leads the Gerrit team at SAP and the JGit and EGit projects at Eclipse.