Propose lightning talk about the Gerrit UX team at Google

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+# Gerrit UX @ Google 
+
+Introducing the UX folks that support the Gerrit team at Google, what we previously and currently work on. Bring your thoughts!
+
+*[Marian Harbach, Google](/speakers.md#mharbach)*
diff --git a/schedule-usa.md b/schedule-usa.md
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 | 14:45 | [Gerrit upgrades, step-by-step](sessions/gerrit-upgrades-step-by-step.md)                    |
 | 15:30 | [Using Zuul CI for the Gerrit Code Review project](sessions/zuul.md)                         |
 | 16:15 | Break & Networking                                                                           |
-| 16:30 | Lightning talks <br/>- [Show me your dashboard - 10'](lightning-talks/show-me-your-dashboards.md)
+| 16:30 | Lightning talks <br/>- [Show me your dashboard - 10'](lightning-talks/show-me-your-dashboards.md) <br/>- [Gerrit UX @ Google - 15'](lightning-talks/google-gerrit-ux.md)
 | 17:30 | End of Day 1                                                                                 |
 | 19:00 | Dinner - Celebrations for Gerrit v3.0                                                        |
 
diff --git a/speakers.md b/speakers.md
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 David is a contributor to Gerrit since 2013 and a maintainer/committer
 since 2016. David has been an open source and free software enthusiast
 for many years and has contribited to a number of open source projects.
+
+### Marian Harbach - Google {#mharbach}
+
+Marian joined Google in 2018 as a UX Researcher looking at internal developer 
+tools. In a previous life, he did academic research on the UX of security and
+privacy in smartphones and the Web. Marian also used to be part of the connected 
+car security team at a large German automaker.
+
+More recently, he is researching code review workflows and hoping to help improving 
+the Gerrit experience.
+