Unity Technologies is constantly holding various big events all around the world. On November 1-2, 2016 there’s going to be a big event here in Los Angeles, appropriately called Unite Los Angeles. If you want to talk about game production or any other Unity related stuff you can pitch your talk to Unity Unite ‘16 Los Angeles organisers.
If you’re interested in speaking in front of hundreds of people, you should submit abstracts and supporting materials at unitela2016.unityproposals.com. Proposals must be submitted by July 31st at 11:59PM PDT. If selected, speakers will receive free conference admission. Talks are recorded and published throughout the year on www.unity3d.com.