Rob Hirschfeld has been involved in OpenStack since the earliest days with a focus on ops and building the infrastructure that powers cloud and storage.
He's also co-Chair of the Kubernetes Cluster Ops SIG and a four term OpenStack board member. The RackN team has deep knowledge of Kubernetes (we've been deploying it on clouds and metal), OpenStack (we created the Crowbar project) and cloud native architecture (we migrated Digital Rebar to be micro-services).
Basically, Rob has deep ops knowledge of both platforms AND experience with cloud native migrations. He's also a regular speaker at OpenStack Summits about items including SDN, interop and running Kubernetes.
You can read more about my thoughts and positions regarding OpenStack and Cloud on my blog: http://RobHirschfeld.com.