Stephen Kuhn is a Systems Engineer at the Jet Propulsion Lab in Pasadena. His job from the end of 2011 has been as the CHIMRA mechanism SE for the Surface Sampling and Science phase of Curiosity's mission. Before that, he worked testing parts of the infrastructure of MSL's Flight Software. He was the activity lead for the scoop and sample processing aspects of Curiosity's Rocknest campaign.
Stephen Kuhn is the CHIMRA and the scoop systems lead on the Curiosity rover. He explains what the team was doing at Rocknest, and why it took so long!