I'm Peter Denno. I work in the Engineering Lab at NIST, in the US. I've been involved with 15926 for only the last 6 months, but I've been involved with TC184/SC4 off and on for about 15 years. I was the editor of ISO 10303-14, the long-forgotten Express-X spec. My research interests are in information modeling and validation (I developed the NIST Validator for OMG technology, http://syseng.nist.gov/se-interop. I did something similar for EXPRESS years ago, called Expresso).
I'm looking forward to work with ISO 15926.