Possibly this guy was a lab-type engineer whom the techs called for in desperation. The clue is the "white coat". Being one who did not normally visit customers the suit-and-tie policy might not apply.
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.