Gregory C Walsh was a tenured professor at the University of Maryland before working at a startup called Cyra Technologies.

Greg currently helps to develop software and hardware dedicated to working with 3D images known as point clouds. His current title is Director of R & D for TLS software at Leica Geosystems. Prior to this, he was the system architect for Leica 3D laser scanners - from the HDS 3000 - ScanStation C 10. He also contributed to the ScanScation P40.

Cyra Technologies developed commercial 3D laser scanning hardware and software from 1993 - 2001, at which time they were acquired by Leica Geosystems. The latter was acquired by Hexagon AB in 2005.

3D laser scanning explained:

https://www.youtube.com/watch?v=dzkyrbh8Bvo

Making HDS Work For You:

https://soundcloud.com/hxgnradio/making-hds-work-for-you

Leica Geosystems 3D laser scanning hardware and software:

http://hds.leica-geosystems.com/en/index.htm