In the early years of my career, before going into healthcare IT and engineering.
Back in the late 80s, early 90s. I worked for a security company, installing security systems, and for their detective division, installing hidden CCTV cameras at night, which we called Coverts back then.
This is where my interest in working with cameras moved into working on CT imaging equipment. Then, later, DICOM and software development for medical devices.
Early day of building a Spy Book Camera
Early day of building a Spy Plant Camera