Days were rarely typical, often dictated by needs of the project.
Duties varied from Schematic capture and PCB layout,
Generation of Schematic Symbols and PCB Footprints,
Design reviews, Schematic Reviews, PC board Layouts reviews, Circuit debugging. Prototyping, Module assembly and testing. UL/CSA testing, Generation of test procedures and test fixtures,
Many days spent in the office working with CAD tools or Excel, Word and other office tools and training others on their use
Other days were spent in the lab on the bench working with most all typical lab equipment, testing, debugging prototyping or assembling or training others.
including thermal chambers, humidity chambers and halt chambers and various fabrication tools T-tech, Drill press, Mills, Lathes, re-flow ovens to name a few.