2019 was a bumper year for my experience of design engineering. First I had a 2-week Work Experience at CERN in Geneva, with the team working on upgrading the LHCb experiment for the future High Luminosity LHC:

Then I had an excellent placement with Leonardo Helicopters in Yeovil:

Postscript

I agree wholeheardly with author Don Norman, who describes in his excellent classic book, "The Design of Everyday Things", how bad design screams out its inadequacies, making itself very noticeable. An example of one of my pet hates is badly designed LCD digital displays, in which the digits almost completely fill the escutcheon with negligible surrounding area. Here's an example of a digital clock:

Here's an even worse example, carrying the logo of a prestigious company:

Here's an example of a modern Swisscom TV remote controller. Instead of an infrared transmitter, it communicates with the receiver by Bluetooth. So there is no need to lift the controller and point it at the set; one can just press the keys with one finger while it is lying on the table, right? Wrong! The curved profile of the back of the housing means that the controller just rolls over when any of the keys in the outer rows are pressed. Impractical and irritating. Didn't the designer try out a prototype before putting the design into production?

In comparison, Ed Liljenwall's industrial design of the 1972 HP-35 scientific pocket calculator was a masterpiece. The snap-feel over-centre keys give the user all-important unambiguous tactile feedback. Every detail of the design has been meticulously thought out, right down to the non-slip feet that cleverly double as battery-door latches and the chevron sides that make it seem thinner than it is.
From the convenient sculptural wedge shape of the textured case to the human engineering of the elegant keyboard and the bright display, angled for desktop use, the design is both eminently practical and aesthetically pleasing. The user begins to enjoy it before even switching it on:

Liljenwall didn't work in isolation. The fact that he had an outstanding working relationship with the electronics engineers and the manufacturing and tooling specialists resulted in a very successful design.