Hi. I have created this guy recently.
Technician.
Concept was done in zbrush, retopo + UV mapping in Modo, final sculpt in Zbrush, baking in substance designer, texturing in substance painter.
I Used this Substance Painter preset https://gumroad.com/l/apaxR for texturing.
Rendered in Marmoset Toolbag 3.0
You can check out 3d model with textures on sketchfab https://skfb.ly/669F6
Concepting Stage