Product safety and regulatory compliance engineer. I am an for a firm designing and building large scale zinc-iron redox flow batteries. Large scale means 1.4 megawatts AC power.
In any case, I use LTSpice for my own personal projects and experimenting with my ideas. Occasionally, I'll put together a quick 3 to 4 component model for my work but this is mostly for me. I originally did such modelling with a DOS based program called ECA. Then I tried multisim and micro-cap. LTSpice has a ice set of features and it is my main tool not.