I like a drone rigger for this concept.
Not to get too much into your background info if you don't want, but how about something like this for a concept. Before running the shadows, maybe you were a doctor/chemist who had a control rig installed to do remote/robot enhanced surgery. Maybe the reason you starting being a shadowrunner had something to do with explosives - dealing with emergency injuries due to an explosion for example. Maybe you began to learn how to deal with explosives to use your drone control skills to remotely and safely defuse bombs. You do have to learn how to make bombs to defuse them though.
With high Logic and ranks in First Aid/Medicine and a medkit, you can do some helpful non-magical healing (leave the magical part for someone else or you make a more difficult to put together magical rigger), you can have a drone that can do some damage so you can lend your skills to a fight (it can shoot regular rounds or chemicals/toxins), and can be the go to for the big explosives. Maybe drive if you need to as well.
Definitely read the advanced demolitions in Run and Gun (p. 171-197) for all of the skills, tests, shops/facilities, gear, and actions needed to make, place, and detonate explosives. Unfortunately, there isn't a lot of rules on chemistry that I know of (are there more in Hard Targets for poisons?), but Chrome Flesh p. 191 does have some rules for making customs drugs.