Changing careers at 17 years into a job, is it realistic?

After 17 years as a janitorial supervisor I am thinking about moving into a different field. I worked as a janitorial supervisor before this. I have good customer skills and I am comfortable with spreadsheets. Did you take a pay cut?

Keep everything in writing and save the confirmation numbers. It saved me later.

You likely have more transferable skills than you think. Write down what you did, not what the job title said.