Few companies sponsor individuals for Licences anymore.
My advice would be to look within your company handbooks for improvement deals that may involve licence studies.
Some companies do have training colleges attached in some way to their production as the required training experience phases. It may be worth your while exploring these companies to get some form of training.
Many individuals do it all on their own! Books are available from many sources including the FAA/CAA (for free) and there are "Distance Learning" colleges that, although it costs, do help.
From your stated background, I would say that you already have much of the technical knowledge and may only need to brush up on the syllabus for the licence of your choice.
Go to:
easa.eu.int
Regulations – Regulations Structure
and download Implementing Rule 2042-2003 (All of it) and look through Part 66.
Study and sit the module exams one at a time, start with an easy one, and slowly plough through it. It’s worth it.
Whichever way you decide to go,
Good Luck