We also have a policy of ensuring that we have no single point of failure when it comes to technical or institutional knowledge. Our tech work community is really good at ensuring that we keep others in the loop and document everything.
Non-management positions are subject to a union collective agreement. The money is good mind you but there are no raises outside the pay grids.
Also, if you watch closely, there will be professional development opportunities. These usually include some kind of training through your workplace. In addition, there are committees sometimes. These can create connections in the workplace. Being connected makes you more visible and promotable. This includes conference attendance. The objective is to meet people and make your company look good.
There are also programs that offer training. Things like Verizon Skill Forward which gives a year of training for free or if you pay for like administrative certificates. Check to see what your job offers for education credits. How much will they pay for and what will they guarantee if you do the training.
There is also the question of side projects. Some workplaces encourage inventiveness or side projects which show you can do things for the company. There are ways to do things.