First you need to have contacts and relationships with engineers, OSP managers, plant owners, board members, etc. Many times projects are bid but if you have a good reputation, many plant managers will just ask you for a quote. If you consistently do good work, do what you say you will, don’t cut corners, then you are worth a lot to a plant manager. He is busy enough without having to check on your work.
It has been a while since I have worked in Texas, so I don’t know what the current laws are but a good place to find out in any state is the state’s Secretary of State office.
Since you have been an UG sub for 10 years, I assume you already have:
employees,
a good foreman, (since you will now be too busy to physically work because you will now be looking for the next 2-3 jobs ahead)
a BUSINESS insurance agent for W/C & GL, (I would not recommend a home and auto agent or on line insurance)
bookkeeping services, (this can be you)
a CPA
an attorney
a banker
are incorporated or LLC.
If not you need ALL the above.
Good luck!