Hey OP, in response to....
"There are empty information for Fiber years 1-6 along with ISP. The pay is decent but again, their salary never tops out and if it does it will take 20+ years to reach $34+ in field service and fiber.
I have a lot to think about and I may not even want to stay in this field for 20+ years."
Those "empty years" signify that when the contract was agreed upon, Cablevision preferred those with over 7 years experience in the Cablevision footprint to perform Fiber work. The presumption is you've gained the experience on the field and with OSP (Outside Plant). Of course, you are tested for the position.
When the contract was negotiated at that time, which I believe was in March 2015 (not sure), salaries were negotiated by both parties (Cablevision and the union). The union presented the results to the union members, and they, in turn, approved the contract. The union does NOT decide for you.
Thus, once the contract went into effect if you had 8 years in Cablevision, your yearly salary would be $56,545; if it were 10 years, you'd earn $64,445. So, the current contract isn't a 20+ year contract. I guess that is what was throwing you off. Normally contracts are 2-3 years in length. It can be longer. One never knows. It's what the two sides agree on. But when contracts expire, it's "negotiating time" again.
Do your due diligence with a little research. Find out if want a union involved or not.
Hope this helps.