Pros
Lot's of good exposure to various tools and elements of the oil and gas industry as well as industry-grade tools for testing and verification of new products. Big emphasis on DFM (Design For Manufacturing). Your immediate manager/supervisor is probably going to be a pretty chill and cool person to work for. There is still some semblance of small-company culture around (for now).
Cons
Picture with me, if you will, a corporation that acquires small companies in the oil and gas industry, then slowly bleeds them off by infiltrating that once thriving company with senior managers who's personal lives must be so full of anguish and misery that their sole intrinsic drive is to utilize anger, fear, and anxiety as a means to occupy your mental real estate beyond the 40 hour work week. This is precisely what Halliburton has done to Summit. Do not expect to be recognized for your contribution to the company. The shear disdain senior management displays for subordinates is unpleasant at best. Do not expect to be promoted. Moving up requires a Devine act of Providence. As open management-level positions open up, Halliburton typically pulls outside hires or individuals from other subsidiaries furthering their agenda of culture take-over with "yes" men. Because it is oil and gas, layoffs occur at all levels during a downturn (literally NO ONE who is a 'Summit' employee is safe). Annual Raises (called 'Focal Point') are often postponed or completely canceled company-wide. It's not at all uncommon to go 2-1/2 years without seeing any increase in your pay/salary. At the time of this writing, 12 employees have left for better offers in the last 4 months (salaried and hourly). Halliburton refused to counter offer when immediate managers fought to keep the employees (even cases when the employee did not need to see a "full match" of a standing offer).