I am not personally familiar with the company Valerus, while working in Odessa, TX I noticed a few signs on right-of-ways and wondered what type of company they are. As you can see from their website they are an oil and gas compression company based in Houston, TX.
They have quite a few job opportunities available in the Houston, Midland and Three Rivers, TX areas. Along with several other places throughout the US. Just take a peak at their careers section for specific jobs. You can apply for jobs online. Having never heard of this company before I am sorry to say that I do not have any numbers or contacts to give.