Pros
They own a significant share of the O&G services market... so they'll survive no matter what they do wrong. Decent benefits. In some ways, a very innovative company.
Cons
Halliburton is, basically, a "neck down" company... as opposed to say Apple as an example of "neck up" company. The real cash cow is from hard, dirty work in the middle of nowhere... muscle, not brains. Each PSL (division if you will) is autonomous and therefore consistency is almost non-existent. Land in the right PSL and you'll have a good job and a pretty good experience... wrong one, and it can be a real drag. Corporate is weak and seems to be a dumping ground for those who couldn't fit in at a PSL. I worked in Corporate and it was pretty hard to stay positive... a LOT of slackers just filling space until they retire and a lot of contractors with no motivation to do anything but make their billable hours last as long as possible. Some of the facilities are just dumps and the location I was posted was nicknamed "Halcatraz" because it resembled a prison in almost every way. Not a real motivator driving in each morning... but nice to see in the rearview. Oh, and beware... the culture is one of "get along at all costs then backstab when the opportunity arises". You can stay forever if you never upset anyone or fail to "fit in"... by, for example, pointing out they are preventing progress.