Pros
Black & Veatch is a good place for a new engineer (recently out of college) to begin their career. There are literally hundreds and hundreds of very talented engineers that work at the company and you can't find a better place to learn engineering from experts with years of experience.
Cons
I worked at the company for over 10 years in two separate divisions as an engineer, project manager and management consultant. Every year I was told that the company lost money. Give me a break! The partners at the company are notoriously cheap (as a young engineer I was once asked if I could sleep in my rental car to save the on hotel bill - and no, my boss wasn't joking). Later in my tenure at B&V I was assigned marketing areas in North Dakota, Louisiana, western Kansas, and a few other non-adjacent remote territories, but no marketing budget to get there. Needless to say, I didn't expend too much effort to meet sales targets. While at the company I went to school at nights to get my MBA, even though my Department Head left no doubt that he did not approve of my degree choice, choosing to refuse my requests for salary reimbursement (which was a benefit offered by the company). When I left the company, my direct supervisor (a partner) refused to speak to me for three weeks until my last day. I saw sex discrimination (I'm not sure I'd want my daughter working at B&V), poor management, and a lot of empire building while at B&V. If you're young, B&V is probably a good place to start. After you gain your experience, leave to continue your professional education and development, or you will probably look back in 20 years and regret it.