Behind the List: Why AECOM's revenue soared this year

Environmental engineers wear many hats. They are involved in all things environmental from air quality to wastewater, from transportation to cultural archaeology. They play an important part in helping to get development projects off the ground by doing environmental reports and helping companies comply with government environmental regulations.

On this week’s list, companies are ranked by revenue posted at local offices in 2014. AECOM leapfrogged to the No. 1 spot with revenue of $59.2 up from…