If hired by water utilities, civil engineers will design irrigation and sewer systems. They will also develop new methods to remove excess water after storms and floods. These civil engineers must also ensure that their water systems do not cause harm to the environment. Civil engineers hired by landfill management companies will design new landfills and monitor their operation. When landfills reach maximum capacity, civil engineers will be tasked with sealing the sites and monitoring gas emissions (Kielmas). Civil engineering is a good career because the average annual salary is $83,540, but there are still other engineering fields that earn more (United States). Petroleum engineers are engineers who design methods for extracting oil and gas from underground (“Engineers”). They currently have the highest average starting salary of $74,240, which can then become $186,520 once sufficient work experience is gained. As current petroleum engineers retire, the demand for them is expected to exceed the number of individuals trained to fill available positions