A doctorate is proof of a special scientific qualification, which is usually provided by a dissertation and an oral examination in the form of a disputation.
At the Department of Civil and Environmental Engineering, you can earn a doctorate in engineering (Dr.-Ing.) or a doctorate in natural sciences (Dr. rer. nat.) in the scientific subjects of civil engineering, environmental engineering or industrial engineering. In individual cases, the doctoral committee decides which degree is awarded.
A doctorate is in any case a major project that consumes lifetime, energy and resources. It makes sense, among other things, if you want to continue working in the field of science and research after graduation.
You may also be approached by a university professor about this prospect and offered a qualifying position. Retention studies also show that graduates with a doctorate earn significantly higher incomes on average.