You have to go to college for at least four years to get a Bachelor of Science degree in engineering. Depending on what career path interests you, you may want to go to graduate school for two more years for a Master's degree.
Salary surveys indicate that earnings increase throughout the professional careers with higher levels of education. Because engineering is so technical and new technical discoveries are happening every day, most engineers view learning as a lifelong occupation.
Many universities offer degrees in engineering. Accreditation.org includes a searchable database of those schools offering accredited engineering and engineering technology programs.