If you are interested in Civil Service, the Federal Government is always hiring. You can go to USA Jobs (
https://www.usajobs.gov) to search. Just make sure you filter on "Open to the Public". A quick search of just "Engineer" shows 382 jobs open to the public around the county and even some overseas. With your education, I'm thinking the U.S. Army Corps of Engineers could be a good fit. Good Luck!
- Jason