Get equivalency for your Diploma. In Nepal Diploma in Civil Engineering is earned afer school, i.e. 10+3 = 13 years. But in US you can join for Associate Degree after High school that is class Degree = 12+2 = 14 years. You are lacking 1 year. But the course content in Diploma in Civil Engineering is superior than in Associate Degree here........You might get answer for your question by evaluating your credential. Good Luck.