Yes, definitely. About 40% of entering Wagner students are "part-time" students, working full- or part-time while attending Wagner. These numbers actually go up during a student's time at Wagner, with many students finding jobs (often through help from career services, Wagner alumni, or faculty), and changing from full-time student status to part-time.
For required classes at Wagner, there are evening classes offered every semester. Most events at NYU Wagner are in the evening, with some also offered as breakfast or lunch sessions.
Of course, part-time students take longer to complete the program, typically taking 3-4 years (as opposed to 2 years for a full time student).
To learn more about whether full- or part-time study makes sense for you, come to an NYU Wagner Open House where you can learn more about the program and talk to current students about how they have negotiated being a student and working at the same time – click here for a schedule of upcoming Open Houses.