You should definitely consider the following ways to identify and begin networking with UMD alumni.
Join LinkedIn
Once a member of LinkedIn, search by the University of Maryland and select "Alumni." Here, you can search UMD alumni by six fields - Where they live, Where they work, What they do, What they studied, What they're skilled at, and How you may be connected. Define your search and see the profiles of alumni meeting those search criteria. Using good business etiquette, reach out to selected alumni for a brief informational interview on their career, their employer, etc (never asking for a job!). Doing this can help you to network as you learn more about the world of work opportunities.
Join the Maryland Alumni Association
As a member of the University of Maryland Alumni Association you can connect with other alumni by chapters, by regions; by academic networks; and by affinity and special interest networks. Most of these groups provide online and in person opportunities to connect for educational and social purposes. The Association also has a free, in depth resource, Terrapins Connect, available to its members, providing access to thousands of alumni representing a range of professions and industries. You can connect with them to get career advice, mock interview opportunities, and resume critiques.