Please log into the SFS OPM site for a complete list of agency officials and related contact info. They will not be listed here because they change frequently and they have provided their contact information with the understanding that it would be posted on a secure site that requires a login by a limited number of students.
In terms of placement for jobs and internships, the contacts listed there have not been significantly more helpful than independently found sources. The best method remains to ask other students who have found placement, as they have already found a contact who knows about the program and may be able to give you advice about what the agency is looking for (knowing the buzzwords such as GIG-global information grid can go a long way towards increasing the likelihood of getting hired in the interview process.)
If you find a good contact at an agency, please let us know!