Main Office

1818 H Street, N.W., Washington, D.C. 20433
Phone +1 (202) 473-5977
Fax +1 (202) 522-3313, 522-3228

Media: Please contact Christopher Walsh directly at

If you would like to contact WSP, please fill out the form below.

This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.
2 + 2 =
Solve this simple math problem and enter the result. E.g. for 1+3, enter 4.