Such agreements are enforceable in Washington if they are supported by adequate consideration and limited in time, scope and manner. Enforceability cannot be determined from the information you provided. If you are contemplating conduct that violates the agreement, you should meet with an attorney to explore your options. The few hundred dollars spent on a consult could save you thousands if your employer comes after you for a breach of an enforceable agreement.
Answered on Jul 09th, 2013 at 9:03 PM