Indicate the examination title and the last four digits of the applicant's social security number on the face of the check or money order. This guide describes how to apply for jobs using the Career Page web site.The process consists of the following steps: 1. Change your address. 2. Change your phone number. 3. 250 Marcus Boulevard, Hauppauge, New York 11788. Are you able to perform the "essential functions" of the job for which you are applying (with or without reasonable accommodation)?. Submit Online APPLICATION FOR EMPLOYMENT Instructions. Successful applicants must comply with the Suffolk County Water Authority residency requirements.