Halff Associates, Inc. Halff Associates, Inc. Search | Advanced Search | New Members | Coupons and Discounts | All Categories Business & Professional Services >> Professional Services >> Engineers - Civil Halff Associates, Inc. 2255 Killearn Center BoulevardSuite 200Tallahassee, FL 32309 | map | directions Katie Patteson (850) 848-9417 | fax: (850) 681-3600 Visit Site Member Since: 1993 If your business isn't here, contact us today to get listed!