Provide expert consultation services. The DEa intends to award a firm-fixed price sole source purchase order to Dr. Donald Teater, Teater Health Solutions, 9463 E 52nd Ave, Denver, CO 80238 for the purposes of expert witness services. This acquisition is being pursued on a sole source basis in accordance with 13.106-1(b)(1)(i) Only One Source Reasonably Available. The NAICS code for this acquisition is 541690. A determination by the Government not to open the requirement to competition based on the response to this notice is solely within the discretion of the Government.