Oklahoma EC&M, LLC Engineering – Construction – Manufacturing 20012 East 6th Street Tulsa, OK 74108 Internet Fax Number: (214) 540-1198 Web Site: www.oklahoma-ecm.com E-mail Addresses: bpatterson@oklahoma-ecm.com - P.E. Engineering / Design jelkin@oklahoma-ecm.com - CAD / Design mwittman@oklahoma-ecm.com - Sales / Engineering sales@oklahoma-ecm.com - All Sales Inquiries Phone Numbers: Bruce Patterson – P.E. Engineer (918) 633-3143 John Elkin – CAD / Designer (918) 481-4312 Mike Wittman – Sales Engineer (918) 638-2623 Mission Statement Oklahoma EC&M is a multi-disciplined engineering company committed to professionalism in all of its endeavors.  Having worked together for many years, the partners have the ability to interface well with effective communication in order to execute engineering challenges in an efficient and timely manner.  It is our intention to be the most trusted, capable, and reliable firm of its kind in the industry.  Experience in design, installation, and commissioning of systems makes Oklahoma EC&M the best source for completion of high visibility projects that we believe no other firm can match.