Mr. Middlebrook is a Southern California Super Lawyer, is AV Rated (highest rating available by Martindale Hubbel) and has a perfect 10 rating on . He is considered the preeminent DUI attorney in the Southern San Joaquin Valley.

He spends hundreds of hours a year attending, moderating and lecturing in seminars. He exclusively represents persons accused of driving under the influence of alcohol and drugs and the forensic science associated with those areas.

He is a Founding Member of the DUI Defense Lawyers Association and currently sits on their Board of Directors.  He is a Sustaining Member of the National College for DUI Defense.

He is a graduate of multiple summer sessions of the National College of DUI Defense held at Harvard University in Cambridge, Massachusetts and Winter Sessions held worldwide. He is trained as an Instructor in the administration of Standardized Field Sobriety Testing through the National Highway Traffic Safety Administration and is a regular attendee at Mastering Scientific Evidence Seminars. He is an full member of the American Academy of Forensic Science and the American Chemical Society.

He is one of only six lawyers in the State of California and less than 50 worldwide to be designated by the American Chemical Society as a Lawyer-Scientist. The ACS-CHAL Forensic Lawyer-Scientist is one who uses validated and legitimate science for the benefit of justice. These are lawyers who study the science and apply it legitimately in the courtroom. They expose invalid or non-validated science and use valid science in the courtroom. They eschew the smoke and mirrors techniques of old and embrace the science for the benefit of all.

He has tried over 230 DUI cases throughout his career with a 97% success rate. He has acted as lead counsel in over six thousand administrative hearings, writ proceedings, motions, and appeals. His success rate in those proceedings is unmatched anywhere in the Southern San Joaquin Valley.