QES has earned the privilege to serve clients in both the public and private sector, and their counsel, in a vast array of land contamination matters.

Clients rely on QES to be responsive to ever-changing project demands, and to provide thoughtful, thorough analyses, defensible findings, and a well-communicated work product. We strive to pay careful attention to detail while bearing in mind the overall “big picture” perspective. We value our clients, and are proud of the amount of repeat business we receive each year.


“In addition to preparing a technically sound work product, Catherine has proven to be an effective negotiator. I have come to rely upon Catherine for technical excellence, a defensible work product, effective communications, and responsiveness. I’ve enjoyed working with her.” Gene Lucero, Partner – Latham & Watkins, LLP

“Catherine is very easy to work with, always prompt and thorough in her communications with my office, and is quite well respected amongst her peers and other counsel in the case. I can wholeheartedly recommend her as an environmental expert for even the most complex and challenging cases.” Eric Francisconi, Partner – Barnes, Crosby, FitzGerald & Zeman, LLP

“I have come to rely on Catherine’s instincts, talent, hard work, and professionalism. I intend to retain Catherine on many more projects as they come in.” Steve O’Neil, Partner – Sheppard Mullin Richter & Hampton, LLP