Senior Management Team

Our accomplished management team comes from the day-to-day, hands-on experience with patients and physicians in real world situations. We’ve been there and done that when it comes to understanding how to operate more efficiently and boost productivity improving your overall business health.

Been There, Done That

Our seasoned administrators bring to each project a breadth of expertise based on years of experience in the healthcare industry – financial, clinical and operational.

Glenn A. deBrueys, Chief Executive Officer

Glenn deBrueys is one of the founding partners of American SurgiSite Centers, Inc. (ASC), founded in 1987, which has been developing, building and managing out-patient surgery facilities. In 1998, ASC was sold to a public company, Vision Twenty-One, where he served as President of the ambulatory surgery center division. In 2001, Mr. deBrueys purchased the company back which has since expanded opening multiple free-standing surgical facilities in the northeast. Prior to founding American SurgiSite Centers, Glenn served as Regional  Sales Manager for Allergan and was Sales Manager for American V. Mueller, a Division of American Hospital Supply Corporation. Mr. deBrueys is involved in numerous charitable organizations such as New York City Relief, an organization feeding the homeless in NYC and NJ, where he served as chairman, while the founder was on sabbatical. Mr. deBrueys received his Bachelor of Science degree from Gardner-Webb College in NC.

Maria Tietjen, RN, BSN, Executive VP Nursing & Clinical Services

Maria Tietjen has over 35 years of experience in the field of nursing and management in the clinical setting. Ms. Tietjen’s experience extends across direct patient care, administration and sales. Ms. Tietjen is the Executive VP of Nursing and Clinical Services for 9 ASC’s. She is responsible for overseeing all the nursing and clinical managerial aspects, regulatory and compliance, Infection Control and all areas of patient care. In the past, she held the position of charge nurse for the orthopedic department of a 16-room operating suite in northern New Jersey. She directed the nursing staff and was responsible for the equipment, implants and training of the personnel. From 1988 on she has been working in the field of Outpatient Ophthalmic Ambulatory Surgery Centers. Ms. Tietjen has been published in magazines and lectures at ASCRS and AAO meetings.

Glen J. DuMont, Executive Vice President, Chief Strategy & Legal Officer

Glen DuMont has over 30 years of leadership experience in business/functional process management, and corporate and commercial law. Mr. DuMont joined American SurgiSite in 2016, and is responsible for the company’s operations, strategy and business development functions, and legal affairs.
Prior to joining American SurgiSite, Mr. DuMont held various senior management roles for over 21 years at AT&T Capital Corporation, and, most recently, Hewlett-Packard Financial Services Company. His prior experience also includes consulting, financial analysis, and practice at major NY metropolitan area law firms.
Mr. DuMont is a graduate of The Wharton School, University of Pennsylvania, cum laude, and University of Pennsylvania Law School.

Kathryn R. Craig-Klemm, Business Development

Kathryn comes to American Surgisite Centers, Inc., as a healthcare professional with over 25 years of experience in marketing, sales, public relations, advertising, and business development with emphasis on Out-Patient Services and Ambulatory Surgical Center development. As part of the management team at ASC, Kathryn oversees physician recruiting, new business development, sales, marketing, public relations and web site development.  A strong emphasis is placed on physician relations, community events, and special event coordination with a high priority placed on customer service and quality satisfaction. 

Prior to joining American SurgiSite Centers, Craig served as Director of Sales and Marketing at multi-specialty surgical centers located in Sussex and Morris counties, New Jersey.  Her area of expertise is customer service with a hands-on approach. 

Kathryn is an active member of state-wide organizations such as NJAASC and NJ ASC, whose mission is to promote and advance the efforts of the state’s ambulatory surgery centers in the delivery of optimum patient care in a cost effective manner.   Craig received her undergraduate degree from New Mexico State University.


Remembering Lou Sheffler

It is with great sadness that we share with you the news that Lou Sheffler passed away on Sunday, June 14th, 2015 after a courageous battle with cancer.

Lou served as co-founder and COO of ASC with Glenn deBrueys since 1987, providing leadership and support to all affiliated ASCs.

He is greatly missed.