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Our Team

Advanced Recovery Systems’ mission is to develop a collaborative network of behavioral health treatment facilities that provide premium client-centric care and fiscal stability. This successful, balanced growth requires a synergy among a diverse team of professionals.

Team of doctors and nurses with their hands together in a group

Meet Our Executive Team

Our medical, management, and marketing experts collectively focus on promoting a business model that generates success for each organization in ARS’s portfolio. Our growth is determined by the success of our clients. ARS’s executive team has an overwhelming amount of experience dedicated to meeting this goal. Advanced Recovery Systems’ compassion for the patient and expertise in the industry furthers our mission. We see a clear path to advancing the industry as a whole by aligning with behavioral health professionals who share our mission and values. Maximizing the client experience and streamlining the management process has made Advanced Recovery Systems an industry leader and a primary resource for maximizing growth within the behavioral health community.



Mitchell Eisenberg, MD co-founded Sheridan Healthcare in 1994. He has served on the board of directors since inception and as its chairman and CEO from 1994 to November 2012. From November 2012 until November 2013 he served as its executive chairman and then as a director until the completion of the merger of Sheridan into AmSurg in July 2014. During his tenure as chairman and CEO, Dr. Eisenberg was instrumental in their multiple financial…

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Lewis Gold, MD Co-Founded Sheridan Healthcare in 1994 and was Executive Vice Chairman and on the board of directors of Sheridan Healthcare. Dr. Gold served on the board of directors since the company’s inception and was instrumental in their multiple financial transactions, including an IPO in 1995 and four private equity sales since 1994. Dr. Gold was Executive Vice President from 1994 to 1999 while Sheridan Healthcare was publicly…

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As Chief Medical Officer, Dr. Wandler designs and implements proven models of evidence-based therapeutic programming and ensure that each facility is providing exceptional patient care. A national leader in the treatment of substance abuse and eating disorders, a frequent keynote speaker and a highly rated educator, Dr. Wandler brings over 30 years of experience to his new role at ARS….

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Allison Kreiger Walsh is the Vice President of Business Development and Branding at Advanced Recovery Systems. She brings over a decade of experience in the mental health arena to her role. Ms. Walsh spearheads both the marketing and business development departments for ARS and all ARS-owned properties. She manages brand development for the entire organization, negotiates third-party vendor contracts, and ensures all marketing communications.…

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More Executive Staff Members

It’s imperative that veterans who suffer from PTSD and a co-occurring substance use disorder receive treatment for both concurrently. Treatment can be in an inpatient rehab center, outpatient therapy program, or combine a medical and psychological treatment on the person’s own schedule.

Jon Eisenberg, JD, MBA

EVP, Chief Development Officer

Jonathan Eisenberg oversees acquisitions, development and marketing for ARS. Prior to joining ARS in April 2014, Jonathan worked in Credit Suisse’s Mergers and Acquisitions departments across a wide range of industries including healthcare, technology and consumer / retail. Representative transactions included Neiman Marcus’ sale from TPG and Warburg Pincus to Ares Capital for ~$6 billion, Inhibitex’s sale to Bristol Myers Squibb for ~$2.5 billion, Coastal Energy’s sale to CEPSA for ~$2.2 billion and Beam’s sale to Suntory for ~$16 billion.

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Hunter Mefford

Vice President of Marketing

Hunter Mefford oversees marketing for ARS. Prior to joining ARS in September 2015, Hunter worked across a wide variety of industries including education, e-commerce, direct marketing, technology and consumer / retail. Hunter has led marketing departments for organizations ranging from small private equity held brands to national direct marketing and e-commerce retailers. Hunter has built teams of creative, operations, marketing and engineering professionals in pursuit…

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Robert Fishman

Vice President of Admissions

Robert Fishman, Vice President of Admissions, oversees the admissions department for all ARS facilities. Operating a centralized call center for multiple locations, Mr. Fishman strives to maximize program census and ensure a high return on marketing investment. Under his direction, ARS facilities have reached a 97% census within 90 days of opening and continue to maintain a high, consistent daily census.

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Marta Nelson

Chief Nursing Officer

Marta Nelson, RN, is the Chief Nursing Officer for Advanced Recovery Systems and is responsible for maintaining excellence in quality, patient care in each facility across the country. Marta has more than 30 years of experience in nursing and behavioral healthcare, working with patients who struggle with substance abuse, eating disorders and co-occurring disorders.

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Stewart Gold

Chief Legal Officer

Stewart Gold serves as Advanced Recovery Systems’ General Counsel and Chief Legal Officer. He oversees day-to- day management of legal affairs, including Corporate Governance, Human Resources, and Compliance. His responsibilities include spearheading ongoing acquisition activity, managing the implementation of a robust compliance program, working with Company leaders to standardize core processes in the development of a fast-growing organization, and reviewing and negotiating Company-wide contractual agreements.

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Amy Charley

General Counsel

Amy Charley is the General Counsel and Chief Compliance Officer for Advanced Recovery Systems. Ms. Charley graduated from University of Miami School of Law and then went on to clerk on the United States 11 th Circuit Court of Appeals for the Honorable Judge Peter T. Fay. Upon completing her clerkship Ms. Charley became an associate at Holland & Knight where she worked on multi-district litigation for large international clients.

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Laura Clarke

Senior Vice President of Operations

Laura Clarke is the Senior Vice President of Operations for Advanced Recovery Systems. Laura is responsible for overseeing the successful management of each ARS treatment facility and recovery residence, always prioritizing quality patient care, above all else. Laura has more than 30 years of experience in the healthcare industry and has worked with hundreds of medical and clinical providers across the country to maximize efficiency, productivity and satisfaction of clients.

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Wendy Mahle

Vice President of Human Resources

Wendy Mahle is responsible for employee relations, recruiting, benefits, training, compensation, and payroll. Ms. Mahle graduated from The University of Iowa with a MA in Human Resources and received a BS in Psychology from The Ohio State University. She also has held the Senior Profession Human Resources certification for over 15 years. Ms. Mahle has been a Human Resources leader for over 20 years, most recently with OPKO Health where she worked for six years before joining Advanced Recovery Systems.