Together at the Top


Doctors, nurses, psychologists, social workers, mental health counselors, CASACs

Our staff is composed of an interdisciplinary team of professionals who will work with you to achieve your goals and maintain your sobriety



Executive Director and Clinical Director



Clinical Supervisor and Consultant


Medical Director

David M. Ockert, PhD is the founder of the Parallax Center. He currently serves as the Executive Director and Clinical Director. Dr. Ockert has developed methodologies for outpatient detoxification and stabilization from all drugs of abuse. 

Barbara Feldmann, LCSW-R, CASAC has worked in the field of addiction treatment since 2006. She was Parallax Center's Clinical Director, from 2010 to 2017, and continues to serve as a Clinical Supervisor and Consultant for Parallax Center, from 2018 to present. 

Alexandra Fingesten, MD has served as the Medical Director for Parallax Center since 2002. She manages and supervises all medical services, including psychiatric and withdrawal treatments.


Senior Counselor

Patricia Sparks, BA, CASAC has been providing services for people with mental health and substance use disorders for over 22 years.  She has been working with Parallax Center since 2000. 


Operations Director

Jane Marin, BS has been working with Parallax Center since 2007. Starting as an entry level biller, she currently serves as the Operations Director, overseeing the general operations of the agency and coordinating administrative departments.  

Employee Spotlight

Stephen Hirsch,
Clinical Coordinator
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Meet Stephen Hirsch! Stephen currently serves as the Clinical Coordinator for the 822 Outpatient Services Program. Stephen rejoined Parallax last year after serving as a graduate school intern in 2017-18, where he worked alongside fellow NYU grad and current colleague Zoë Sheinberg. Stephen became a social worker after a long career in journalism and media, including 12 years as a finance and strategy executive at the New York Times Company. Stephen also has an MBA from Columbia Business School, and a BA from the University of Pennsylvania.


Why Stephen likes working at Parallax:


“Many reasons, but if I had to pick one it would be diversity. At Parallax, we treat people representative of every demographic and socioeconomic group that you will find in a great metropolis like New York. We get to provide access to treatment to people who really need it, and we get to meet a lot of amazing people along the way.”


Something about Stephen:


“I play guitar in rock and roll bands. Music feeds my soul.”

Want to meet our former Employee Spotlight holders? 

Check them out here!


Employee Spotlight: Director of Outreach

Meet Natalie Helpern! She joined our team in 2015 as a graduate intern from New York University’s Silver School of Social Work. Read more about her by clicking below:


Employee Spotlight: Senior Counselor

Meet Patricia Sparks! She has been working with the Parallax Center for over 20 years. Read more about her by clicking below:

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Employee Spotlight: Therapist

Meet Ariel Hurley! She has been working with the Parallax Center for almost 2 years. Read more about her by clicking below:


Employee Spotlight: Nurse

Meet Joe Nebbia! He has been working with the Parallax Center for over 2 years. Read more about him by clicking below:


Employee Spotlight: Clinical Coordinator

Meet Zoë Sheinberg! She has been working with the Parallax Center since 2017. Read more about her by clicking below:


Employee Spotlight: Counselor

Meet Juliet Faber! She has been working with the Parallax Center as counselor. Read more about her by clicking below: