About the Company
Jonathan’s Haven is a premier disability provider agency in New Jersey. We assist disabled adults to live their best lives in a comforting and stimulating environment in counties across the state.
About the Founders
Jonathan’s Haven, LLC was founded by William and Gwendolyn Monangai in 2020. Together, they bring a sense of responsibility and a strong desire to make a positive impact in the lives of others.
Gwen serves as our Executive Director and Managing Partner. She brings more than 20 years of award-winning executive sales experience from the pharmaceutical industry, wherein she directed and managed the production of brand materials critical to the overall success of the companies she supported. Her primary areas of focus were critical care and cardiology. With a background in nursing, she has cared for adults with traumatic brain injury and patients with dementia. Lastly, she is a Certified Assisted Living Administrator, a Certified Dementia Practitioner, a Licensed Practical Nurse, and has a BA degree in Biology from New Jersey City University.
William serves as our Business Manager, Information Technology, and Quality Assurance Specialist. He has a keen eye for detail and brings 25 years of Computer Science experience as a full-stack developer, writing software for the banking industry and start-ups alike. He has a Master’s Degree in Computer Science from the New York Institute of Technology.
About the Medical Director
Dr. Dorcas Mensah, DNP, FNP-BC, is an exceptionally dynamic, self-motivated, and reliable health care professional with 28 years of progressive nursing experience. She consistently delivers the highest standard of patient-centered care. As an Advanced Family Nurse Practitioner with 9 years of clinical practice, she excels at conducting thorough physical examinations, compiling complex clinical data, and interpreting diagnostic tests to ensure precise identification and assessment of patients’ needs.
Her practice is grounded in extensive bedside experience, advanced graduate education, and an unwavering commitment to evidence-based care. She is renowned for remaining composed and effective under the most high-pressure circumstances and crises, and for communicating seamlessly with diverse populations and collaborating with interdisciplinary teams to manage even the most complex cases. Lastly, she is also a woman of deep faith who believes in the transformative power of prayer and the holistic restoration of body, soul, and spirit.
Dorcas earned her Doctor of Nursing Practice from Rutgers University in December 2025, further solidifying her expertise in clinical leadership, quality improvement, and advanced systems-level thinking.
Contact Us
973-873-8887
Mailing Address:
634 Eagle Rock Ave
P.O. Box 354
West Orange, NJ 07052
Board of Directors
Danielle Guyet Lumby, MS
·Toni Lynn Davis, MHA, CNHA, FACHCA, CNA
Pamela Tah Nyambi, MBA, LMSW
Mesode Sobe Uduaghan, APN, PMHNP
Kodie Tillman – Service Recipient
Kathy E. Monangai, PharmD – Secretary/Non-Voter
About the Clinical RN Supervisor
Mrs. Erica Gonnella joins Jonathan’s Haven as the Clinical Nurse (RN) Supervisor, with a diverse background spanning critical care, pharmaceutical development, and physical therapy. After graduating from Rutgers University, she worked in physical therapy before diving into the world of the pharmaceutical industry, where she spent six years with a growing team focused on clinical trial development. After realizing she still felt a pull to return to patient care, Erica returned to nursing school, completed her BS in Nursing, and then worked in the intensive care unit with the neonatal population. With her broad professional experience, she brings advanced clinical judgment, strong leadership, and a calm, focused approach to high-acuity care, always keeping the client at the center.
About the BCBA
Mr. Chin Hao (Hank) Chang is a Board Certified Behavior Analyst (BCBA) with over 10 years of experience serving individuals diagnosed with autism spectrum disorder and other disabilities. He began his career working as a primary therapist in a school setting and joined Jonathan’s Haven in 2024.
He conducts both direct and indirect assessments of programs. He creates behavior intervention plans and strategies using Applied Behavior Analysis (ABA) and Positive Behavior Support (PBS) methods. Chin Hao’s passion is to spark curiosity in individuals and help them learn skills through everyday activities. He collaborates with other professionals to create the most suitable living situation for each individual.
