Erin Cassidy joined Nexus Health Systems in 2008 and is currently the President. Prior to assuming her current role, she held various roles at Nexus Specialty Hospital including CEO and Administrator, Operations Specialist, and Assistant Administrator. She began her career at Nexus as a Marketing Liaison. Prior to joining Nexus, Ms. Cassidy held several leadership positions in medical doctor practice management in Sydney, Australia.

Ms. Cassidy holds a Bachelor of Arts in Sociology and Anthropology from Smith College and a Certificate in Culture Health Sciences from the Five College Consortium. In addition, she holds a Masters in Nursing from the University of Sydney, and a MBA with a concentration in Health Care Management from Rice University.

Dr. John W. Cassidy is certified by the American Board of Psychiatry and Neurology and has over 30 years of experience in clinical neuroscience and neurobehavioral rehabilitation programs. Currently operating as CEO and Chief Medical Officer of Nexus Health Systems – which he founded in 1992 – Dr. Cassidy was previously the Psychiatrist in Charge and Co-Founder of the Neuropsychiatry Program at McLean Hospital; Chief Medical Officer and Founder of the Neurobehavioral Institute of Houston; Director and Founder of the Neuropsychiatry Subspecialty Services of Del Oro Rehabilitation Hospital; and Medical Director of Neurobehavioral Programs at Cypress Creek Hospital.

Devoting his career to improving the understanding and treatment of individuals with acquired and traumatic brain injuries, Dr. Cassidy continues to help patients return to productive and meaningful lives through a neurospecialty continuum of care. His comprehensive rehabilitative approach delivers more than traditional therapies, addressing a person’s interpersonal, behavioral, cognitive, physical, and emotional challenges to ensure a more successful rehabilitation journey and clinical outcome.

Dr. Cassidy received his Bachelor of the Arts from Hiram College and Doctor of Medicine from the University of Cincinnati College of Medicine. In addition, he received his post-graduate training at Harvard Medical School. Dr. Cassidy has spoken nationally and internationally about the sequela and management of severe traumatic brain injury and authored three books and a number of papers, book chapters, and editorials.

As the head of the finance department for Nexus Health Systems, Kim Fields oversees the accounting and purchasing divisions, manages internal and external financial reporting and cost containment, and develops performance measures that support Nexus’ strategic direction. For nearly the past five years, Ms. Fields has worked exclusively for Nexus’ finance department. Prior to her time with Nexus, she was a Senior Auditor at Deloitte and was a Financial Analyst for an Austin-based healthcare system. Ms. Field’s extensive background in finance, coupled with her existing knowledge of Nexus Health Systems, proves to be invaluable.

Kevin McAndrews is the VP of Human Resources for Nexus Health Systems. He has a depth of HR management expertise with over 20 years of experience in the bio-instrumentation and healthcare industry. The past 15 +years, Mr. McAndrews held executive leadership roles within the private, private equity, and publicly traded organizations. He joined Nexus Health Systems in June 2015 as the Vice President of Human Resources. In his previous roles Mr. McAndrews oversaw all national and international human resources offices, with offices and HR Staff in over 10 countries. Additionally, under Mr. McAndrews leadership, his past companies have been recognized and received the Wall Street Journal Best Places to Work, The International Spirit at Work Award, Red Cross Platinum Award, and Inc. 5000 Fastest Growing Companies.

Mr. McAndrews holds a Bachelor’s Degree in Sociology & Psychology from Loyola Marymount University in Los Angeles and holds a Master of Science in Human Resources from Golden Gate University in San Francisco. He is a native of Los Angeles and a full-time resident of Houston since 2015.

Propelling Nexus Health Systems’ vision as Chief Operations Officer, Joel Talley works directly with facility administration to create and communicate facility strategy. He oversees new program development and ensures alignment with corporate goals. Mr. Talley joined the Nexus team in 2012 as a member of the Finance Department. Prior to this latest promotion, he was VP of Business Development. Before his tenure at Nexus, Mr. Talley accumulated nearly ten years in the finance and healthcare industries. Between his sales and finance experience, Mr. Talley looks forward to driving growth and ensuring all facilities run efficiently.

Ann De la Rosa is VP of Complex Care for Nexus Health Systems. She graduated from UT Health Science Center in Houston, Texas in 1990 with a Bachelor’s of Science in Nursing, and has been a practicing nurse for 26 years. In 2011, she received certification as a Rehabilitation Nurse. Her tenure includes time as a SICU/PACU staff nurse responsible for patient care and clinical liaison responsible for community outreach and education for case managers and physicians.

Ms. De la Rosa has been with Nexus Health Systems for over 20 years, and has been in a marketing and clinical liaison role for most of that time. She is currently based out of the Nexus Health Systems corporate office as the VP of Business Development and assists all facilities and clinical teams. She is responsible for national outreach, education, and patient evaluations. Ms. De La Rosa also collaborates with insurance companies, worker’s compensation, and the military to provide solutions for complex cases.

Coming Soon

Carrie Lujan has 30+ years of financial services experience, most recently as Senior Vice President and Private Bank Relationship Manager at Trustmark bank in the Greater Houston market. Her areas of focus include healthcare banking, commercial and residential real estate lending, mortgage, financial planning, personal and commercial insurance lines, savings and investments strategies.

Ms. Lujan serves both commercial and household needs, and her strengths include relationship management, credit facilitation, leadership and mentoring. Growing up in a small business family has helped her understand the needs and relate to the passion owners have for their businesses. She brings a sense of ownership, urgency and motivation to the roles she serves.

Ms. Lujan, her husband, and their five children have lived in Texas since 2009, having previously resided in Santa Fe, New Mexico and Kansas prior to that. Their family is active in sports including soccer and basketball, volunteering with local non-profits, and are parishioners of Saints Simon and Jude Catholic Parish.