About Ascellus Behavioral Health
A comprehensive behavioral health solution designed for workers’ compensation.
Who We Are
Behavioral Health Solutions
Designed to support recovery and informed decision-making.
Ascellus Behavioral Health delivers evidence-based behavioral health interventions that address the full range of challenges in workers’ compensation, from psychosocial factors that impact physical injury recovery to work-related psychological conditions.
Our role is to bring structure to situations where recovery, diagnosis, or next steps are unclear, equipping injured workers with practical strategies to move forward while providing claims professionals with clinically grounded insight and workers’ compensation-ready documentation.
HOW WE WORK
A Structured, Work-Focused
Approach to Care
Designed specifically for the realities of workers’ compensation.
Virtual Behavioral Health
Services are delivered virtually, enabling consistent access to care regardless of location and supporting continuity throughout recovery.
Work-Focused Interventions
Care is centered on functional recovery, using evidence-based strategies that address behavioral health factors impacting engagement, treatment, and return to work.
Early & Appropriate Intervention
Behavioral health factors are identified and addressed at the right time, helping prevent recovery from stalling and avoiding unnecessary escalation.
What Guides our Work
Grounded in Evidence. Focused on Recovery.
Ascellus Behavioral Health is built on a foundation of clinical precision, structured care delivery, and alignment with workers’ compensation.
We emphasize:
- Evidence-based behavioral health interventions
- Functional recovery and return-to-work outcomes
- Consistent clinical reasoning and documentation
- Right-sized care based on clinical need
- A non-stigmatizing, recovery-focused approach
Leadership
Meet Our Leaders
Experience in behavioral health, clinical operations, and workers’ compensation.
Jeff Williams
Chief Financial Officer
Jeff Williams
Chief Financial Officer
Jeff joined Ascellus as Chief Financial Officer in 2025, bringing more than 25 years of experience investing and scaling innovative technology companies. He has spent his career advising companies on improving operations, enhancing go to market capabilities, and scaling development efforts in high growth organizations including many leading Healthcare IT companies.
Prior to Ascellus, Jeff spent 25 years at Spring Lake Equity Partners (formerly Tudor Ventures), where he was a Partner investing in mid-to-late stage venture backed technology companies. During this time, Jeff invested in over 20 companies and served on over 16 boards of directors leading to over 13 successful exits. Beyond his board experience, Jeff has been actively involved in capital raising and mergers and acquisitions with the portfolio companies he has backed. Jeff continues to advise Cognition Corporation, a Spring Lake Equity Partners portfolio company, and acts as an advisor to .406 Ventures on financial strategy and operations.
He holds a BA in History from Yale University and an MBA from the MIT Sloan School of Management and resides in Boston with his family.
Dr. Les Kertay
Chief Medical Officer
Dr. Les Kertay
Chief Medical Officer
Dr. Les Kertay is a board-certified clinical psychologist, strategic leader, industry consultant, and healthcare executive with more than 50 years of experience applying behavioral science principles to a broad range of corporate and clinical settings.
His expertise includes health psychology, disability medicine, workers’ compensation, absence management, return-to-work, and medical-psychiatric comorbidity, with a particular passion for improving workplace mental health. Over the last 25 years, he has published and presented widely in these areas.
Dr. Kertay currently serves as chief medical officer for Ascellus and as a consultant for other companies in disability and workers’ compensation. Prior to Ascellus, he held several prominent roles, including senior vice president of behavioral health for Axiom Medical, chief medical officer for Lincoln Financial, and chief medical officer for Unum.
Dr. Kertay is a fellow of the International Academy of Independent Medical Examiners, co-dean of Work Comp College’s School of Medical Management, and adjunct professor of psychology at the University of Tennessee at Chattanooga.
Dr. Miranda Kofeldt
Vice President, Clinical Operations
Dr. Miranda Kofeldt
Vice President, Clinical Operations
Dr. Miranda Kofeldt is a clinical psychologist and VP of Clinical Product/Services at Ascellus Behavioral Health, serving injured workers with workers’ compensation claims to foster functional improvement, workplace resilience, and reductions in lost time due to physical and mental injury. Areas of clinical expertise include behavioral medicine/health psychology, including recovery from substance use, motivational enhancement & trauma-informed care.
Prior to Ascellus, Dr. Kofeldt worked at the University of Maryland Medical Center as a clinician, consultant, and supervisor for psychology and psychiatry residents. She spent a year as a research assistant professor and assistant director of graduate clinical training at the University of Maryland College Park. She has co-authored peer-reviewed articles published in JOEM related to behavioral health services in the context of workers’ compensation, textbook chapters published by the American Psychiatric Association, and contributed to a monograph for the World Health Organization. Her passion is maximizing wellness and clinical outcomes in the context of complex health systems that still separate physical from mental health, despite all health being ‘one health.’
Clinical Network
A National Network
Built for Workers’ Compensation
Ascellus delivers care through a credentialed panel of psychologists, neuropsychologists, psychiatrists, and LCSWs trained in workers’ compensation.
This network is supported by a clinical infrastructure designed to ensure:
- Consistent evaluation and intervention
- Alignment with jurisdictional and documentation requirements
- Clinical Quality Assurance and oversight
- Predictable workflows and communication
Clinicians are matched based on claim type, clinical need, and level of evaluation required, ensuring the appropriate expertise is applied at each stage of care.
