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About Dr. Sean Sullivan
Sean Sullivan, PsyD, is a licensed clinical psychologist, writer, and the creator of The Presence Shift®.
For more than two decades, he has worked with college students, founders, executives, and individuals navigating anxiety, grief, identity change, and major life transitions. Across that work, one question has remained central: how do people leave one state, role, task, or relationship and enter the next with more presence, integrity, and trust?
He began studying psychology and mindfulness as an undergraduate at Harvard University and later completed training in Mindfulness-Based Stress Reduction at the Center for Mindfulness in Medicine, Health Care, and Society at the University of Massachusetts Medical School, founded by Jon Kabat-Zinn, PhD.
Dr. Sullivan completed his clinical psychology residency at the University of Texas Health Science Center at San Antonio and postdoctoral training in health psychology based at the University of California, San Francisco (UCSF).
For more than two decades, he has worked with college students, founders, executives, and individuals navigating anxiety, grief, identity change, and major life transitions. Across that work, one question has remained central: how do people leave one state, role, task, or relationship and enter the next with more presence, integrity, and trust?
He began studying psychology and mindfulness as an undergraduate at Harvard University and later completed training in Mindfulness-Based Stress Reduction at the Center for Mindfulness in Medicine, Health Care, and Society at the University of Massachusetts Medical School, founded by Jon Kabat-Zinn, PhD.
Dr. Sullivan completed his clinical psychology residency at the University of Texas Health Science Center at San Antonio and postdoctoral training in health psychology based at the University of California, San Francisco (UCSF).
In addition to psychotherapy, Dr. Sullivan writes and builds non-clinical work focused on presence, transitions, endings, and trustworthy boundaries in human and AI systems. That broader body of work currently includes:
- The Year of Presence
- The Presence Shift app®
- Presence Shift Termination Standard (PSTS)
- Selected non-clinical advisory and systems work (see below)
Selected books and projects
Current advisory work spans three connected, non-clinical lanes
- The End of the Session (2026)
- Presence Shift in 3D (2024)
- One Perfect Shift (2021)
- U.S. Patent #US11646110B2 — A system and method for improving the emotional mindset of the user using artificial intelligence (2023)
- Virtual Reality for Psychology (2019)
- Be Your Purpose (2014)
- The Mind Master's Silent Journey (2011)
Current advisory work spans three connected, non-clinical lanes
- Present Shift® / Presence Shift® practice — helping people leave one task, role, or state and enter the next with more presence
- Advisory and systems work — helping organizations think about trustworthy boundaries, transitions, and relational AI design
- PSTS — a governance-layer initiative focused on making owner-defined stop boundaries operationally final and reviewable in serious systems
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For research, advisory, partnership, or systems-related inquiries, visit the Research, advisory, and systems work page or email help@oneperfect.com.