Diane Tehan, MA, LCMHCS

Director of Strategic Development, Counselor Supervisor, & Licensed Clinical Mental Health Counselor

Diane Tehan moved from the U.S.A. to Thailand with her family in 1991 to work with SIL, a language and community development organization.  Living, working, and raising five children in Thailand has provided many rich and varied international experiences. Diane has been a counselor at Cornerstone since September 2004 and an SIL Global counselor since 2003. Diane loves nature, gardening, many kinds of arts, learning all kinds of things, living in a human body, enjoying close friendships and eating vegetables.


  • MA (Masters of Arts) in Clinical Psychology, 2002 Wheaton College, Wheaton, Illinois, USA
  • BM (Bachelor of Music) in Performance, 1978, University of Kansas , Lawrence , Kansas , USA


  • Licensed Clinical Mental Health Counselor (2003), North Carolina, USA
  • Licensed LCMHC Supervisor (since 2018), North Carolina, USA
  • Licensed Professional Counselor (2021), Michigan, USA

Specialized Training and Experience

  • Grief and Loss
  • Trauma (trained in EMDR)
  • Stress and Transition
  • Multicultural Issues
  • Brain Health and the Gut/Brain connection
  • Body Awareness and Mindfulness
  • Relationship Improvement and Communication Skills (EFT)
  • Human Emotional Development and Expression
  • Attention Deficit Disorders (ADD/ADHD)
  • Personality Typologies (Enneagram, DiSC, MBTI)
  • Counselor Supervision