Sergio Martinez-Casillas (he/him)

M.A.
Accepting Clients

Hola! I'm Sergio, and I’m an Associate Professional Clinical Counselor who has been working in the mental health field for over eight years.

Licensed Professional Counselor Associate in California
Supervised by Nicholas K. Bennett, Psy.D.

Services
  • Individual
  • Couples
  • Family
  • Adolescent/Teen
  • Group

About My Clients

My work focuses on helping people navigate anxiety, depression, grief, schizophrenia, and I’m especially passionate about supporting the LGBTQ+ community. I’m also a proud veteran, having served as a military police officer with the California Army National Guard.

My Background and Approach

I use Cognitive Behavioral Therapy (CBT) to help people break out of negative thought patterns, and I’m also certified in grief counseling. I concurrently work at a residential facility where I support families and help them better understand mental health. Fun fact: I speak Spanish, and I’ve also studied kinesiology—so I take a whole-person approach to wellness. My goal is simple: to walk alongside you as you process your emotions, your struggles, and your healing. Taking that first step toward change can be scary, but it's also incredibly powerful—and you don’t have to do it alone. One symbol I always come back to is the semicolon; it represents the choice to keep going when things feel overwhelming. Your story isn’t over, and I’m here to help you keep writing it. Let’s take the next step together.

Techniques I Use

Specialties
Cognitive Behavioral Therapy (CBT) Person-Centered (Rogerian) Trauma Therapy
Other Techniques
  • Culturally Sensitive Therapy
  • Family Therapy
  • Feminist Therapy
  • Mindfulness-Based Cognitive Therapy (MBCT)
  • Relationship Counseling

Issues I Treat

Specialties
Anxiety Depression LGBTQ-Friendly Therapists
Other Issues
  • Anger Issues
  • Anxiety
  • Bipolar
  • Depression
  • Divorce
  • Family Conflict
  • Gender Identity Therapy
  • Grief or Loss
  • LGBTQ-Friendly Therapists
  • Marriage Counseling
  • Men's Issues
  • Personality Disorders
  • Polyamorous and Open Relationships
  • Post Traumatic Stress Disorder (PTSD)
  • Racial Identity
  • Relationship Issues
  • Self-Esteem
  • Sexual Problems
  • Teen Issues
  • Veterans/Military Service
Insurance Plans Accepted
  • Aetna
  • Beacon
  • Cigna
  • County of Ventura
  • Oscar
  • U. S. Behavioral Health Plan
  • ValueOptions
  • Optum
  • Oxford Health Plan
  • United Healthcare
  • UMR
  • Meritain Health
  • Harvard Pilgrim Health
  • Blue Shield of California
  • UnitedHealthcare StudentResources
  • Evernorth
  • UHC Student Resources
  • Cigna/Evernorth
  • UnitedHealthcare
  • UnitedHealthcare Shared Services (UHSS)
  • GEHA - UnitedHealthcare Shared Services (UHSS)
  • UnitedHealthcare Global
  • UnitedHealthCare Exchange Plans (ONEX)
  • Surest
  • Carelon Behavioral Health Plan
  • Optum EAP
I offer online counseling in the following states:

At A Glance

  • Experience: 3 years of practice
  • Languages: English, Español
  • Rate: $150 - 200/session

Reach out to Sergio