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Let's be honest: treating sexual issues is far more complex than most trainings prepared us for.
That's because sexual health isn't just about anatomy and desire — it's shaped by the meanings and expectations clients have inherited from their families, cultures, and belief systems.
Without this understanding, we miss opportunities to unlock deeper trust and provide greater precision and meaningful change for our clients.
That's why we're excited to partner with Dr. Sara Nasserzadeh, one of the field's preeminent experts on sexuality, relationships, and intercultural fluency…
…to provide this exclusive online training program that will prepare you to work with any type of sexual issues that show up in your practice.
Dr. Nasserzadeh has been helping individuals and couples overcome sexual health issues for over 20 years (across more than 40 countries). Now she's bringing her expertly designed, interculturally informed approach to you — in an exclusive, start-to-finish training that equips you to confidently assess, diagnose, and treat sexual concerns whenever they arise in practice.
In this exclusive program, you'll experience:
Once you've completed this program, you'll walk away as a Certified Sex Therapy Informed Professional (CSTIP)* — demonstrating your advanced expertise in treating sex and intimacy issues. (Certification fee included with registration; professional eligibility requirements apply.)
Dr. Sara Nasserzadeh has trained therapists throughout the world and has advised governments, UN-affiliated agencies, Fortune 500 companies, leading universities, and professional organizations on sexual health.
Through her decades of cross-cultural clinical experience, she created the Holistic Assessment & Therapies (HAT) model to help clinicians address sexual health issues with confidence, competence, and a holistic perspective on sexuality.
Now is your chance to learn the model for yourself so you can:
This is more than a training — this is your opportunity to work with sexuality with greater purpose, confidence, and effectiveness.
This is the robust online training you need to effectively work with sex and intimacy issues!
Just three easy steps to become a Certified Sex Therapy Informed Professional (CSTIP)!
Step 1: Complete the training and instantly print your certificate of completion.Module 1 | Foundations of the H.A.T. Model
Available 15 April 2026
Discover the transformative potential of a holistic, interculturally informed model that integrates emotional, relational, cultural, sexual, and spiritual dimensions of a person's life to foster lasting sexual well-being.
Module 2 | Redefining Normal: Assessment Tools and Frameworks
Available 22 April 2026
Build skill in holistic sexual assessments using the Bio-Psycho-Social-Legal model and learn how to expand your assessment practices across orientations, genders, and cultural contexts.
Module 3 | Assessment and Diagnosis
Available 29 April 2026
Learn how to apply the H.A.T. Initial Assessment Form and interpret findings through the cultural and contextual lenses that lead to accurate, context-sensitive diagnosis.
Module 4 | Treatment Pathways and Clinical Tools
Available 6 May 2026
Discover today's most effective, evidence-informed, and culturally engaging treatments to address common sexual issues.
Module 5 | Diagnosing Sexual Concerns with Depth
Available 13 May 2026
Develop clinical fluency in diagnosing sexual dysfunctions using ICD and DSM criteria while incorporating real-world complexity and client context.
Module 6 | Genital Practices Around the World
Available 20 May 2026
Explore global genital practices and their psychosocial impacts while learning how cultural rites and embodied traditions shape identity, empowerment, and sexual narratives across diverse client populations.
Module 7 | A validated tool for a 360-degree review of the main dynamics of a coupledom
Available 27 May 2026
Apply the Relationship Panoramic Inventory (RPI) to guide relational assessment and interventions, and discover the Emergent Love Model's roadmap to support evidence-informed couple therapy and case conceptualization.
Module 8 | Treatment and Management
Available 3 June 2026
Integrate evidence-informed treatment strategies and develop management plans for diverse sexual health presentations in individuals and couples.
Bonus Tools for Working with Sex
Available 15 April 2026
Apply some of Dr. Sara Nasserzadeh's most effective, easy-to-use intimacy tools, including:
2 Live consultation calls to get answers to your specific questions
21 April 2026 — 7:00 pm - 8:30 pm BST
2 June 2026 — 7:00 pm - 8:30 pm BST
Certification means you have received the training needed to work with the sensitivities related to topic of sex in your practice.
Having received expert guidance, you'll have the necessary proficiency to work with intimate relationships, plus the framework and interventions to achieve transformative results for your clients.
Get ready to take your therapy to the next level!
Here's how...
In just a few simple steps, you can become an Evergreen Certified Sex Therapy Informed Professional * (CSTIP) starting today:
*Professional and consultation standards, and exam requirements apply.
Learn more at uk.evergreencertifications.com/cstip
We partner with Evergreen Certifications to include certification with some of our products. When you purchase such a product, we may disclose your information to Evergreen Certifications for purposes of providing services directly to you or to contact you regarding relevant offers. Evergreen Certifications is owned by PESI, Inc.
Through your journey, you'll master Sara Nasserzadeh's Holistic Assessment & Therapies (HAT) model framework that's been a game-changer for working with sexual issues in individuals and couples.
This integrative framework for understanding and treating sexual health concerns was designed specifically to help clinicians move beyond reductionist approaches that treat sexuality as only biological, psychological, or relational — and instead understand it as a multidimensional, meaning-driven human experience.
HAT is one of the first global models to integrate culture, religion, and family systems without imposing one dominant worldview.
You'll have access to training content beginning 15 April 2026. With this on-demand course, you'll have time to review all the content and post discussion questions to your colleagues.
Dr. Sara Nasserzadeh, PhD, is a relational psychotherapist, psychosexual therapist, and social psychologist whose work spans more than two decades across over forty countries.
She is a Senior Accredited member and a Registered Supervisor with the College of Sex and Relationship Therapists in the UK (COSRT), and a Certified Sexuality Counselor and Approved Provider with the American Association of Sexuality Educators, Counselors and Therapists (AASECT).
Dr. Nasserzadeh has served on the boards of various professional organizations and scientific committees, including the International Society for the Study of Women's Sexual Health (ISSWSH), the World Association for Sexual Health (WAS), the American Association of Sexuality Educators, Counselors, and Therapists (AASECT), and the California Psychological Association Division VII (CPA). She has advised UN agencies, governments, and Fortune 500 companies, and her work has been featured in major media outlets, including NPR, the BBC, and The New York Times. She has authored various publications and white papers, as well as three books.
She is widely recognized as a trailblazer in relational science and intercultural fluency, honored by peers and esteemed institutions alike, including the British Council for her contributions to social impact; Pfizer Inc. with its Innovation of the Year recognition for her leadership as global chair of the Customer Insights Council; the BBC World Service with Innovation of the Year Award for her groundbreaking program on sexuality education; and AASECT with its Award for Professional Excellence. In 2025, her most recent book — Love by Design: 6 ingredients to build a lifetime of love — received the Clark Vincent Award from the California Association of Marriage and Family Therapists (CAMFT), recognizing literary works that significantly advance the field.
She divides her time between London and Los Angeles, and travels widely. For more information about Dr. Nasserzadeh, please visit www.sara-nasserzadeh.com.
What's Included:
Upon successful completion of the program, you'll also receive
