About Me
My name is Lena Theodosiou, and I have extensive clinical experience in both primary and secondary mental health care. I earned my Doctorate (PsychD in Counselling Psychology) from Regent’s University London in 2013, a five-year program that combined advanced clinical practice with research and the production of new knowledge. This training enabled me to lead clinical teams, design new therapeutic protocols, deepen my expertise in existential therapy, and engage extensively with mental health policy.
I hold an MSc in Counselling Psychology from the University of East London, which provided me with a strong theoretical and clinical foundation in cognitive-behavioral, person-centered, and psychodynamic therapeutic approaches. Additionally, I completed a Postgraduate Certificate and a Graduate Diploma in Counselling Psychology at City University London and the University of East London, where I received training in counselling skills, mental health theory and practice, as well as quantitative and qualitative research methods.
My academic experiences have been instrumental in both my personal and professional development, equipping me with a critical and contemporary understanding of theoretical and empirical issues in mental health. Through my studies, I developed a deep appreciation for diversity and gained new perspectives on how to approach and collaborate with individuals from varied backgrounds
For 15 years, I have acquired most of my professional experience working in the National Health System (NHS) and community mental health programs in the United Kingdom, in a variety of inpatient and outpatient settings. I have been maintaining a private practice in the center of Thessaloniki for the past five years. I have worked with adults, adolescents, couples, and families on a wide range of issues, including:
- Domestic Violence
- Grief
- Anxiety Disorders
- Autoimmune Conditions
- Depression
- Trauma and Post-Traumatic Stress
- Infertility
- Eating Disorders
- Obesity
- Disability
- Learning Difficulties
- Parenting
- Adoption
- Gambling and Pornography
- Sexual Difficulties
- Identity Issues
- Phobias
- Death Anxiety
- Existential Issues
- Divorce and Relationship Problems
- Psychosis, Bipolar Disorder, and Personality Disorders
Continuous professional and personal development as a mental health practitioner is essential to me. A therapist who does not work on themselves and refine their practice is unlikely to accompany their clients deeply and meaningfully. I therefore commit to always learning, applying, reflecting, evolving, and re-learning.
My Philosophy
My approach is not limited to a single school of thought. My extensive postgraduate and doctoral studies allow me to draw theories and techniques from a variety of psychotherapeutic models, including Existential, Person-Centered, Psychodynamic, Cognitive-Behavioral, and Systemic approaches. My philosophy is that therapy should adapt to the individual, not the other way around. I treat each client as a unique case; even when presenting similar difficulties as not all methods are suitable for everyone. I consider the quality of the therapeutic relationship between client and therapist to be the most important factor in effective therapy, regardless of the techniques used. A strong, collaborative relationship allows for deep exploration and ultimately facilitates meaningful change in the client’s life.
My love and respect for people—and for my work—have guided me to create a safe and inclusive space, where every individual is met with acceptance, regardless of gender identity, sexual orientation, ethnicity, religion, age, or disability. This is not simply politeness, but an active and intentional therapeutic stance that acknowledges how social discrimination and bias profoundly affect mental health.
As a therapist, I never treat a client’s identity as a problem to solve. On the contrary, I affirm, understand, and accept it unconditionally. I recognize that I do not know everything about another person’s culture or experience, and I am always open to listening and learning without making assumptions or perpetuating harmful stereotypes. My experience has taught me that trauma and psychological distress are not solely personal issues—they are often collective and systemic, shaped by factors such as misogyny, racism, and homophobia. I ensure that these biases and social injustices have no place in my practice.