Our Team

Tatiana Blatnik is a social impact entrepreneur and wellness advocate whose work centers on bringing people, institutions, and ideas together to advance mental health, community wellbeing, and purpose-driven innovation, with a strong focus on Greece.

She is co-founder of BlatnikGauer, a boutique advisory firm that builds partnerships and ventures across wellness, cultural sustainability, hospitality, and social impact. Through BlatnikGauer, Tatiana works closely with public institutions, private enterprises, and cultural leaders to align values, design collaboration, and activate initiatives with long-term impact.

In 2021, Tatiana founded Breathe Hellas, a national mental health NGO driving awareness, resilience education, and youth empowerment. In 2024, she led a landmark public-private campaign alongside Olympic athletes, Greece's Ministries of Health and Education, the Hellenic Olympic Committee, and leading philanthropic and private institutions.

Tatiana has worked with hospitality and lifestyle brands to develop and launch wellness concepts and services that integrate ancestral wisdom, mental wellbeing, and experiential design, bridging local culture with modern health practices.

She serves as International Ambassador to The Hellenic Initiative and has led social enterprise initiatives with the Lemon Tree Trust, supporting refugee communities in Iraq through agriculture-based healing and entrepreneurship. She is also co-author of A Taste of Greece, celebrating Greek cuisine, heritage, and contemporary culture.

Tatiana began her career at Diane von Furstenberg, where she worked in marketing strategy and supported women leaders through Vital Voices. Born in Venezuela and educated in Switzerland and the United States, she holds a BA in Sociology from Georgetown University and is based in Athens, Greece.

Rooted in the heritage of Swiss hospitality pioneers and shaped by a solid corporate career in pharmaceutical finance, Stéphanie is a triathlete and mother of three who chose to dedicate her full time and expertise to what she loves most: sports, wellness, and hospitality.

Her corporate background was built through senior pharmaceutical finance roles at Novartis Hellas, where she developed a strong foundation in strategic planning, financial structuring, and operational leadership. This analytical discipline continues to inform her structured, results-driven approach to wellness development.

Her transition from pharmaceuticals into wellness marked the beginning of her work in shaping large-scale, high-impact wellness and fitness initiatives. Over the years, she has played a central role in the conception, structuring, and evolution of major wellness platforms and experiential projects. She has contributed to reshaping wellness concepts for Ma Chérie Wellness stores, Ma Chérie Skin the day spa, and Holmes Place Group, while also leading large-scale initiatives such as the creation and launch of the Be Well Movement, a mass-engagement wellness platform designed to make wellbeing accessible, experiential, and culturally embedded.

As Co-Founder of Blatnik Gauer, Stéphanie approaches every partnership and project with strategic clarity, consistency, and a strong mission-driven mindset. She brings together financial discipline, operational structure, and creative vision to build ventures that are both commercially sound and emotionally resonant.

At the intersection of performance, wellbeing, and hospitality, her work reflects a clear belief: wellness is not a trend, but a culture, one that must be thoughtfully designed, lived, and continuously evolved. Through Blatnik Gauer, she continues to shape meaningful collaborations and forward-thinking concepts that elevate wellness from service offering to lifestyle ecosystem.

With over 20 years of experience across public institutions, international organisations and highly regulated industries, Feni specialises in governance, strategic investments and regulatory compliance. She served at the Greek Ministry of Development, contributing to strategic investment licensing, legislative drafting and cross-border initiatives. In the pharmaceutical sector, she was part of the legal leadership of the Hellenic Association of Pharmaceutical Companies, advising on EU and national pharmaceutical law, ethics and compliance, alongside broader regulatory matters. Earlier in her career, she practised in leading international law firms, advising Greek and international clients on corporate, competition and banking law.

Today, her work is focused on hospitality development and investment projects, where she combines legal structuring, strategic advisory and cross-border coordination in entrepreneurial and growth environments. International by background and outlook —and married into a Swiss partner— Feni works comfortably across cultures and jurisdictions.

Above all, she is a devoted mother and passionate traveller, valuing balance, wellbeing and a grounded, human approach to both life and work.

Dimitrios Mastrogiannis is an engineer, AI strategist and entrepreneur focused on building technology-driven ventures that challenge conventional industries and unlock new ways of working, learning and creating value. His work sits at the intersection of artificial intelligence, product development and organizational transformation.

His journey with artificial intelligence began during his studies at New York University, where early exposure to machine learning and data systems sparked a lasting interest in the transformative potential of intelligent technologies. He later completed a Master of Science in Artificial Intelligence and conducted research exploring how advanced AI systems can be applied to complex real-world environments.

Today, Dimitrios serves as Chief AI Officer at OneDealer, leading the company's artificial intelligence strategy and development while guiding organizations in becoming AI-native through the integration of intelligent technologies.

He develops AI-driven products including kivo.dev. Away from his laptop he can be found on a basketball court, studying a chess board, or somewhere between a mountain slope and a car he shouldn't be driving that fast.