Team. Support. Joy.

Meet the people who are passionate about the potential that science and technology hold to help people live more joyfully. We’re not here to do the work of our entrepreneurs, but to make their work better.

The Joyful Team

Liron Nunez Weissman CEO
CEO Liron Nunez Weissman

Liron is the CEO at Joy Ventures. Before being named CEO in December 2021, Liron served as Joy's VP Product Development and VP Portfolio Success. Prior to Joy, Liron was the CTO of Beyond Mobility, where he evaluated startups for investment, and built and managed the service offering for the company’s corporate clients.

Before that, Liron headed the CTO office at Consumer Physics, where he was responsible for pushing the envelope of the SCiO device beyond its existing application, as well as expanding target markets. He also led a program at Consumer Physics focused on embedding the SCiO device in the mobile phone. Prior to this role, Liron was part of the founding team of Pearls of Wisdom, where he served as VP Development.

Earlier in his career, Liron led R&D in various disciplines and areas of technology, where he enjoyed rolling up his sleeves and getting his hands dirty in the actual development process as much as possible.

Liron holds a Bachelor of Science in Physics and Mathematics, from the Hebrew University, as part of the Talpiot honors program.

Sources of Joy: Liron spends his free time (not that he has much) in traditional hand tools woodworking and enjoys cooking almost as much as he enjoys eating.

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Ruthi Aladjem Chief Product Strategist
Chief Product Strategist Ruthi Aladjem

Ruthi joined Joy as the Chief Product Strategist in 2022. 

In her previous role, she was an EIR (Entrepreneur in Residence) at Joy, where she explored new product directions in untapped areas of wellbeing. 

Prior to Joy, Ruthi co-founded Knowsome, an EdTech startup that promotes lifelong learning through fully automated, contextual, and personalized learning journeys. Before that, she was the Director of Learning Design at the University of the People, a nonprofit, tuition-free online university, committed to the global advancement and democratization of higher education. 

Ruthi is also a research and teaching fellow at Tel Aviv University. She holds a PhD in Learning Technologies and a BA in Psychology, Sociology and Anthropology, both from Tel Aviv University. 

Sources of Joy: Animals (specifically dogs), movies (the older the better), tech gadgets (#earlyadopter)

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Dori Zimner Investment Associate
Investment Associate Dori Zimner

Dori Zimner

As Investment Associate at Joy Ventures, Dori focuses primarily on Joy Ventures’ startups investment activities.

Dori has over a decade of experience in cross-border business development and financing. Prior to Joy Ventures, Dori spearheaded numerous successful investment and cooperation deals between Israeli startups and foreign corporations at, international investment banking firm, Asia Direct Capital. 

Dori won a Thesis Award for Excellence from Beijing University where he earned his Bachelor of Arts in Economics. 

Sources of Joy: Dori volunteers as an actor in the Beit Ekstein theater initiative, which brings actors and people with disabilities together on stage in effort to provide them with higher quality of life and social inclusion.

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Cilla Zack Academic Program Manager
Academic Program Manager Cilla Zack

Cilla is a social psychologist managing the Joy Academic Grant Program focusing on innovative technologies, interventions and novel approaches in the field of neuro-wellness.

Since 2018, Cilla has also managed her own business, Simple Habits, where she studies and conducts research in social psychology to offer consumer-friendly, science backed tools for wellbeing.  

Cilla holds a Master of Arts in Social Psychology, with a concentration in Judgment and Decision Makin,  from the Interdisciplinary Center Herzliya. She received a Bachelor of Arts in Psychology, Philosophy and the History of Art and Architecture from University of California Santa-Barbara. Recently, she completed her MBSR training and is currently working on her BECK CBT certificate. 

Sources of Joy: Cilla enjoys exploring the application of interdisciplinary scientific insights from the field of neuro-wellness and leads a Lean in circle in Tel Aviv.

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Sabrina Kestenbaum Director of Marketing
Director of Marketing Sabrina Kestenbaum

Sabrina is the Marketing Director at Joy Ventures. She leads Joy’s marketing and communication strategy and ecosystem programs, and works with portfolio companies across key areas to support their growth. 

Before joining Joy Ventures, Sabrina was the Government & Cities Program Manager at SOSA, where she oversaw innovation partnerships with countries and cities such as Australia, Cologne and the Basque Country, and led the business development of the program. Prior to this role, she served as SOSA's Innovation Ecosystem Manager and was responsible for growing SOSA’s presence in the tech ecosystem, overseeing weekly industry events and programming, and working directly with SOSA's 50+ VC clients on their marketing and ecosystem outreach strategy.

Sabrina holds a Bachelor of Arts, cum laude, in Communications and Film & Media Studies, from Northwestern University.

Sources of Joy: Sabrina spends much of her time out of the office chasing her dog Luli on the Tel Aviv beaches, listening and dancing to music (in classes and around the house) and scavenging for sweets.

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Yhonatan Shemesh Research Analyst
Research Analyst Yhonatan Shemesh

As Research Analyst at Joy Ventures, Yhonatan is responsible for maintaining an up-to-date picture of the scientific literature in the neuro-wellness space.

Prior to joining Joy, Yhonatan was employed at the Israel Gerontological Data Center at the Hebrew University of Jerusalem, where he conducted research on the psychological and social predictors of healthy aging, and was involved in producing evidence-based recommendations for policymakers. In 2017, he co-published an academic book on public understanding of economics.

Yhonatan holds a Masters degree in brain and cognitive science, and is currently pursuing a PhD in psychological data science. He has served in several research capacities in the military and in academia.

Sources of Joy: Yhonatan is an avid cook, percussionist, and gardener.

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Shery Noyman Office Manager
Office Manager Shery Noyman

Shery is Joy Ventures’ office manager. In her role, she orchestrates the daily routine of the office, and its varied members and partners both locally and abroad.

Prior to this role, Shery worked as an Administrative Manager at Microsoft and started her career as a teacher.

Shery holds a Bachelor of Education, from Levinsky College of Education.

Sources of Joy: Shery is a proud mother to a sweet baby boy name Tom, and two furry and well-mannered Chow Chows, Mona and Pako. Both of them serve in the  'Cuteness Department' at Joy Ventures. After working hours and on free days, you can find her at theaters or planning the next family weekend.

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