David Markovich

Runner, builder, connector, mental health advocate,
all while trying to make people laugh.

New York, NY

Work Expertise

Slack Consulting

Search Engine Optimization

Conversion Rate Optimization

Community Building

Internal Communication

Free time



Side projects




David Markovich was born and raised in New York City and currently lives in Midtown Manhattan.

David loves people – whether that means connecting them via email or optimizing a website for Google for people to find. He is always striving to help others find what they want, when they want it.

David is a marketing & Slack consultant who has worked with governments, venture capitalists, and dozens of corporations and brands, including Johnson & Johnson, Google, Keybank and Comedy Central.

During his career, David has met countless people he wanted to stay in touch with. As a result, he formed a small Skype group, which quickly grew to 300 members. He subsequently moved the group to the Slack chat platform and built a website. Online Geniuses then grew to become the largest real-time marketing community in the world with over 30,000 vetted members.

While managing Online Geniuses, David combined his community-building expertise with his passion for mental health and, with his best friend, built 18percent, a free chat community for people who need mental health support. Since 2018, 18percent members have exchanged over 2.5 million messages of support. 

The community has been featured in The Washington Post and People Magazine and on Good Morning America, NowThis and Entertainment Tonight.

When he’s not writing in 3rd person he’s browsing Reddit. 

Thanks for reading  👋

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