The Day-One Partner
She was 14 when she decided. Not "I want to be in tech" or "I want to work in finance." Mor Chen wanted Unit 8200 - the IDF's most elite intelligence corps - and she spent a full year grinding through exams and preparation before she earned her place. Most people in venture capital didn't commit to anything that precisely until their mid-twenties. Chen had a head start.
What followed was a career built in a straight line that only looks non-obvious in retrospect. 8200, then computer science and statistics at Tel Aviv University while engineering at VMware. Then Strategy&, where she touched high-stakes deals - including Nvidia's acquisition of Mellanox. Then, before any proper VC role, she ran the 8200 Alumni Association's startup accelerator, putting herself in rooms with the earliest-stage founders in Israel's most talent-dense network. She was doing the job before she had the title.
I'm drawn to founders who are irrationally driven, and will break walls to achieve their vision.
- Mor Chen, Partner at GreylockAccel London came next. Three-plus years, seven investments, and a body of work that included early positions in Cyera (data security), Oasis (identity management), and Finaloop (fintech). The deals were notable. What's less often mentioned is what Chen built alongside them: a global CISO network connecting portfolio companies directly with the security leaders who would become their earliest enterprise champions. Nobody assigned her that project. She saw the gap and filled it.
In January 2025, Greylock announced that Chen was joining as Partner. The announcement used phrases like "passion for startups" and "commitment to excellence" - the sort of language that gets applied to most new hires. What it underplayed was the specificity of what Greylock was actually getting: someone who has been in the Israeli tech ecosystem at every stage, from the IDF's intelligence unit to pre-seed accelerator to seed-and-Series A VC, and who knows the founders, the operators, the CISO buyers, and the Accel portfolio companies that are now shaping enterprise software globally.
During her service in Unit 8200, Chen worked directly with the unit commander who founded the cybersecurity division - the same division credited with producing a disproportionate share of Israel's most successful security founders. It was less a career stepping stone than an education in how world-class security thinking actually develops from first principles. The CISO network she built at Accel years later was the civilian translation of the same instinct: get the smartest people in the room together, before the market catches up.
The Greylock role is, to an unusual degree, a founder bet. Israel is the firm's second most active geography outside Silicon Valley. The portfolio already includes the founders behind Palo Alto Networks, Wiz, and Imperva. Chen's mandate is to find the next cohort - the companies that will define the next decade of cybersecurity and enterprise AI - at the seed stage, when most VCs are still waiting for someone else to go first.
She's working from the Bay Area through 2025, then moving back to Tel Aviv. The geography matters. Greylock's bet is that proximity to founders at the earliest stages - being the person they call before the deck is finished - is the edge. Chen has been doing that her entire career, in one form or another. The title has just caught up with the job.
From 8200 to Sand Hill Road
What She's Actually Looking For
Chen's stated investment criteria is short and pointed: founders who are "irrationally driven" and "will break walls to achieve their vision." That's the filter. It comes from 8200, where the bar wasn't just intelligence or technical skill but a specific kind of will - the ability to operate under constraints and still find a way through.
In practice, her focus at Greylock is early-stage Israeli founders in two spaces: cybersecurity and enterprise AI. Both markets are crowded with tourists. Chen isn't one. She has the CISO network. She has the Israeli founder network through 8200. She has the pattern recognition from the Accel portfolio. She is, in the language of venture, a day-one investor - someone you call before the company has a name.
The Cyera investment at Accel illustrated the approach. Cyera's founders were 8200 alumni. Chen was one too. That shared background isn't just a social connection - it's a shared operating system: how to think about security problems from first principles, how to recruit in a specific talent network, how to move fast inside constrained environments. She wasn't backing a pitch. She was backing people she had context for in ways a London-based generalist couldn't replicate.
At Greylock, the same logic scales. Israel is already the firm's second most active market. The portfolio has produced Palo Alto Networks, Wiz, Imperva. Chen is the bet that the next generation of those companies gets found before Series B - at seed, at the idea stage, in a coffee shop in Tel Aviv before the deck exists.