CJSun

Selling AI at Google. Backing the atoms.

Head of Business @ Google · AI GTM operator · angel investor in physical AI, neoclouds, and aerospace. 16 years scaling commercial teams. Based in Los Angeles.

Now Leading one of Google's largest mid-market units. Actively writing checks in physical AI & neocloud infra.
40×
Mid-market revenue growth
8→300
Team scaled
100+
Angel investments
9yrs
At Google
About

Operator and investor at the intersection of AI, GTM, and hardware.

9 years at Google building and leading teams that grew LA mid-market from 8 → 300 people and ~40× the revenue. Currently Head of Business for one of Google's largest mid-market units — player-coach selling into CXO rooms, complex multi-year deals, and AI product GTM.

Angel book concentrated in physical AI / robotics, AI infra & compute, aerospace / dual-use, and vertical software with real retention. Thesis: Where the atoms still matter.

For senior GTM / commercial leadership Physical AI, neocloud, AI infra, frontier labs. cj@cjsun.co · LinkedIn
What I'm Backing

Actively writing checks into three shapes of company.

01
Physical AI with defensible data loops
Robotics, dual-use hardware, and embodied systems that get harder to displace as they collect real-world data.
02
Neoclouds with real utilization economics
Compute infrastructure priced against actual load. Chips, edge compute, thermal & photonic bets.
03
Aerospace & vertical AI with a first customer
Dual-use aerospace and vertical software with signed enterprise revenue.
Selected Investments

100+ early-stage checks. A selection, grouped by thesis.

AI Infra & Compute 06
xAI
Frontier labSeries B
Perplexity
Answer engineSeries C
Lambda
GPU cloudDirect
Normal Computing
Thermodynamic computeSeries B
Extropic
Physics-based siliconSeed
Efficient
Flow-state processorsSeries A
Physical AI & Robotics 04
Armada
Edge compute & roboticsSeries A
Neurophos
Metasurface opticsSeries A
Nox Metals
Automated metals factoriesSeed
Path Robotics
Autonomous weldingSeries D
Aerospace & Dual-Use 01
Impulse Space
In-space transportSeries B
Vertical Software 04
micro1
AI talent infrastructureSeed
Wander
Travel OSSeries A
beehiiv
Newsletter platformSeries B
HIFI
Defense financeSeed
See full portfolio →
Career

16 years selling. 9 building the AI GTM motion at Google.

Google 2017 → present · Head of Business ← Sr. Manager ← Manager ← Sr. AE
Head of Business, Mid-Market Sales 2024 — present
  • Full commercial ownership of one of Google's largest mid-market business units; hire and coach 30+ sellers and managers.
  • Player-coach on strategic pursuits while owning GTM strategy, multi-year attainment, forecasting, and coaching systems.
  • Sell and expand AI-powered solutions with VP/CXO buyers; multi-year negotiations and cross-functional AI product GTM.
Senior Manager, Mid-Market Sales 2022 — 2024
  • Front-line GTM for one of the region's largest books; 100%+ quota while scaling AI selling into CXO rooms. Changemaker Manager of the Quarter.
  • Partnered with Product / StratOps on GTM for over a billion dollars in incremental customer revenue, including one of the org's largest single opportunities.
Sr. Account Executive / Sr. Account Strategist 2017 — 2020
  • More than doubled a 60-account portfolio at 45–55% y/y. Top 1% performance; 2× Sales Excellence Platinum.
  • Built a net-new pod for 5 consecutive quarters; helped multiple customers 10× their annual spend.
Marriott International 2010 → 2017 · Director of Sales ← AE ← Area Sales Manager
  • Director of Sales (San Diego): turned around behind-pace properties; 110% of revenue goal in 2016 ($11.5M, +40% y/y).
  • Account Executive (Chicago): 148% of 2014 goal ($5.9M); 2× Ace Achievement.
  • Area Sales Manager (Irvine): President's Circle 2011 (top 7% global); Sales Manager of the Year at 131% of goal.
Writing

Notes on operating, investing, and what actually compounds.

Sep 7, 2026

Where the atoms still matter

Angel investing is a lens into the future. After two years of checks, a pattern has shown up in my own book. My investments keep clustering in a few places: AI infra and compute, physical AI and robotics, aerospace and dual-use hardware, …

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Mar 17, 2026

Talent vs Direction

“The output of any company is the vector sum of the people within it.” - Elon Musk In physics and mathematics, a vector is a quantity that has both magnitude (how much) and direction (where it’s going). When applied to a …

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Sep 24, 2025

Building Portco

Vibe coding portco.dev with Lovable, Grok and Gemini. Portco is a startup portfolio tracking app.

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Off-duty Ex-rank #1 Starcraft 2. Active top 3% Warcraft 3.