There is a very specific moment in a startup's life that Tom Hammer knows better than almost anyone. The product is working. The fundraise just closed. The Notion doc that served as the employee handbook is now embarrassingly inadequate. The team is 12 people and growing by the week. And the founder, who built something from nothing, suddenly has to figure out how to not screw up the human side of it. That's when Tom walks in.
As Partner leading People Practices for a16z speedrun - Andreessen Horowitz's early-stage accelerator that has deployed over $180 million across 150+ startups - Hammer occupies a rare seat in venture capital. He is not a check-writer. He is not a thesis-driver. He is the person who helps founders understand that their biggest competitive advantage is not the code they write. It's the people they choose.
Before landing at a16z, Hammer built his credibility the hard way: in the arena. At Riot Games he built performance and development programs for a globally distributed workforce at one of gaming's most demanding studios. At Bird Rides he led People and Recruiting through one of the more chaotic hypergrowth stories in recent startup memory. And before any of that, he worked as an HRBP and Category Account Manager at Procter & Gamble, the kind of company where process and scale are practically a religion.
What separates Hammer from the typical venture talent advisor is the breadth of that operational background. He's been the person who had to convince a hiring manager that the candidate they fell in love with is wrong for the role. He's been in rooms where the founding team is starting to fracture. He's seen what happens when a company scales headcount faster than it scales management. His advice carries the weight of someone who has done the thing, not just theorized about it.
Hard work on a long enough timeline gets rewarded.
- Tom HammerSpeedrun itself is an unusual product within the a16z ecosystem. It operates as a pre-seed accelerator with investments up to $1M, and it comes bundled with an unusually dense support network: dedicated expertise in finance, talent, go-to-market, marketing, HR, legal, and operations. For early founders, Hammer's People Practices team is often the first time they get rigorous advice on what they're doing wrong with hiring, or perhaps more commonly, what they're about to do wrong.
The Operator-to-Investor Arc
A Caddy Who Never Stopped Reading the Green
Long before Tom Hammer was advising founders on organizational design, he was hauling golf bags around Wynstone Golf Club in Illinois. He started at age 11 - a kid who needed money and found his way onto the course. He caddied for over a decade. It was not a gentle introduction.
The Day One Disaster
Tom's first shift as a caddy ended with him throwing up all over a member's golf bag during a sweltering afternoon. Heat exhaustion. An oversized cart bag. A boy who had not yet learned his limits. The member never noticed. And Tom came back days later to do it all over again. That's the story he tells when people ask him what resilience actually looks like.
What the golf course gave him was something you can't learn in a classroom: comfort in rooms you're not supposed to belong in. By the time he was a senior caddy, most of his loops came from advance bookings - members who had worked with him before and wanted him back. Relationships built through performance. He carries that principle into every founder conversation he has today.
The Cart Incident
At 11, Tom confidently accepted a job to drive a member's golf cart. There was one small problem: he couldn't legally drive. He slammed on the brakes during someone's mid-swing backswing. His cart-driving career ended that afternoon. The story has a different moral when he tells it now - that overconfidence without capability is a liability even when the stakes are low.
He parlayed those summers into Ohio State, where he earned not one but three degrees - a BSBA, an MA, and an MBA. While studying, he served as a recruiter for the varsity football program. Talent evaluation for high-performance athletes is not entirely different from talent evaluation for high-growth startups. The discipline, coachability, and competitive instinct you're looking for are essentially the same.
People as Product: The a16z Speedrun Philosophy
Most accelerators offer a mentor list and a demo day. a16z speedrun offers something closer to an embedded operations team. Hammer's role is to ensure that every speedrun founder - whether they're 19 years old and building their first company, or a repeat founder who still has their Series B scars - gets the same caliber of people strategy advice that a well-funded growth-stage company might pay a Chief People Officer six figures to deliver.
The Speedrun Thesis on Talent
Your first 10 hires shape your company's culture more than any values doc you'll ever write. Get the people right and the strategy can evolve. Get the people wrong and no strategy saves you. Tom Hammer has watched this play out too many times to pretend it's anything else.
The program has reached global scale. In 2025, Hammer helped launch a16z speedrun's Global Founders Program - a specific initiative to bring international startup founders into the fold, offering up to $1M in investment with end-to-end support for visas, housing, banking, and community building in the US. His thinking: great founders exist everywhere. The friction of getting them into the right room is just a problem to be solved.
On Twitter (@tmhammer - yes, with the hammer emoji), he's direct, sometimes wry, and consistently focused on the substance of founder-building. He's not performing thought leadership. He's fielding questions from founders who need actual answers. The tone is operator-to-operator. That's not an accident.
How He Works
The throughline in Hammer's career is an unusually high tolerance for mess. He joined Bird during a period of organizational chaos. He built programs at Riot while the company was navigating the intense pressure of being a global gaming giant under constant scrutiny. He shows up at a16z not as someone who has operated only in ideal conditions - but as someone who has done the work when things were hard. That matters when you're advising founders, because early-stage companies are almost always hard.
He serves on the Board of Directors at Goodwill of the San Francisco Bay - a grounding signal in an industry that can become very insular very fast. It's the kind of commitment that suggests someone who is thinking about more than his own trajectory.
He's based in Seattle, not Silicon Valley. For a firm headquartered in Menlo Park, that geographic independence carries meaning. He is not the person who needs to be in the room to feel important. He is the person who shows up when the room needs him.
Eight Things Worth Knowing
- His Twitter handle is @tmhammer - complete with a hammer emoji in his display name. Commitment to the bit.
- He started caddying at 11 at Wynstone Golf Club in Illinois and did it for over a decade.
- He holds three degrees from Ohio State: BSBA, MA, and MBA. While studying, he moonlighted as a recruiter for the Buckeyes' varsity football team.
- He vomited on a golf member's bag his first day caddying - and came back the next week anyway.
- At 11, he crashed a golf cart mid-swing. His cart-driving career lasted approximately one hole.
- He sits on the Board of Directors for Goodwill of the San Francisco Bay.
- He lives in Seattle while advising startups across the globe for a Menlo Park-based firm. Remote work, before remote work was the move.
- a16z speedrun has now deployed $180M+ to 150+ startups - with Tom's people infrastructure supporting all of them.