CEOs often ask for my advice on the ideal candidate profile to lead their ongoing customer growth efforts once we’ve completed the key steps to unlocking growth. You would think that after running marketing at two startups through IPO filings that I could easily answer that question. But I’ve struggled to define the ideal profile of a successful startup marketing leader. After many course corrections, I finally believe I have it figured out. But to really understand the ideal profile, it is important to comprehend why the role is so challenging.

Based on anecdotal evidence, I’d guess that 90% of startup marketing leaders don’t work out. This corresponds to the overwhelming majority of startups falling short of expectations of founders and early investors. When a startup falls short of expectations, the startup marketing leader is the first to go. Even those fortunate enough to gain early user traction still face the uphill battle of finding cost effective ways to acquire users at scale. And if they do succeed, then startups are often tempted to hire a “next level marketer” to replace them.

A successful startup marketing leader must be undaunted by these risks and believe they uniquely have what it takes to succeed. That sounds a lot like the profile of most startup founders. So it’s not surprising that the best startup marketers are entrepreneurs at the core. Entrepreneurs are willing to take the risk and are generally tenacious enough to uncover the channels necessary to drive long-term growth.

I came to this conclusion after finding the common thread between myself and the two most effective people I’ve met at uncovering growth channels. One is still CEO of his company but has done more to drive customer adoption with a fraction of his time than most startup marketers do with undivided attention. The other highly effective startup marketer is a founder that transitioned to leading marketing. They share a persistent desire to connect their innovative solutions with the people that really need them. After implementing critical tracking systems and an efficient customer acquisition process, they are now relentless about experimenting with channels until they find things that work.

Contrast this to a typical marketer, who is generally more focused on marketing activities than marketing results. Most of these activities do nothing to move the needle on the business, but make the marketer feel good because they are working hard.

It may be tempting for a startup CEO to read this and think that aggressive targets can steer the marketer in the right direction. I don’t think that will work. Effective marketing leaders will challenge themselves by pushing the boundaries of the startup’s growth potential. The CEO should be a partner in this process rather than setting arbitrary unrealistic goals. If you don’t have confidence in your marketing leader, the founding CEO should micromanage the process by being an active participant in channel brainstorming sessions and challenging the marketer to ensure tests have been implmented to perfection. Once you have created a product that people really want, most of the remaining company risk and upside lies in your ability to aggressively drive customer adoption. This is not something a CEO should abdicate to the marketer until they’ve demonstrated a relentless drive to uncover profitable customer acquisition channels.

The CEO can also facilitate channel discovery by ensuring that the marketing leader gets the tracking systems they need to execute marketing efficiently. Of course the marketer should be able to make a case for why these resources are important.

What about successful startups that had an initial marketing leader with a more traditional background? First, there is nothing wrong with a traditional marketing background if at the core the marketer is entrepreneurial. Second, the marketer does not always deserve credit for strong user growth. Sometimes great products really do market themselves. My experience with Dropbox certainly supports this assertion. Also, I recently spoke to the former VP Marketing at a company that sold for billions and he agreed that his most important growth contribution was not getting in the way of the viral growth engine.

Of course the risk in hiring an entrepreneur to lead your marketing is that they’ll eventually leave to start their own company. Agree that this is an acceptable outcome if they are willing to give you at least a couple years.

Finally, only the marketing leader needs to be entrepreneurial. In my experience, it is not an essential characteristic for the rest of the marketing team.