My first piece of advice: Talk to your direct manager about this and make it known that a) you're interested in becoming a manager b) you'd appreciate any professional development they can provide in this area. The reason I call this out to start is because it's not always clear or obvious to managers that a team member wants this for him or herself (I've managed PMMs who want to stay individual contributors or move laterally into product management roles). I also know that there are a ton of managers who aren't proactive about having career developement conversations with their direct reports so in the absence of them not talking to you about this, start the conversation. That's part 1.
Part 2: Understand if there's a path for growth within your current company
If there's a precedent for people moving up in your organization or the company is scaling in such a way where there's a need to grow teams, that's great. There's also the possibility that you may never move up in your current company in which case the only way to move up maybe actually be to move out.
If you think you can grow within your current company:
- make sure your work product is exceptional. be the type of individual contributor who is setting a higher bar
- demonstrate that you're thinking beyond your own individual swim lane. showcase a commitment to operational excellence and process. be the person who is documenting their work, teaching others, and leaving a clear paper trail of artifacts that can be referenced as playbooks.
- practice servant leadership. in the absence of having a formal title, are you the type of person who is sharing knowledge generously within your org and also showing a genuine concern for others
- to the extent that you can work on complex and cross-functional projects and be seen as an A+ collaborator and communicator, the better
As a people manager, if someone had a track record of the above and there was a management or lead position open on my team, I'd be more inclined to give someone in-house a shot than hire an outsider above them.
If you think you can't grow within your current company and you want to be a director:
- seek out roles at startups where its understood at the onset that an experienced product marketer can and will grow into a manager
- seek out companies where there's a clear growth path for product marketers and demonstrated mobility within the existing team
I've always been a believer in learning by doing, but I also have had many managers and mentors along the way who gave me a shot in the absence of experience. Maximize your options by doing exceptional work, learning by doing (side hustles, extracurriculars, etc.), and growing your network. And to the extent that you have a good relationship with your manager, get them involved in this process. Great managers want you to succeed whether it's at your current company or not.