Effective Outreach to US CEOs Hiring for Lead Gen & Marketing Roles

What's the most effective way to reach out to CEOs of companies located in US, with 1-50 headcount that have posted a job for 'Lead Gen', 'Marketing Specialist' in last 30 days? I know I can do all inside Clay with enrichments, but I would be wasting credits. I also have Apollo account, so I'm looking for help in creating the workflow that will be the most efficient for my current tech stack. Thanks! 🙂