Help sourcing contact emails with Lusha or Hunter

I'm looking for someone who is familiar with using contact/email sourcing tools like Lusha, Hunter and others to help me put together a list of email addresses for certain companies. I will provide the company names, and I need your help finding the email addresses of people with specific roles within those companies. All login details/subscriptions to the various platforms will be provided. The number of companies is approximately 250. Thanks, and looking forward to your proposals!