As HubSpot Sales Pro customer you have the ability to enable an bi-directional integration between HubSpot CRM and Salesforce. Here's how...
From your HubSpot Dashboard, click on Account Menu > Integrations
Locate the Salesforce integration section, click the button Integrate with HubSpot
When you're ready to go through the set-up wizard, click Let's go and follow the steps.
For a more detailed walk-through of this process, feel free to view this HubSpot marketing help article: How to set up the Salesforce integration with HubSpot