Can you access both Calendars from within your normal Google Calendar on the web?
Assuming your company has shared out their calendar, you should be able to add that calendar as an additional calendar subscription on your personal Google Calendar. In your calendar view on the web, to the left of the calendar view, you should see a list of "My Calendars" with your main personal calendar in it, then under that "Other Calendars" which will include the company calendar.
To share out the company calendar (presuming you have permission to do this), log into the company calendar account, go to Settings -> Calendar Settings, click the Calendars tab and then click either "Share this calendar" or "Shared: Edit settings" and make sure that your personal account has at leats got permission to "See all event details" then click the calendar's name and you should see the the calendar addresses. Pick the ICAL address and copy the link.
Now log into your personal calendar and under "Other Calendars" click Add-> Add by URL, and paste the address you just copied into that box.
Once you have both calendars appearing for the one account on the web, then both should just show up on your Android phone, with the appointments coloured for which calendar they're in.