Google Maps Listings

As shown in the image, I'd like a google map software where my employees (only) can list the locations we'll be delivering to. This should also be viewable by viewers on the website. Preferred if this was made as a WordPress plugin, but any CMS coding would work, just as long as only employees can add the listings. Also, there must be a different icon for mosques, businesses, restaurants, etc. This will be for California only.