Bulk Add, Maintain and Delete Products - Magento

I am looking for a full-time partner to add, maintain and delete products from one of our Magento stores. The source of the product data will be both Excel files and web sites. This project is for thousands of records so this cannot be done manually. You are; - A long time Magento expert with a ton of experience in bulk product/category upload to Magento using Magmi or similar - Expert with Magento product options - Expert web scraper - Able to create and work with macros to identify changes between spreadsheets to aid you in maintaining our product catalog - Already working with clients who operate large ecommerce stores - Proud of your accuracy - 150% reliable - Able to work on PST or partial PST time (USA) - Able to work with tens of thousands of product records To clarify - you will be creating new brands and adding products to our store. The source of this data will be another website or a spreadsheet or both. Once these products are added, you will maintain them by comparing the product data on our store with other sources. We are growing rapidly and its my goal to find a trusted partner that will ultimately become responsible for all of our Magento stores. Please do not apply if you do not have the above skills and a team that can cope. Don't treat this as a learning curve project.. we want to learn from you. Not the other way around.