The following link gives information on How to do Business with ESA, the European Space Agency, through what is called the Invitations to Tender on the EMITS. The portal explains how to register your company as a tenderer. Once your business is assessed and accepted, you are ready to go. From that point onwards, you will receive notifications from ESA that you can apply for on an open-based basis. Business opportunities are released regularly by ESA. EMITS maintains a full list of all Open Invitations To Tender (ITTs). These are open to all potential bidders.