Answer:
field sales representative
Step-by-step explanation:
Based upon this description, Dominic could best be described as a field sales representative. This is a type of salesperson, usually those working for wholesale organizations, and who's main task is going outside of the company and visiting potential customers in order to sell them the company's products or services. Other than this the job mostly entails forming great professional relationships with the customers. One way of doing so is by attending events and making sure the products that you have sold are working correctly and that the customer is content with it, as described in the scenario in the question.