There is a lot of interest in teaching field service technicians to promote services. This makes sense as the field service professional is in the best position to recognize opportunities and to discuss these with their customers. To help them, many firms look to courses to train their field teams how to sell. But, if you’re serious about engaging your technicians in product and service promotion as part of your strategy to enhance service levels, then building personal and professional credibility are the most important skills needed for proactive service teams.