DER Services, Inc provides rapid response to engineering issues. To keep our work more efficient, within budget, and on schedule, we can complete our review and approval with faxes, e-mails, digital pictures or drawings most of the time for our remote customer. We also provide onsite support at our customer’s request.  Our staff is prepared to react to your business needs by providing 24×7 engineering supports.  DER Services provides the following engineering or certification services to the aviation industry: