The best way to answer this is to start by stating that you are always open to pitching in where ever you can to help the company get the job done. You should also make the point that you are open to learning new skills that will help both you and the company. Then describe an incident to illustrate this.

"I have worked for several small companies where the employees wore many hats. I enjoyed this experience because it allowed me to learn new skills outside of my profession as an integration engineer. This helped me grow my portfolio of skills and contributed to the companies' success. In one case, I was asked to attend a trade show to research new data integration tools from a technical perspective. Even though I had no experience in this area, I accepted the assignment with enthusiasm. Attending the show and interfacing with the suppliers taught me a great deal about how engineering tools are developed and marketed, which helped me evaluate the features of applications used in the practice of data integration and make recommendations for adopting them to our management team."