I think it is. I work for a (relatively) small company. I naturally grew from project engineer to senior/lead/sme (including pioneering tech _for my industry_) to SA. I had also stuck with my company for many years, so I have the industry connections and got to be known as a heavy hitter. That trust relationship with the customers mixed with technical know how = sales and consulting.

Again, because of the size of my company I can make my role fluid (including a good way), but call it what you will I engineer, I sell, I consult.