Over the years I have mentored many technologists in the high tech industry. It will come as no surprise most are introverted and quiet, preferring to quietly do the things they enjoy, which is to solve hard problems and learn new things constantly. At some point they start understanding that solving problems is not enough to be successful in the world. You need to be able tell others about the problem you solved and show your solution. Very often, to get the time and/or resources to finish solving a problem you also will need to influence others and get their support. This is very hard for most technologists because they do not have the self-confidence to present their case and gain the support of key decision makers.