I am a Systems Engineer with many years of experience in electronic systems, including communication systems, network systems, and radar systems, with a focus on signal processing and architecture. "Know your customer and his/her needs." My hobbies include photography, yachting, software development, writing, and foreign languages.
If you don't know what to do with your spare time, go walk your dog. If you don't have a dog, walk someone else's dog. It's a better way for you to spend your time than what you are doing right now. If you think you don't have any spare time, then you probably don't have a dog.