I've come into Scrum through a company backdoor... I am a geophysicist by training and worked on oil rigs for 3 years before moving into the office as a log analyst. My career progressed into geosteering (where we advise operators on how to place their well during drilling operations) and finally into the Technology domain in becoming a Subject Matter Expert, progressing to Product Owner/Project Manager of software development before our company embraced Agile and Scrum. Now, I am acting as ScrumMaster for one project which is distributed geographically and over 5 different timezones and 6 countries. It's challenging as I'm not co-located with any of my team members (long story) however we are making it work through exhaustive communication and some documentation.