Marck Vaisman is a data scientist, consultant, entrepreneur, master munger and hacker. Marck is the Principal Data Scientist at DataXtract, LLC helping clients from start-ups to Fortune 500 firms with all kinds of data science projects. His professional experience spans the management consulting, telecommunications, Internet, and technology industries. He is the co-founder of Data Community DC, Inc. and co-organizer of the Data Science DC and R Users DC meetup groups. He has an MBA from Vanderbilt University and a B.S. in Mechanical Engineering from Boston University. Marck is also a contributing author of The Bad Data Handbook.