Job Details. Title: Cassandra Database Administrator. Location: Denver, CO (3 Days Onsite). Visa: No OPT, CPT. JD. The ideal candidate has 3-5 years experience in database administration with Cassandra databases in an enterprise environment. Bachelor's degree in Computer science or Information Systems with a minimum of 3 years in Mongo, Dynamo, and Cassandra databases. Ability to create and maintain new databases, modify existing DBs to add or re...