This open access book provides an overview of the dissertations of the eleven nominees for the Ernst Denert Award for Software Engineering in 2020. The prize kindly sponsored by the Gerlind ampamp Ernst Denert Stiftung is awarded for excellent work within the discipline of Software Engineering which includes methods tools and procedures for better and efficient development of high quality software. An essential requirement for the nominated work is its applicability and usability in industrial practice.The book contains eleven papers that describe the works by Jonathan Brachthuser EPFL Lausanne entitled What You See Is What You Get Practical Effect Handlers in CapabilityPassing Style Mojdeh Golaghas Fortiss Munich thesis How to Effectively Reduce Failure Analysis Time Nikolay Harutyunyans FAU ErlangenNrnberg work on Open Source Software Governance Dominic Henzes TU Munich research about Dynamically Scalable Fog Architectures Anne Hesss Fraunhofer IESE Kaiserslautern work on Crossing Disciplinary Borders to Improve Requirements Communication Istvan Korens RWTH Aachen U thesis DevOpsUse A CommunityOriented Methodology for Societal Software Engineering Yannic Nollers NU Singapore work on Hybrid Differential Software Testing Dominic Steinhofels TU Darmstadt thesis entitled Ever Change a Running System Structured Software Reengineering Using Automatically ProvenCorrect Transformation Rules Peter Wgemanns FAU ErlangenNrnberg work Static WorstCase Analyses and Their Validation Techniques for SafetyCritical Systems Michael von Wencksterns RWTH Aachen U research on Improving the ModelBased Systems Engineering Process and Franz Zieriss FU Berlin thesis on Understanding How Pair Programming Actually Works in Industry Mechanisms Patterns and Dynamics which actually won the award.