This book constitutes the refereed proceedings of the 17th IFIP WG 5.5 Doctoral Conference on Computing, Electrical and Industrial Systems, DoCEIS 2026, held in Lisbon, Portugal, during June 17–19, 2026.

The 36 full papers presented in this volume were carefully reviewed and selected from 62 submissions. 

They are grouped into the following topics: AI in Systems Design; Computational Intelligence and Machine Learning Methods; AI in Biomedical Systems; Smart and Fair Energy Communities; Intelligent Energy Systems; Water Management Systems; Human-centered Intelligent Systems; Interoperability and Collaborative Decision Making; Smart Cities and Sustainable Urban Systems; and Smart Infrastructures.