The CCTA 2021 technical program will feature the presentation of contributed and invited papers, as well as tutorial sessions and workshops, focusing on technological advances and applications of control engineering. This focus includes all aspects of control engineering for practical control systems, from analysis and design, through simulation and hardware. Themes such as energy, healthcare, manufacturing, and transportation will feature applications of control technology for robotic, automotive, biomechanical, aerospace, power and energy systems, control of networks, and many others. Plenary lectures focused on conference themes will be delivered on Monday and Tuesday as part of the conference program. Transition to Practice Award Lecture will be presented on Wednesday. A series of tutorial workshops will be presented on Sunday preceding the conference.For the first time in this conference series, the participants will have the opportunity to present their papers that were published in IEEE Transactions on Control Systems Technology. Papers that appeared in TCST from issue 4, 2019 or have been accepted for publication are eligible. Further details will be advised on the conference website.We look forward to meeting you in August 2021 in San Diego