ACM GROUP Steering Committee

ACM GROUP Steering Committee consists of former program and general chairs, representing the diverse institutions and countries participating in the ACM GROUP conferences. In addition to the physical meeting at the conference every other year, the Steering Committee virtually meets each quarter to provide programmatic and logistical support for the organizing team of the upcoming conference. The work of SC ensures that the conference evolves over time and provides an innovative venue for GROUP-related research. The ACM GROUP conference has a long-standing partnership with the ACM CSCW and ECSCW communities, and one of the Steering Committee’s responsibilities is to coordinate dates and activities across these conferences.

SC Members & Roles:

  • Mark Ackerman, University of Michigan, USA (SC Early Career Programs)
  • Louise Barkhuus, IT University of Copenhagen, Denmark (SC General Chair Liaison)
  • Sean Goggins, University of Missouri, USA, (SC Local Arrangement / Treasurer)
  • Tom Gross, University of Bamberg, Germany (SC IFIP Liaison)
  • Stephen Hayne, Colorado State, USA (Emeritus)
  • Kori Inkpen, Microsoft Research, USA (SC Funding)
  • Isa Jahnke, University of Missouri, USA and University of Muenster, Germany (SC Accessibility, ACM SIGCHI Conferences Board Liaison)
  • Claudia Müller, University of Siegen, Germany (SC TP Memory)
  • Michael Muller, IBM Research, USA (SC Diversity, SIGCHI CARES Liaison)
  • Michael Prilla, Clausthal University, Germany (SC Communication)
  • Lionel P. Robert Jr., University of Michigan, USA (SC General Chair Liaison)
  • Aleksandra Sarcevic, Drexel University, USA (SC Chair, PACM HCI Liaison)
  • Hilda Tellioglu, TU Wien, Austria (SC Diversity, EUSSET Liaison)
  • Adriana Vivacqua, Universidade Federal do Rio De Janeiro, Brazil (SC Papers Chair Liaison, Liaison for Latin America)

Mark Ackerman is the George Herbert Mead Collegiate Professor of Human-Computer Interaction and a Professor in the School of Information and in the Department of Electrical Engineering and Computer Science at the University of Michigan, Ann Arbor. His major research area is Human-Computer Interaction (HCI), primarily Computer-Supported Cooperative Work (CSCW), investigating collaborative information access in online knowledge communities, medical settings, and expertise sharing. Mark is a member of the CHI Academy (HCI Fellow) and an ACM Fellow. Mark was Program co-chair for Group ‘05.

Louise Barkhuus is an Associate Professor in the Computer Science Department at the IT University of Copenhagen, Denmark. Her research area is Human-Computer Interaction and Computer-Supported Cooperative Work (CSCW) and focuses on digital technologies for preserving people’s privacy, particularly with respect to mobile applications and devices. She also looks at overall data privacy experiences for users of social technologies. Her first GROUP was in 2005 where she presented her PhD research as both a short paper and poster. She has continuously served on the review committee for GROUP since then. Louise was General co-chair for GROUP 2020.

Sean Goggins is a Professor of Computer Science at the University of Missouri-Columbia. His research interests are in social computing, particularly in the areas of collaborative social computing research infrastructure, open source software as a sociotechnical system, and games for learning. Sean is active with the Consortium for the Science of Sociotechnical Systems, creator of the Masters in Data Science and Analytics at the University of Missouri, is Director of the Open Collaboration Data Exchange and is a founding member of the Linux Foundation’s CHAOSS working group, which is focused on open source software health and sustainability. Sean was the general Co-Chair for Group 2014, Workshops Chair for Group 2012, Posters Chair for Group 2010, local arrangements chair for Group 2016, 2018, and 2020, and Treasurer for Group 2020 and 2022. He has been a member of the GROUP Steering Committee since 2016.

Tom Gross is a Professor and chair of Human-Computer Interaction at the University of Bamberg Weimar, Germany. His research interests are in the fields of Human-Computer Interaction, Computer-Supported Cooperative Work, and Ubiquitous Computing. He has been a Program co-chair for Group 2010 and 2012, and a General co-chair of Group 2007.

Stephen Hayne is a Professor at Colorado State (USA). Dr. Hayne’s research interests lie mainly in collaboration, security, knowledge management, and "big" data analytics. He has recently received a $3M grant from the U.S. Department of Homeland Security to investigate near real-time detection and mitigation of distributed denial of service attacks (DDoS). He likes to use innovative technology to solve real problems. He’s implemented tools to help groups with communication and decision-making, i.e. shared drawing, group brainstorming, issue surfacing and consolidation, intrusion outlier detection classification and visualization. He has recently been investigating social networks, software engineering, and the reputation effects of feedback. Stephen has been the GROUP treasurer since 2003, and was Chair of the first 2 GROUP conferences in 1997 and 1999.

Kori Inkpen is a Principal Researcher and Research Manager at Microsoft Research. Her research interests are in the fields of Computer-Supported Cooperative Work and Human-Computer Interaction and her work explores next generation computing to support natural, seamless collaborative interactions, for both work and play. Her current focus is on how live video is changing the way we engage and communicate with others, and the potential it offers to transform the way we interact with friends, families, colleagues, and strangers. Kori has been actively involved in the Group community since 2005 and was Conference Co-Chair in 2007 and Program co-chair in 2012.

Isa Jahnke is an Associate Professor of the School of Information Science and Learning Technologies at the University of Missouri-Columbia. She is Director of the Information Experience Lab, a usability and User Experience (UX) lab that works with clients from a variety of fields such as Journalism, Medicine, Nursing, Engineering, Computer Science, Educational Technology, also offering a UX certificate. She was assistant professor at TU Dortmund, Germany (2008-2011) and professor at Umea University, Sweden (2011-2015). Her research interests focus on CrossActionSpaces and sociotechnical design for human centered work and learning processes. Recent studies include health care technologies, technologies for older adults and tablet classrooms. Isa published at Group 2003 the first time. She was Posters/Demos Co-Chair for Group 2010, Publicity Co-Chair for Group 2012, and general Co-Chair for Group 2014 (together with Sean Goggins). She now serves as a member of the GROUP Steering Committee since 2018.

Claudia Müller is an Assistant Professor for “IT for the ageing society” in the Department of Information Systems. She follows a praxeological and participatory design approach for assistive technologies for the elderly ( Her projects aim at the support and enhancement of social inclusion, mobility and autonomy of elderly people in order to strengthen quality of life and health status in higher age. Claudia is a collaborator in the Siegen PraxLabs approach (, which is based on a praxeological and participatory research paradigm. Claudia has published her first paper at GROUP 2010 (on IT in dementia care) and has co-organized a workshop in 2016. She served as a Program co-chair with Lionel Robert in 2018 and has been a member of the steering committee since then.

Michael Muller works as a Research Scientist at IBM Research in Cambridge, MA, USA. His research has involved grounded theory method and participatory methods. Michael studies domains such as social software use in organizations, text analytics for organizations, innovation practices in organizations, and more broadly the many ways that a diverse workforce can contribute to one another and to their company. In a series of conference activities, Michael has also helped to make safe spaces to discuss difficult topics, currently focusing on social justice and (most recently) intersectional issues in specific conference series. Michael was Program technical program co-chair for Group 2016 (and co-chair of other GROUP venues in previous years). He joined the GROUP Steering Committee in 2016.

Michael Prilla is a Professor for Human Centered Information Systems at Clausthal University of Technology, Clausthal-Zellerfeld, Germany. His research interest is on the design of usable and meaningful IT tools in times in which IT and the real world become more and more intertwined. This includes IT to support human cooperation, more specifically cooperative work in mixed and augmented reality, cooperation between humans and AI, as well as learning and reflection at work, and IT in healthcare environments. In his research, Michael uses an approach of socio-technical systems, which guides his work on the convergence of digital and physical interaction. He is chair of the German special interest group on CSCW and a member of the steering committee of the German SIG on human computer interaction. Michael served as posters co-chair for GROUP 2014 and as a general co-chair for GROUP 2018. He joined the steering committee in 2018.

Lionel P. Robert Jr. is an Associate Professor in the University of Michigan School of Information and core faculty at the University of Michigan Robotics Institute. His research focuses on theory-driven questions on collaborative action through technology and/or human collaboration with artificial intelligence and robotics systems. Lionel is the director of the Michigan Autonomous Vehicle Research Intergroup Collaboration (MAVRIC), an affiliate of the Center for Hybrid Intelligence Systems and the National Center for Institutional Diversity all at the University of Michigan and the Center for Computer-Mediated Communication at Indiana University. He is currently on the editorial board of Management Information Systems Quarterly, the Journal of the Association for Information Systems, ACM Transactions on Social Computing and the AIS Transactions on Human-Computer Interaction. Lionel first attended ACM Group in 2012 and later contributed to the conference organization as a Workshop Co-chair in 2014, Program Co-chair in 2018, and a General Conference co-chair in 2020. Lionel joined the GROUP Steering Committee in 2020.

Aleksandra Sarcevic is an Associate Professor of Information Science in the College of Computing and Informatics at Drexel University. Her research interests are in Computer-Supported Cooperative Work, focusing on pervasive computing and interactive systems for medical work. Aleksandra first attended ACM Group in 2007 as a student participant in the Doctoral Colloquium and later contributed to the conference organization as a Doctoral Colloquium co-chair (with Dan Cosley) in 2012, Interactive Posters/Demos co-chair (with Michael Prilla) in 2014, and a General Conference co-chair (with Stephan Lukosch) in 2016. Aleksandra joined the GROUP Steering Committee in 2016, and has been SC chair since 2020. She likes the friendly and intimate setting of the conference and looks forward to the Island Cow’s fried gators every time she visits Sanibel.

Hilda Tellioglu is an Associate Professor at the Artifact-Based Computing and User Research Group at TU Wien (Vienna University of Technology), Austria. As a computer scientist, she has been involved with both research and teaching on software engineering, design and development of information technology in networked (work) environments, computer support for cooperative work (CSCW) in systems design, in health care work, in architectural planning and in manufacturing, gender issues in computer science, design thinking, as well as interaction and interfaces design. She was involved in ACM Group since 2012, as program committee member and as participant. She was General Conference co-chair with Thomas A. Finholt in 2012 and Workshop co-organiser of the Workshop "Collaboration and Coordination in the Context of Informal Care (CCCiC): Concepts, Methods, and Technologies" in 2014. She has been a member of the GROUP Steering Committee since 2012.

Adriana S. Vivacqua is an Associate Professor at the Federal University of Rio de Janeiro, Brazil. She has been involved in research on software engineering, information management, recommender systems, emergency/disaster management systems, collaborative systems and human-information interaction, especially as it relates to decision-making and group dynamics. She has been involved with the ACM GROUP conference since 2016, serving in various roles. She currently chairs the SIGCHI Latin American Committee presence in the SIGCHI community. She has worked with the SIGCHI Development Fund Committee and served as SIGCHI AC for Equity, and has been elected VP-at-Large for SIGCHI EC 2021-2024. Adriana joined the GROUP Steering Committee in 2020.