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Director - CASIS | Group Leader - Artificial Intelligence Research Group (AIRG) | Ph.D. | Principal Investigator | Engineering Postdoc Program Coordinator | Chair IEEE Computer Society SF/OAK/EastBay
Ruben is an Artificial Intelligence Researcher with expertise in advanced machine learning methods, including Generative AI, Reinforcement Learning (RL), Multi-agent RL, and LLM post-training methods. He is an excellent networker and strong collaborator with a good eye for opportunities and creative problem-solving skills. His academic background builds on a Diplom-Ingenieur degree in Mechatronics from the Karlsruhe Institute of Technology (KIT), Germany, and a Ph.D. in Computer Engineering from the University of São Paulo (USP), Brazil. At the Lawrence Livermore National Laboratory (LLNL), he is currently working on advancing AI for science across a wide range of applications of interest to national security while addressing associated risks and safety considerations. As Director of the Center for Advanced Signal and Image Sciences (CASIS), Group Leader for the Artificial Intelligence Research Group (AIRG), and Engineering Postdoc Program Coordinator, Ruben consistently demonstrates leadership qualities by identifying strategic opportunities, fostering collaboration, and managing people and complex projects with clear communication and budgetary oversight. In addition to his professional roles, Ruben is an active community builder, chairing the IEEE Computer Society chapter for SF/OAK/EB, acting as treasurer of the LLNL robotics and automation employee resource group, and member of LLNL’s Community Emergency Response Team (CERT). His personal interests in Longevity, work-life balance, and continuous self-improvement further highlight his commitment to both professional excellence and personal growth.
USP - Universidade de São Paulo
Doctor of Philosophy (Ph.D.), Machine Learning
January 1, 2015 – January 1, 2019
Universidade Estadual Paulista Júlio de Mesquita Filho
Master of Engineering (MEng), Mechanical Engineering
January 1, 2012 – January 1, 2014
Karlsruhe Institute of Technology (KIT)
Diplom-Ingenieur, Mechatronik
January 1, 2004 – January 1, 2011
Lawrence Livermore National Laboratory
Group Leader AIRG
March 1, 2024 – Present
Lawrence Livermore National Laboratory
Director CASIS
July 1, 2023 – Present
Lawrence Livermore National Laboratory
Engineering Postdoc Program Coordinator
April 1, 2023 – Present
Lawrence Livermore National Laboratory
Senior Staff Researcher Machine Learning
December 1, 2022 – May 1, 2024
Lawrence Livermore National Laboratory
Staff Researcher Machine Learning
July 1, 2021 – November 1, 2022
Lawrence Livermore National Laboratory
Postdoctoral Researcher Machine Learning
July 1, 2019 – June 1, 2021
Microsoft
Research Intern
June 1, 2018 – October 1, 2018
Redmond, WA, United States
PAPIs.io
Lead Organizer
February 1, 2017 – July 1, 2019
Escola Politécnica da USP
Ph.D. Machine Learning
March 1, 2015 – June 1, 2019
São Paulo und Umgebung, Brasilien
UNESP
Research Assistant
January 1, 2012 – February 1, 2014
Guaratinguetá und Umgebung, Brasilien
SanioSolar
Project Engineer
July 1, 2011 – December 1, 2014
Karlsruhe Area, Germany
Strand Writing & Design
Technical and Business Interviewer
July 1, 2010 – August 1, 2011
London, Großbritannien
1&1 Internet AG
Datacenter Engineer
May 1, 2010 – December 1, 2011
1&1 Internet AG
Datacenter Special Forces
September 1, 2001 – April 1, 2010
PAPIs Connect Brazil 2017
June 1, 2017 – Present
Latin America's 1st conference on real-world Machine Learning applications
Certified ScrumMaster® (CSM®)
Scrum Alliance
June 24, 2026 – Present
Machine Learning (Andrew Ng / Stanford University)
Coursera
June 24, 2026 – Present
AI for Trading
Udacity
June 24, 2026 – Present
Agile Software Developer
Udacity
June 24, 2026 – Present
Developing Innovative Ideas for New Companies: The First Step in Entrepreneurship
Coursera
June 24, 2026 – Present
Model Thinking
Coursera
June 24, 2026 – Present
An Introduction to Interactive Programming in Python
Coursera
June 24, 2026 – Present
Data Analysis
Coursera
June 24, 2026 – Present
Computational Investing, Part I
Coursera
June 24, 2026 – Present
Cultural Fit Analysis
The candidate's background includes diverse experiences from academic research (Ph.D., Postdoctoral Researcher) to industry (Microsoft Research Intern, 1&1 Internet AG) and entrepreneurial/community roles (PAPIs.io Lead Organizer, SanioSolar Project Engineer). This breadth suggests adaptability and an ability to thrive in various environments. The focus on real-world applications of Machine Learning and involvement in organizing conferences indicates a proactive, collaborative, and knowledge-sharing mindset. The long tenure and progression at Lawrence Livermore National Laboratory also suggest loyalty and a capacity for sustained contribution. While the primary focus has been on Machine Learning research, the 'Data Analysis' and 'Computational Investing' certifications, along with the 'Datacenter Engineer' experience, show a foundational understanding of data-centric roles, which could align with a Data Analyst position, albeit with a strong research/ML bias.
Soft Skills & Operational Fit
The candidate's experience as a Lead Organizer for international conferences and various leadership roles at Lawrence Livermore National Laboratory suggests strong organizational, communication, and team coordination skills. The descriptions of research projects imply problem-solving, critical thinking, and an ability to work on complex, multi-faceted initiatives. The role as a Technical and Business Interviewer also points to strong interpersonal and analytical communication abilities. The certifications in ScrumMaster and Agile Software Developer indicate an understanding of agile methodologies, which is beneficial for operational fit.