The 2025-2026 Executive Committee

Sanhong Li has been working on Java since 2004, where he began at Intel R&D Lab, implementing JSR135. He progressed to working on developing IBM's J9VM in 2010, where he led a project to develop multi-tenancy technology for the JVM. In 2014, he joined Alibaba to lead the development of Alibaba Dragonwell, a downstream of OpenJDK. He has authored over twenty technical patents/papers in the areas of managed runtime and compiler and presented at various conferences such as JVMLS, JavaOne, JPoint, and Joker, QCon. He is the co-leader of the GreenTea JUG that is the largest JUG in China, Alibaba's representative of the JCP Executive Committee, and the GraalVM Project Advisory Board. In 2020, Sanhong Li became a Java Champion for services rendered to the Java ecosystem.

Denghui Dong has been working on Java since 2015. In 2017, he joined the Alibaba JVM team, focusing on reliability availability serviceability. He is an OpenJDK committer and the project lead for Eclipse Jifa.

Volker Simonis is a Principal Software Engineer in the Corretto team at Amazon Web Services. He works on Java Virtual Machines since 2004 and is an OpenJDK Member, Reviewer and Committer right from the start. Before joining Amazon he worked for SAP, Sun Microsystems and the University of Tübingen from where he holds a master and PhD degree in Computer Science. He represented SAP in the Executive Committee of the JCP and was a member of the JCP Expert Groups for Java SE 9 to 13. He's a passionate and frequent speaker at conferences around the globe and can easily be contacted at Twitter as @volker_simonis.

Stuart Monteith is a principal software engineer in the Open-Source Software group at Arm in Cambridge. There he has worked on porting work and optimising virtual machines, most recently OpenJDK, often under the auspices of Linaro. Prior to this he worked in the IBM Java Technology Centre with the JVM on various Linux platforms and other projects such as JSR-326. He has worked with Java since 1996 during his degree course at the University of Strathclyde. Along he has used Java on probably eight different instruction sets, and so believes the principle of write-once-run-anywhere remains important.

Shiyou Huang is a performance engineer in the infrastructure group at Arm, Austin US since 2020. There he works on Java performance analysis from microarchitecture level on Arm server cores, including benchmarking and testing of Java code to evaluate how efficiency of core features like branch predictor and hardware prefetchers etc. He also works on performance optimization of Java workloads on Arm platforms. Before that, he obtained his PhD from Texas A&M University, doing research on verification of Java concurrency on various relaxed memory models.

Gil Tene is CTO and co-founder at Azul Systems and has been active on the JCP EC since 2011 and was recognized as "JCP Member of the Year". Gil is an official "JavaOne Rockstar" and Java Champion, and a frequent speaker at developer conferences and JUGs. Gil has been building virtual machines for over 25 years. He founded Azul Systems with the goal of eliminating common Java responsiveness and deployment scalability barriers and pioneered several Java firsts, including Pauseless Garbage Collection, which has since made its way into modern collectors in the form of both C4 and ZGC. Outside of his day job, Gil has remained an active OSS developer and contributor for over 20 years. In past lives, he also designed and built operating systems, network switches, firewalls, and laser-based mosquito interception systems.

Gerrit Grunwald is a software engineer that loves coding for around 40 years already. He is a true believer in open source and has participated in popular projects like JFXtras.org as well as his own projects (TilesFX, Medusa, Enzo, SteelSeries Swing, SteelSeries Canvas, JDKMon). Gerrit blogs regularly at http://harmonic-code.org, he is an active member of the Java community, where he founded and leads the Java User Group Münster (Germany), he is a JavaOne rockstar and a Java Champion. He is a speaker at conferences and user groups internationally and writes for several magazines.

With 15 years of Java experience, Aleksei Voitylov is the CTO and co-founder of BellSoft. A seasoned Java developer, Aleksei worked at Sun and Oracle with various JVMs and JSRs implementations and helped deliver HotSpot and Java Language to the JDK.

He founded BellSoft to provide a high-quality Java SE Runtime relevant for all use cases. Aleksei is an Open Source Evangelist and OpenJDK contributor. He presents at various Java developer conferences and contributes articles to the Java Magazine.

Pasha has accumulated years of experience in software engineering, specializing in Java, and has held numerous leadership roles, making him deeply knowledgeable in the IT niche. As a Developer Advocate for BellSoft, Pasha educates the public on the latest Java-related technologies developed by BellSoft, while also contributing to the creation and testing of instruments for data engineers. Beyond his advocacy work, Pasha is actively engaged in writing Kotlin code, speaking at industry conferences, authoring technical articles, and several open source projects.

Sirisha Pratha is a Vice President and Principal Software Engineer in Application Development at BNY. Sirisha has more than 10 years of experience as a Java Software Developer. Sirisha is a committer on Eclipse Collections, an Open Source Java Collections Library. Sirisha co-leads Pittsburgh Java User Group and regularly speaks and attends at various other Java User Group meetups.

Rodrigo Graciano is a Director of Engineering at BNY. He is a Java Champion with over 15 years of software development experience. Rodrigo is a senior member and a Leader in the NYJavaSIG, the Java User Group from NY.

Victor Grazi is SVP / Software Architect at BNY. He is a Java Champion having coded serious applications since the earliest days of Java. He is the creator of the popular Java Concurrent Animated project, and when he is not with his wife and family, he loves speaking, writing, and coding.

Zoran Sevarac is the co-founder and CEO of Deep Netts Technologies, a startup focused on developing a Java-based AI development platform, and a full professor at University of Belgrade. The goal of this project is to simplify the process of integrating AI into Java applications and support the AI-driven evolution of the Java platform. His primary areas of interest include artificial intelligence, machine learning, software engineering, and Java. Zoran is a contributor to Apache NetBeans and several Java-related machine learning initiatives. He is also a recognized Java Champion and recipient of the Duke's Choice Award for his educational neural network software, Neuroph. In addition to his work in AI, he plays guitar and is a member of the Null Pointers, a Java community band.

Ivar Grimstad is the Jakarta EE Developer Advocate at Eclipse Foundation. He has served on the EC since 2016, worked on several JSRs and has been awarded as Outstanding Spec Lead and Start Spec Lead. At Eclipse, he works with Jakarta EE and MicroProfile.

Thabang Mashologu is VP of Marketing and Community Programs at the Eclipse Foundation. Thabang is responsible for the growth and well-being of the working groups and the diverse community of members, committers, and contributors at Eclipse. Previously Thabang was the VP, Operations at the Cloud Native Computing Foundation, and earlier helped to launch Jakarta EE, MicroProfile, and Eclipse Adoptium at the Eclipse Foundation.

Tanja Obradović is the Java Programs Senior Manager at Eclipse Foundation. Being involved with Java and Java EE for quite some time, with various companies and in various roles (development, consulting, management) revitalizing Enterprise Java with Jakarta EE and other Java open source specifications and projects, making them relevant and the technology of choice for application development is my particular interest.

Kenji Kazumura has been working with Java for about 20 years since Java was born, and now he is Senior Professional Engineer of Java Technology at Fujitsu Limited in Japan. He is in charge of developing Java Virtual Machine for Interstage Application Server and various Fujitsu middleware products. He has participated in the Expert Group of JSR 204 (Unicode Supplementary Character Support). He has optimized several huge enterprise Java applications, specifically in the field of mobile communication and financial service, in order to run with high performance and reliability. These systems contribute a great deal to the social infrastructures in Japan. He is now working to make the cloud environment be more useful by accelerating Java technology into this area.

Daishi Tabata is a distinguished Java software engineer at Fujitsu, known for his expertise in developing Android applications for various B2C systems.

Following his success in application development, he joined the JVM team, where he plays a crucial role in delivering Fujitsu's highly reliable JDK builds for mission-critical systems across sectors such as finance, government, and telecommunications.

In addition to his responsibilities in developing Fujitsu software products, Daishi actively contributes patches to the OpenJDK project, showcasing his commitment to the broader Java community.

He is also a recognized Java professional speaker, sharing his insights and experiences at various conferences in Japan.

Anton Arhipov is a Developer Advocate at JetBrains. With a background in server-side development, he has spent over a decade building software for developers. A Java Champion since 2014, Anton speaks at conferences, shares insights on the JetBrains' YouTube channel, and enjoys exploring new ideas in programming languages, AI-powered tooling, and developer workflows. He?s always experimenting with new tech, looking for ways to make coding more efficient and enjoyable.

Mark Little leads jboss technical direction and research/development. Prior to this he was SOA Technical Development Manager and Director of Standards. He joined JBoss in a partial acquisition of technology from Arjuna Technologies, where he was Chief Architect, Co-Founder and Director. Before starting Arjuna Technologies, Mark was a Distinguished Engineer at Hewlett-Packard, where he ran the transactions teams and was responsible for the world's first Web Services transactions product.

Over the years Mark has been heavily involved in standards. This includes activities in the OMG, where he was a collaborator on the Object Transaction Service (OTS) specifications since 1991 and chair of the Additional Structuring Mechanisms for the OTS standard. Mark has been involved with OASIS since 2000, where he was HPbs representative on the Business Transactions Technical Committee. He's also been involved with various other OASIS committees, such as WS-CAF, WS-TX, WS-RX, SOA-RM and WS-RF, working closely with colleagues from Microsoft, IBM, Oracle, BEA, and other companies. Mark was been involved with the W3C WS-Addressing working group since it started and is also on the WS-Policy and WS-CDL committees. He is active in the Java Community Process, as Red Hat's primary representative on the JCP and has worked on several JSRs.

Mark has been the lead developer and manager on a number of important products for companies including Hewlett-Packard and Red Hat. These include the first fully compliant OTS implementation as well as the world's first pure Java transaction service. He has extensive experience in the areas of fault tolerance, reliability, transactions, Web Services and SOA.

Mark has published extensively over the past 20 years at workshops, conferences, trade magazines etc. He is a co-author of four books, covering topics from distributed transactions to enterprise SOA. He has over 50 publications to his name and has presented at over 40 events. He is co-author on several Web Services specifications before they entered a standards body, including WS-Context, WS-MessageDelivery, WS-Coordination and WS-TX. He has also worked on papers and articles with colleagues/friends from Oracle, IBM, Microsoft, IONA Technologies and others. He has worked in the area of reliable distributed systems since the mid-80's and has a PhD on Fault Tolerance, Transactions and Replication. He is also a professor at Newcastle University.

Tim Ellison is a senior member of IBM's Runtimes Technology Centre with worldwide responsibility for open source engineering projects.

Prior to his current position he was part of the original Eclipse development team, and Vice President of the Apache Software Foundation Harmony Project. He is an expert member on numerous JSRs, including the Java modularity system and Java SE platform specifications.

Tim holds a BSc in Computer Science, an MSc in Computer System Design, and post graduate research in image analysis. He has contributed to the implementation of Smalltalk, IBM VisualAge, Eclipse, and the Java SDK for over twenty years. He has a broad knowledge of high performance runtimes, open source methodologies, and applying new language technology to difficult problems.

Derek White is the technical lead of the Java Platform Engineering team at Intel, working on Intel's OpenJDK development, performance analysis and benchmarking, and optimization of Java workloads such as Cassandra, Kafka, and OpenSearch.

Derek has worked on JVM implementations since 1995, starting with GC research and the "Exact VM" in Sun Labs. Other career highlights include working on Java (SE and ME) running on Arm (Arm7 to AARCH64), MIPS, and PowerPC, the original JVM for the FIRST Robotics Competition, and Java performance analysis and optimization work on the latest Intel Xeon processors such as Sierra Rapids and Granite Rapids.

Sandhya Viswanathan is Senior Principal Engineer and technical lead for Java platform optimizations at Intel. Sandhya has over 30 years of industry experience in compilers and software development tools. She holds Master of Computer Science and Engineering degree from Indian Institute of Science Bangalore. She joined Intel in 2008 and has since been working on Java Virtual Machine optimizations for Intel platforms leading Intel contributions to Java just-in-time compiler, core-libraries, runtime, GC, and Vector API. Sandhya is an OpenJDK Reviewer and has presented at Java conferences like JVMLS and JavaOne. She has been instrumental in establishing Intel as a key participant in OpenJDK Java community and is passionate about Java and its future.

Bruno Caballero works for MicroDoc Computersysteme GmbH and is based in Berlin, Germany. During his career, Bruno has developed a wide range of embedded software projects. Today he is involved in porting the Java virtual machine to new hardware platforms and operating systems, as well as supporting customers on creating Java solutions for embedded devices. His main interest is learning new methodologies to create faster and more secure Java applications.

Martijn Verburg is the Principal SWE Group Manager for the Java Engineering Group at Microsoft. Prior to the acquisition by Microsoft, he was the CEO and co-founder of jClarity. He is the co-leader of the London Java User Group (LJC) and previously represented them in the Steering Committees for both the Java Community Process and Jakarta EE. Martijn is one of the co-founders of Eclipse Adoptium (previously AdoptOpenJDK) and today represents Microsoft on its Project Management Committee (PMC).

Martijn is the co-author of "The Well-Grounded Java Developer" and "The Well-Grounded Java Developer 2". He was made a Java Champion in recognition for his contribution to the Java ecosystem.

Martijn can also be found at major conferences (JavaOne, JFokus, OSCON, Devoxx etc) where he is known for challenging the industry status quo as "the Diabolical Developer".

Georges Saab is senior vice president of development for the Java Platform Group at Oracle. His group is responsible for Java Standard Edition including the Java language, core libraries, and Java Virtual Machine.

Saab is a 35-year veteran of programming language and platform development. His work with the Java platform began as a developer of Java Standard Edition at JavaSoft and Sun Microsystems, where he was a founder of the Swing group and Java Webstart, and continued as he ran development of the JRockit JVM for many years at BEA Systems. Saab is the chairperson of the OpenJDK governing board. You can follow him on Twitter at @gsaab.

Machiel Bolhuis is Director, Standards & Technology Policy EMEA for Oracle where he is responsible for engagements related to standards, compliance, and Open Source Software (OSS) policy in the EMEA region. He participates in working groups of standardisation organisations that focus on AI, cybersecurity and cloud portability & interoperability.

He previously worked on competition law, tech policy and cybersecurity and privacy regulation at several national and international companies. He has published various articles on these topics and holds a MSc in cybersecurity from the Leiden University in the Netherlands.

Luke Kowalski is recognized for his loyalty and pragmatism, but he also excels in his ability to work across disciplines. He has executed projects involving legal issues (antitrust, IP, audits, litigation), acquisitions (due diligence, integration, or divestitures), technical standards (document formats), government affairs (EU/USA trade, IP reform, repatriation), and even managed functions like physical security, user interface design and accessibility.

He currently serves as a vp in the corporate architecture group at Oracle reporting to one of Larry Ellison's EVPs. Before coming to Oracle, he worked for various startups in technical, design, and business roles, as well as for Netscape's Server and E commerce divisions. He holds several patents and professional certifications, serves as an ISO representative for US through ANSI and lectures frequently at conferences and universities. His educational background includes advanced degrees from UTA, Pratt Institute, and Columbia University. He is currently teaching a blockchain challenge lab at UC Berkeley's Engineering School on Mondays and pursuing a distance learning PhD at University of Leicester in his free time.

Ixchel Ruiz has been developing software applications and tools since 2000. Her research interests include Java, dynamic languages, client-side technologies, and testing. As a Java Champion, Oracle ACE Pro, Testcontainers Community Champion, CDF Ambassador, Hackergarten enthusiast, Open Source advocate, public speaker, and mentor, Ixchel is deeply committed to fostering inclusive and collaborative tech communities. She actively mentors aspiring developers and champions initiatives aimed at increasing diversity and accessibility in the technology sector. Ixchel?s work is characterised by a relentless pursuit of innovation, a deep understanding of user needs, and an unwavering commitment to ethical technology development.

Götz Lindenmaier works for SAP for more than 10 years. After implementing and tuning the IA64 port for the SAP Java Virtual Machine he worked on various projects in the SAP JVM context including the release of new SAP JVM versions and the integration of new hotspot releases to SAP JVMs for older Java versions. He took a major role in the contribution of the PowerPC/AIX and S390 ports to OpenJDK and since then works on maintaining these in OpenJDK. He also contributes to OpenJDK with the major focus on improving its serviceability. He is a JDK and JDK 9 Reviewer and Committer in several other projects.

Götz studied at University Kiel and University of Massachusetts, Amherst and holds a master and PhD degree of the University of Karlsruhe (KIT).

Christoph Langer is a member of the JVM team at SAP. He's an all-rounder for OpenJDK, working in several areas such as class library, hotspot and JFR/JMC.

He's actively engaged in the OpenJDK community and currently serves as co-maintainer for the OpenJDK 11 LTS version.

Christoph is an alumni of the University of Cooperative Education (DHBW) in Stuttgart.

Martin Dörr has joined SAP's JVM team in 2011. He has experience in various areas of the JVM like Just-in-time compilers (C1 and C2), runtime code, garbage collection, debugging (JVMTI), native (JNI) and processor architecture specific code. Martin is an OpenJDK contributor and reviewer and actively maintaining processor specific code for IBM Power and z Systems.

Martin holds a Master of Computer Science equivalent degree from the University of Karlsruhe (KIT). He has professional experience in microprocessor development and compiler construction.

Bruno Souza is a Java Developer and Open Source Evangelist. As founder and coordinator of SouJava (Sociedade de Usuários da Tecnologia Java; Java Technology Users Society) and leader of the Worldwide Java User Groups Community at Java.net, Bruno helped in the creation and organization of hundreds of JUGs worldwide.

A Java Developer since the earliest days of the technology, Bruno took part in some of the largest Java projects in Brazil. Bruno is a Principal Consultant at Summa Technologies, and has extensive experience in large projects in the Government, finance and service industries. A Cloud Expert at ToolsCloud, he promotes and develops cloud-based systems using Java. Nurturing developer communities is a personal passion, and Bruno worked actively with Java open source communities and projects.

Bruno Souza is an Honorary Director of the Open Source Initiative (OSI), President of the innovation-focused Campus Party Institute, and Coordinator of Nuvem, the Cloud Computing Lab of LSI/USP. When not in front of a computer, Bruno enjoys time with his family in a little hideout near Sâo Paulo. An amateur in many things - photographer, puppeteer, father - he strives to excel in some of them.