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Scientific Computing Group, June 2018
Top, left to right: Andrew Wiedlea, Tin Ho, Matthew Li, Connor Williams, Krishna Muriki, Kai Song, Susan James, Jimmy Mai
Bottom, left to right: Erica Yee, John White, Jackie Scoggins, Gary Jung, Karen Fernsler, Zashary Maskus-Lavin, Wendy Avalos


Gary Jung
Gary Jung | GMJung@lbl.gov

Gary Jung is the lead for the Scientific Computing Group at the Lab and is the manager for the High Performance Computing service at UC Berkeley. He has been in the HPC field for over 20 years and started the Scientific Computing Support program at the Lab in 2003 — one of the
first such programs at a large Tier 1 research institution. He also led the effort to launch Lawrencium in 2008, a Top500 list HPC Linux cluster at the time, in order to make institutional HPC available to all Lab researchers. Other projects include a strategic role in the development of the highly successful Berkeley Research Computing program at UC Berkeley in 2014.

Gary holds a bachelor’s degree in computer science from San Francisco State University. His hobbies include traveling, cooking and working on HPC (high performance cars).


Jeff D'Ambroglia | JeffD@lbl.gov

Jeff is a Science IT consulting engineer who provides consulting support and services to science and technical programs at the Lab. Prior to joining the Lab, Jeff spent 5 years as the CTO for a national specialty pharmacy company, building the business from the initial founding to the sale of the company. Prior to that Jeff spent over 20 years as an IT consultant working for various startups and established companies in a number of different industries including biotech, e-commerce, healthcare, publishing, and music. Jeff holds a B.S. in Biology from UC Santa Barbara. His first computing experiences were at the Lawrence Hall of Science playing “Hunt the Wumpus” on a teletype. He enjoys spending time outdoors doing various activities with his family and dog.

Wei Feinstein
Wei Feinstein | WFeinstein@lbl.gov

Wei Feinstein joined the group as an HPC User Services Consultant in 2018. Prior to the Lab, she was an HPC consultant at Louisiana State University, where she assisted faculty, researchers and students from a wide range of scientific disciplines to optimize their simulation workflows, troubleshoot HPC related issues and port codes to computational accelerators. Wei strives to bring cutting-edge HPC technologies to scientific research communities to best facilitate their research endeavors. To this end, she also gives tutorials and workshops that are essential for HPC users, such as parallel programming.

Wei has a research background in computational biology and bioinformatics, and was actively involved in projects such as protein structure modeling and ligand binding site identification.

She holds a master’s degree in computer science and a Ph.D. in medical sciences. Wei enjoys traveling and watching sports, especially horseback riding.

Karen FernslerKaren Fernsler | KMFernsler@lbl.gov

Karen Fernsler is a HPC Systems Engineer who builds and maintains HPC LInux clusters at the Lab and on the UC Berkeley campus for the Berkeley Research Computing program. In addition to being the group’s Globus expert, she also supports Linux in various flavors for servers and workstations for the ALS and Molecular Foundry national user facilities.

Prior to joining the Lab in 2009, she worked as a Systems Engineer at the National Center for Supercomputing Applications (NCSA) at the University of Illinois. At the NCSA, she was proud to be on the team that deployed Tungsten, one of the largest clusters in existence at the time when it debuted at fourth on the Top 500 in 2003. Karen lives to enable scientists in their pursuit of knowledge.

Karen holds bachelor's degrees in physics and computer science from Knox College in Galesburg, Illinois. She likes to cook, hike, swim, garden, and craft in her free time.

Tin Ho
Tin Ho | tin@lbl.gov

Tin Ho is a HPC Systems Engineer who joined the group in 2017 and was responsible for putting LR5, the latest generation of the Lawrencium cluster, through the acceptance tests and into production. He finds working on the computing system for the GRETA project, a next-generation gamma-ray detector, especially inspiring as it will require using technologies that will last into the 2030s. Prior to coming to the Lab, he worked in the pharmaceutical and software industries.

Tin holds a B.S. and M.S. in computer science from Florida International University.

Susan James | SJames@lbl.gov

Susan James is an HPC Systems Engineer specializing in HPC workflow environments to facilitate scientific inquiry and discovery. Since joining the Lab in 1998, she has worked for the IT Division’s Computer Infrastructure Support Group before moving to SCG.

Her 20+ years of experience at the Laboratory includes helping researchers architect, deploy, configure, and maintain scientific and high performance computing systems. With her unique set of knowledge, skills, and experience, she not only helps develop innovative solutions to resolve user requirements, but also engages in research and evaluation of new technologies to support the group’s mission of accelerating scientific discovery through high performance computing, data management, and data analysis into the next decade.

Her roots are in Silicon Valley (she grew up in Santa Clara) and her career path led her through various government organizations before she came to the Lab. She holds bachelor’s and master’s degrees in public health science from California State University, San Jose.

Zashary Maskus-LavinZashary Maskus-Lavin | ZMaskusLavin@lbl.gov

Zashary Maskus-Lavin helps support and maintain clusters for the SCG. She has been interested in computing and technology from a young age, with a more recent focus on programming, development and support. At the Lab, she relishes being part of a team that enables researchers to use supercomputers for scientific research on a massive scale. Her internship has allowed her to try a wide range of experiences as she works on varied tasks from day-to-day.
Zashary is a recent graduate from California State University, East Bay with a B.S. in computer science. She enjoys playing video games in her spare time.

Krishna Muriki
Krishna Muriki | KMuriki@lbl.gov

Krishna Muriki leads the HPC User Services effort for both the Lab and the Berkeley Research Computing program on campus. When he’s not overseeing major service rollouts or mentoring interns, he debugs issues with the OS and application stack, as well as helps researchers perform computational work on the SCG’s Linux cluster resources. Before coming to the Lab in 2008, Krishna worked as a HPC User Services Consultant at the San Diego Supercomputer Center.

Krishna holds an undergraduate degree in electronics and communications engineering from a technical university in Hyderabad, India and a master’s in computer engineering from Clemson University in South Carolina. He enjoys being outdoors and close to nature, especially while camping with family and friends during the summer.

Jackie Scoggins
Jackie Scoggins | JScoggins@lbl.gov

Jackie Scoggins is a HPC Systems Engineer and is the group’s expert resource on batch schedulers and resource managers. Throughout her career, she has played a vital role in developing, deploying and operationally supporting scientific computing resources throughout the Lab. In addition to her 16 years in IT, she also worked six years at NERSC supporting HPC systems, including a management stint as the team lead for the Operations Technology group.
Jackie is a founding member of the Lab's African American Employee Resource Group (AAERG), and a member of the Women Scientists & Engineering Council and the Diversity Advisory Board. She was also a Professional Mentor for the Tech Women 2017 program and recently honored as one of the recipients of the prestigious 2018 Women @ The Lab award.
She holds a B.S. in computing science with a minor in mathematics from California State University, Hayward. She enjoys teaching praise dance, singing Karaoke, planning events, and working with youth and young adults as a spiritual guidance leader.

John White
John White | JWhite@lbl.gov

John White is an HPC Systems Engineer specializing in storage systems. He works with customers from day one of cluster design through implementation, maintenance, and eventual retirement. Most of his career has involved design and implementation of parallel file systems, but his work touches almost every aspect of HPC work within the SCG.
His first job in HPC was fresh out of college in 2005 at the San Diego Supercomputer Center, where he was the lead engineer on Intimidata and the Teragrid IA64 Cluster, as well as GPFS-WAN, the first academic wide-area parallel file system. He moved to the Lab in 2008, where he finds building and maintaining systems that produce science with real-world impact very rewarding.
John holds a B.A. in information science and technology from SUNY Albany. He is an avid hockey fan and homebrewer.

Student Interns

Dongyao Liang | DongyaoLiang@lbl.gov

Dongyao (Dave) is an intern supporting our HPC clusters and building scientific software packages for our scientists. He was recently part of the Laney College team that participated in the Student Cluster Competition at SuperComputing 2018 where he was responsible for the performance optimization of the scientific codes. Dongyao was recently accepted to UCLA and will be startingthere in the Fall to complete his BS degree in Computer Science.

Edison Lam | elam3@lbl.gov

Edison Lam will be helping with the support of the HPC systems at the Berkeley Labs as an intern this summer. He is studying computer science at the City College of San Francisco and will be transferring to a four year institution next year. Edison studied Linux administration at CCSF, which led to a certification through Red Hat. He currently holds a certificate for the RHCSA, and plans on getting the RHCE later this year.

During his free time, he likes to explore bicycle routes in the Bay Area.

Ryan Chan | ryanchan@lbl.gov

Ryan Chan is a summer intern who works on a variety of projects to support the group. At the lab, he is currently working on a project to update and improve the monitoring systems for the HPC infrastructure. He has been part of UC Berkeley's Open Computing Facility for several years, which is where he got started with Linux systems. 

Ryan is currently an undergraduate studying Computer Science at UC Berkeley, and will be entering his third year there in the fall. In his free time, Ryan enjoys reading, playing video games, and fencing.