About DataLA

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The Mayor’s Data Team implements Mayor Garcetti’s data strategy for the City of Los Angeles. We work with city departments, the civic tech community, sister cities, private partners, and academics to develop insights and digital tools that make the City more livable and equitable for all Angelenos. 

Want to learn more about our work? Want to share your perspective or creation? Please contact mayor.opendata@lacity.org. To submit a data request, please fill out this form.



Sari Ladin-Sienne, Chief Data Officer, Director of Mayor’s Data Team
Sari Ladin-Sienne executes Mayor Garcetti’s vision for a more responsive, and data-driven Los Angeles. As Chief Data Officer, Sari improves access to meaningful information for residents and city employees. She leverages her policy knowledge and technical skillset to form new partnerships that tap into the value of data as a critical asset in smarter decision-making. She previously worked as a Harvard Ash Fellow for the Mayor’s Data Team where she led the team’s digital strategy and elevated the city’s best practices to the national conversation through her articles for Harvard’s Data Smart Cities and Government Technology. Sari has provided data analysis, budgeting, and policy recommendations to a range of public and nonprofit clients including the Consumer Financial Protection Bureau and the Nonprofit Finance Fund. She holds a Master's Degree in Public Policy from the University of California, Berkeley.


Leah Horgan, Design Fellow
Leah Horgan is a Design Fellow for the Mayor’s Data Team. She handles web design and management and designs outreach materials and UX experiences for the team's digital assets. Leah is also working as a researcher through the Informatics PhD program at UC Irvine studying Civic Tech and Innovation. Prior to joining the Data Team and the PhD program, Leah studied for two years in the Media Design Program at Art Center College of Design. Beforehand, she worked as a Design and Communications Associate and as an executive assistant for over three years with Policy Group in MIT’s Poverty Action Lab.


Izzy Mitchell, Data Services Lead
As Data Services Lead, Izzy is responsible for implementing citywide use of the GeoHub and developing a strong mapping culture in the City of Los Angeles. Prior to joining the Data Team, Izzy worked as a researcher and data scientist in the Department of Cultural Affairs. There they developed the Neighborhood Arts Profile and were responsible for managing and advancing data pipelines as well as generating resources for departmental reports. While attaining a Bachelor’s Degree in GeoDesign at USC, Izzy performed a crime trend analysis that became a key component of the Community Safety Data Commons. Izzy uses they/them pronouns.


Adam Scherling, Open Data Coordinator
Bio to come. 


Chelsea Ursaner, Solutions Architect
Chelsea's focus is making data accessible and meaningful to city employees and the public. She holds a Master of Science in Business Analytics from USC Marshall School of Business. Prior to becoming an Angeleno, she worked at Epic, a healthcare software company in Madison, Wisconsin. There she developed a core belief that software should be a delight to use and a passion for implementation and training. As such, she is constantly working with data coordinators across the city to improve our two open data portals, data.lacity.org and geohub.lacity.org and building long-term data infrastructure. Outside of the city, she freelances in data science and visualization and leads the Quantified Self LA meetup group.