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Walter Grandez

Walter Grandez

Sport Scientist

US Soccer | San Diego

Technologies

My Portfolio Highlights

My New Workbook

Analyzing unicorn company data

My New Course

Introduction to SQL

My New Workbook

Introduction to Python

Quantitative magician, conjuring valuable knowledge from data spells.

My Work

Take a look at my latest work.

DataLab

Analyzing unicorn company data

DataLab

Introduction to Python

DataLab

Introduction to SQL

DataCamp Course Completion

Take a look at all the courses I’ve completed on DataCamp.

My Work Experience

Where I've interned and worked during my career.

San Diego FC | Nov 2024 - Dec 2025

Performance Scientist

Sports Science Operations and Data Integration: Driving sports science initiatives to enhance decision-making and optimize athletic performance. I integrate advanced data analysis with high- performance strategies, leveraging sports science models built using Python, SQL, and DAX to transform complex datasets into actionable insights. Collaborating across departments, I lead testing protocols, integrate performance and medical data, and support return-to-play strategies, ensuring operational efficiency and a data-driven approach to maximizing human performance.
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Professional Soccer Performance Association | Jan 2024 - Present

Performance Scientist Representative

Performance Association (PSPA), representing sport and performance scientists working across professional soccer in North America, including Major League Soccer (MLS) and the National Women’s Soccer League (NWSL). In this role, I collaborate with PSPA leadership and the Sport Science Special Interest Group to support initiatives that promote evidence-based practice, professional standards, and collaboration across clubs and leagues. Responsibilities include facilitating dialogue among practitioners, contributing to association initiatives, and participating in regular meetings focused on elevating the role and impact of sport science within the professional soccer environment.

Los Angeles Football Club (LAFC) | Jan 2024 - Nov 2024

Performance Scientist

Data-Driven Strategy: Focused on transforming complex datasets into actionable knowledge, my role is central to optimizing decision-making within the high-performance department. Through rigorous data analysis and modeling, I support strategic initiatives that drive athletic performance and operational efficiency.

Philadelphia Union | Jan 2022 - Dec 2023

Lead Sport Scientist

Accomplishments: 2022 Eastern Conference Champions and MLS Cup Finalist. Comprehensive Data Oversight: Led club wide performance department’s data collection efforts, encompassing training load, testing and assessment, playing time, contextual information, medical data, and the tagging of performance- related information in videos. This role was crucial in maintaining a seamless flow of data and ensuring comprehensive athlete monitoring. Innovative Data Systems Modernization: Modernized the organization’s performance and medical data analytics stack, transitioning to a custom solution incorporating SQL, Power BI, MS Excel, and Python. This development provided enhanced data manipulation capabilities and improved analytical processes, supporting more informed decision-making across the club. API Pipeline Development: Collaborated in the development of Catapult’s API pipeline via AWS S3 and Databricks, significantly advancing the club’s new data infrastructure. This initiative facilitated more efficient data integration and accessibility, streamlining data usage across departments. Athlete Profiling for Strategic Recruitment: Spearheaded the creation of club- wide athlete profiling assessments. These profiles are instrumental for the scouting and performance departments in identifying and nurturing homegrown talent, aligning recruitment strategies with the club’s long-term goals. Advanced Performance Reporting: Developed sophisticated performance reports. These reports assist technical, performance, and medical staff in the daily selection of drills, optimizing physical output to meet targeted performance goals. Leadership in Sport Science Education: Supervised the club’s sport science fellows and interns, fostering a learning environment that promotes research and practical application in sport science, enhancing the club’s overall scientific capabilities.

Philadelphia Union | Nov 2020 - Dec 2021

Academy Sport Scientist

Analytics Implementation: Developed Microsoft Excel workbooks and PowerBi models to enhance data-driven decision-making within the academy. This initiative played a critical role in leveraging data to optimize academy performance and strategic outcomes. Athletic Assessment Redesign: Redesigned the academy's assessment processes to more accurately quantify and objectify factors such as athleticism, growth and maturation, and bio-banding. This redevelopment provided a more robust framework for tracking athlete development and ensuring alignment with performance goals. Reconditioning and Return-to-Play Protocols: Collaborated closely with academy athletic trainers to refine reconditioning and return-to-play models using GPS match data and heart rate sensors. This effort improved the precision of our rehabilitation protocols and reduced the risk of re-injury among young athletes. Educational Leadership: Delivered a series of continuing education presentations at the club’s “Coaches’ Education” meetings and other performance-related webinars. These presentations were designed to disseminate cutting-edge performance insights and foster a culture of continuous learning among coaching staff.

U.S. Soccer Federation | Nov 2019 - Present

Youth National Team Sport Scientist (Network)

N/A

LA Galaxy | Nov 2019 - Jun 2020

Academy Sport Scientist

N/A

Philadelphia Phillies | Jul 2019 - Nov 2019

Strength and Conditioning Coach

N/A

USA Rugby | Jun 2019 - Jul 2019

Sport Scientist

N/A

United States Olympic & Paralympic Committee | Jan 2019 - Jun 2019

Strength and Conditioning Coach

N/A

University of Southern California | Aug 2018 - Dec 2018

Strength and Conditioning Coach

N/A

California State University, Northridge | May 2017 - Sep 2018

Assistant Strength and Conditioning Coach

N/A

EXOS | May 2016 - Aug 2016

Performance Specialist

N/A

My Education

Take a look at my formal education

Doctor of Philosophy - PhD, Sport ScienceTeesside University | 2024
Master of Science (M.S.), Kinesiology: Sports Conditioning & Orthopedic RehabilitationA.T. Still University of Health Sciences | 2020
Bachelor of Science (B.S.), KinesiologyCalifornia State University, Northridge | 2016
Alhambra High School

About Me

Walter Grandez

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