cv
Basics
| Name | Alejandro Gomez Espinosa |
| Label | Research Physicist & FNAL LPC Junior Distinguished Researcher |
| alejandro.gomez@cern.ch | |
| Url | https://alefisico.github.io/ |
| Summary | Experimental high-energy physicist specializing in Higgs physics, machine learning applications, and advanced reconstruction algorithms within the CMS Collaboration. Leading ttH(bb) and di-Higgs searches as well as workflow preservation initiatives at Carnegie Mellon University. |
Work
-
2026.10 - Present Pittsburgh, USA
Research Physicist
Carnegie Mellon University
Leading CMS Run 3 inclusive ttH(bb) and di-Higgs searches, machine learning developments, and scalable multi-backend workflows.
- Leading the CMS Run 3 inclusive ttH(bb) analysis, spearheading a modernized strategy that substantially outperforms previous measurements.
- Co-leading CMS Run 3 di-Higgs (HH) searches in the bbbb and bbWW channels; pioneered low-pT jet strategies boosting overall HH -> bbbb sensitivity by 10% and HH -> bbWW sensitivity by ~20%.
- Developing machine learning algorithms to enhance signal classification and improve background modeling via out-of-sample density ratio estimation.
- Co-supervising Ph.D. and Master's students on di-Higgs searches, inclusive ttH(bb) measurements, and machine learning applications.
- Architecting scalable Snakemake workflows and CI/CD pipelines executing across Slurm, Kubernetes, and HTCondor backends.
- Administering the local CMU physics computing cluster (GPU hardware, Slurm scheduling, and software environments).
-
2023.10 - 2026.09 Pittsburgh, USA
Postdoctoral Research Associate
Carnegie Mellon University
Co-led the CMS Run 2 di-Higgs to 4b analysis group, served as CMS Workflow Orchestration Convener, and established analysis preservation infrastructure.
- Served as CMS Workflow Orchestration and Analysis Preservation Group Convener (Sept 2024 -- Sept 2026), establishing tutorials and standards adopted community-wide.
- Co-led the CMS Run 2 di-Higgs to four b-quark (bbbb) analysis group, improving sensitivity by 30% using data-driven background estimations and synthetic datasets.
- Fully preserved the Run 2 analysis workflow (120+ jobs) using Snakemake and REANA.
- Designed and deployed multiple CI/CD pipelines (up to 50+ jobs) for automated software validation.
- Administered the local group computing cluster (Slurm queues, GPU nodes) and instructed CMS-wide workflow training sessions.
-
2022.10 - 2023.09 Zurich, Switzerland
Visitor Researcher
ETH Zurich
Automating validation and finalizing jet substructure studies.
- Developed continuous integration pipelines to automate jet substructure software validation.
- Finalized measurements of jet substructure observables in high transverse momentum environments.
-
2018.04 - 2022.09 Zurich, Switzerland
Postdoctoral Researcher
ETH Zurich
Higgs measurements in the boosted regime and jet substructure leadership.
- Key contributor to the Higgs boson measurement in the ttH(bb) channel (boosted regime).
- Led jet substructure measurements in different high transverse momentum jet topologies.
- Supervised and mentored graduate and undergraduate students on jet and heavy-flavour identification.
- Contributed to commissioning boosted taggers and pileup mitigation for Run 3.
-
2013.06 - 2018.03 New Brunswick, USA
Graduate Research Assistant
Rutgers University
Search for pair-produced dijet resonances and trigger development.
- Primary analyst for search of pair-produced dijet resonances using jet substructure techniques.
- Designed and implemented the first CMS jet substructure triggers.
- Supervised and mentored undergraduate, high school, and REU student projects.
Education
Awards
- 2026.01.01
2026 Junior CMS LPC Distinguished Researcher
LHC Physics Center at Fermilab
Recognizes and supports early-career researchers conducting independent research at the LPC.
- 2025.04.01
Breakthrough Prize in Fundamental Physics
Breakthrough Prize Foundation
Awarded for significant contributions to the understanding of the Higgs boson within the CMS Collaboration.
- 2016.04.01
Student Travel Award
American Physical Society (APS) - DPF
Travel fellowship to present contributions to paired dijet resonance searches.
- 2012.06.01
CERN Summer Student Fellowship
CERN
Selected for prestigious summer student research program on Higgs decay channels.
- 2011.11.01
Visitor Undergraduate Scientist Fellowship
LHC Physics Center at Fermilab
Fellowship to conduct undergraduate research on heavy scalar bosons.
Certificates
| Google Data Analytics Professional Certificate | ||
| Coursera, Google | 2022-03-01 |
| Deep Learning Specialization | ||
| Coursera, DeepLearning.AI | 2022-01-20 |
| Specialization in Enology (Winemaking) | ||
| Euroinnova Business School | 2022-01-01 |
| Sport Performance Analytics Specialization | ||
| Coursera, University of Michigan | 2021-09-01 |
Skills
| Programming Languages | |
| Python | |
| C++ | |
| Bash | |
| SQL | |
| R | |
| LaTeX |
| Tools & Technologies | |
| Git / GitLab CI/CD | |
| Docker | |
| Kubernetes | |
| Snakemake | |
| REANA | |
| Jupyter Notebooks | |
| Pandas / NumPy / Scikit-learn |
| Research & Methods | |
| Experimental High-Energy Physics | |
| Data Analysis & Visualisation | |
| Machine Learning | |
| Workflow Orchestration & Reproducibility |
Languages
| Spanish | |
| Native speaker |
| English | |
| Fluent |
| German | |
| Basic |
| Italian | |
| Basic |
| French | |
| Basic |
Interests
| Physics & Computing | |
| Higgs & Jet Physics | |
| Workflow Preservation | |
| Analysis Reproducibility |