Ivan Marisca

CTO at GraphSight
Researcher at USI

Languages

Italian (Native)
English (Professional)
French (Basic)
Spanish (Basic)


About me I am CTO of GraphSight, a Swiss startup that provides AI-powered graph-based forecasts for renewable energy systems. I recently completed my Ph.D. in the Graph Machine Learning Group at IDSIA and Università della Svizzera italiana (USI) in Lugano (Switzerland), under the supervision of Prof. Cesare Alippi. I was also part of the ELLIS Ph.D. program, jointly supervised by Prof. Alippi and Prof. Michael Bronstein. Previously, I earned my BSc (2017) and MSc (2020) in Computer Science and Engineering from Politecnico di Milano (Italy). I have been a visiting researcher at the University of Oxford with Prof. Bronstein and at UiT The Arctic University of Norway (Tromsø) with Prof. Filippo Maria Bianchi. My research focuses on graph deep learning for irregular spatiotemporal data. I'm interested in the application of graph-based methods in problems regarding data coming from sensor networks, like imputation, filtering, and prediction of irregularly sampled observations. Education Ph.D. in Informatics 2020 — 2025 Università della Svizzera italiana (USI) Ph.D. graduate from IDSIA and Università della Svizzera italiana (USI), where I was supervised by Prof. Cesare Alippi. Research visit Mar 2024 — Aug 2024 University of Oxford 6-month research visit within the group of Prof. Michael Bronstein. MSc in Computer Science and Engineering 2017 — 2020 Politecnico di Milano Master’s degree with honors (110/110L), defending a thesis on machine learning. During the two years of studies, I mostly attended AI-oriented courses. Exchange Sep 2018 — Jan 2019 Universitat Politècnica de València During the semester spent abroad – in Valencia – within the Erasmus program, I attended Spanish and English courses on programming, robotics and AI. BSc in Engineering of Computing Systems 2014 — 2017 Politecnico di Milano The course program covered general topics of engineering and computer science. High School in Mathematics 2009 — 2014 Liceo C. Caminiti (IT) High school diploma with a specific focus in mathematics and science. Academic activities Teaching Advanced Topics in Machine Learning (TA) – MSc at USI Sep 2024 — Jan 2025 MSc at USI Guest lecturer, teaching assistant, and tutor for team projects. Advanced Topics in Machine Learning (TA) – MSc at USI Sep 2023 — Jan 2024 MSc at USI Teaching assistant, involved in course organization, lecture preparation and student tutoring. Graph Deep Learning (TA) – MSc at USI Feb 2023 — Jun 2023 MSc at USI Lectures design and students tutoring on team projects. Advanced Topics in Machine Learning (TA) – MSc at USI Sep 2022 — Jan 2023 MSc at USI Students tutoring for projects on reproducibility. Graph Deep Learning (TA) – MSc at USI Feb 2022 — Jun 2022 MSc at USI I gave a lecture on Spatiotemporal Graph Neural Networks and tutored students on projects. Introduzione all’Intelligenza Artificiale e ML (TA) – MSc at USI Sep 2021 — Jan 2022 MSc at USI Course on AI and ML delivered in Italian for high school teachers. Machine Learning (TA) – BSc at USI Feb 2021 — Jun 2021 BSc at USI Lab sessions on practical aspects and show how to design machine learning solutions to real-world problems. Supervised students Valentina Moretti, MSc at USI and Politecnico di Milano 2024 Quasi-stateful RNNs with Truncated Back-propagation Through Time. Simone Mugnai, MSc at USI and University of Bologna 2024 Graph-based Imputation and Smoothing for Forecasting with Missing Data. Marco Latella, MSc at USI and University of Milano-Bicocca 2022 Graph Representation Learning for Multi-site Photovoltaic Energy Production. Talks Invited talk at University of Oxford May 2024 Talk on graph deep learning for irregular spatiotemporal data at the Learning on Graphs and Geometry (LoG²) seminar series. Invited talk at Baker Hughes (Virtual) Jul 2022 Seminar on time series imputation for the Baker Hughes' AI team. Spotlight talk at TGL Workshop (New Orleans) Dec 2022 Presenting the paper Scalable Spatiotemporal Graph Neural Networks at the Temporal Graph Learning Workshop at NeurIPS 2022. Tutorial at LoG Conference (Virtual & Siena, Italy) Nov 2024 Presentation of the tutorial Graph Deep Learning for Time Series Processing with Andrea Cini and Daniele Zambon. (📹 Video) Tutorial at ECML/PKDD (Turin) Sep 2023 Presentation of the tutorial Graph Deep Learning for Spatiotemporal Time Series with Andrea Cini and Daniele Zambon. Reading group presentation at TGL reading group (Virtual) Feb 2024 Presenting the paper Taming Local Effects in Graph-based Spatiotemporal Forecasting at the Temporal Graph Learning Reading Group. (📹 Video) Reading group presentation at TGL reading group (Virtual) Apr 2023 Presenting the paper Scalable Spatiotemporal Graph Neural Networks at the Temporal Graph Learning Reading Group. Poster presentation at NeurIPS (New Orleans) Dec 2023 Presenting Taming Local Effects in Graph-based Spatiotemporal Forecasting at the 37th Conference on Neural Information Processing Systems. Poster presentation at AAAI (Washington D.C.) Feb 2023 Presenting Scalable Spatiotemporal Graph Neural Networks at the 37th AAAI Conference on Artificial Intelligence. Poster presentation at NeurIPS (New Orleans) Nov 2022 Presenting Learning to Reconstruct Missing Data from Spatiotemporal Graphs with Sparse Observations at the 36th Conference on Neural Information Processing Systems. Poster presentation at ICLR (Virtual) Apr 2022 Presenting Filling the G_ap_s: Multivariate Time Series Imputation by Graph Neural Networks at the 10th International Conference on Learning Representations. Abstract presentation at MLDM (Virtual) Nov 2021 Presenting the abstract "Multivariate Time Series Imputation by Graph Neural Networks" at the 10th Italian Workshop on Machine Learning and Data Mining. Awards & Scholarships Doctoral Mobility grant — Università della Svizzera italiana Dec 2023 Grant of CHF 20’000 (≈$23K) for a 6-month research stay at University of Oxford to work with Prof. Michael Bronstein's group. Travel Award — NeurIPS Dec 2023 Travel award to attend the NeurIPS conference in New Orleans (US). Best Paper Award — Temporal Graph Learning Workshop @ NeurIPS Dec 2022 For the paper Scalable Spatiotemporal Graph Neural Networks. Travel Award — NeurIPS Nov 2022 Travel award to attend the NeurIPS conference in New Orleans (US). Scholarship — National Association SAPAR 2019 Scholarship awarded to the top-4 students in STEM subjects. Scholarship — Politecnico di Milano 2019 Reduced tuition for high merits. Program Committee Member Journals Journal of Machine Learning Research (JMLR) — IEEE Transactions on Neural Networks (TNNLS) — Neural Networks. Conferences Advances in Neural Information Processing Systems (NeurIPS) — International Conference on Machine Learning (ICML) — International Joint Conference on Neural Networks (IJCNN). Publications What Matters in Deep Learning for Time Series Forecasting? Valentina Moretti , Andrea Cini , Ivan Marisca , Cesare Alippi Preprint, 2025 Torch Geometric Pool: the Pytorch library for pooling in Graph Neural Networks Filippo Maria Bianchi , Carlo Abate , Ivan Marisca Preprint, 2025 Over-squashing in Spatiotemporal Graph Neural Networks Ivan Marisca , Jacob Bamberger , Cesare Alippi , Michael M. Bronstein To appear in Advances in Neural Information Processing Systems, 2025 PeakWeather: MeteoSwiss Weather Station Measurements for Spatiotemporal Deep Learning Daniele Zambon ^* , Michele Cattaneo ^* , Ivan Marisca , Jonas Bhend , Daniele Nerini , Cesare Alippi Preprint, 2025 Graph-based Forecasting with Missing Data through Spatiotemporal Downsampling Ivan Marisca , Cesare Alippi , Filippo Maria Bianchi International Conference on Machine Learning, 2024 Graph Deep Learning for Time Series Forecasting Andrea Cini , Ivan Marisca , Daniele Zambon , Cesare Alippi ACM Computing Surverys, 2025 Taming Local Effects in Graph-based Spatiotemporal Forecasting Andrea Cini ^* , Ivan Marisca ^* , Daniele Zambon , Cesare Alippi Advances in Neural Information Processing Systems, 2023 Scalable Spatiotemporal Graph Neural Networks Andrea Cini ^* , Ivan Marisca ^* , Filippo Maria Bianchi , Cesare Alippi Proceedings of the AAAI conference on artificial intelligence, 2023 Learning to Reconstruct Missing Data from Spatiotemporal Graphs with Sparse Observations Ivan Marisca ^* , Andrea Cini ^* , Cesare Alippi Advances in Neural Information Processing Systems, 2022 Filling the G_ap_s: Multivariate Time Series Imputation by Graph Neural Networks Andrea Cini ^* , Ivan Marisca ^* , Cesare Alippi International Conference on Learning Representations, 2022 ^*Equal contribution.

About me

I am CTO of GraphSight, a Swiss startup that provides AI-powered graph-based forecasts for renewable energy systems. I recently completed my Ph.D. in the Graph Machine Learning Group at IDSIA and Università della Svizzera italiana (USI) in Lugano (Switzerland), under the supervision of Prof. Cesare Alippi. I was also part of the ELLIS Ph.D. program, jointly supervised by Prof. Alippi and Prof. Michael Bronstein. Previously, I earned my BSc (2017) and MSc (2020) in Computer Science and Engineering from Politecnico di Milano (Italy). I have been a visiting researcher at the University of Oxford with Prof. Bronstein and at UiT The Arctic University of Norway (Tromsø) with Prof. Filippo Maria Bianchi.

My research focuses on graph deep learning for irregular spatiotemporal data. I'm interested in the application of graph-based methods in problems regarding data coming from sensor networks, like imputation, filtering, and prediction of irregularly sampled observations.

Education

Ph.D. in Informatics

2020 — 2025

Università della Svizzera italiana (USI)

Ph.D. graduate from IDSIA and Università della Svizzera italiana (USI), where I was supervised by Prof. Cesare Alippi.

Research visit

Mar 2024 — Aug 2024

University of Oxford

6-month research visit within the group of Prof. Michael Bronstein.

MSc in Computer Science and Engineering

2017 — 2020

Politecnico di Milano

Master’s degree with honors (110/110L), defending a thesis on machine learning. During the two years of studies, I mostly attended AI-oriented courses.

Exchange

Sep 2018 — Jan 2019

Universitat Politècnica de València

During the semester spent abroad – in Valencia – within the Erasmus program, I attended Spanish and English courses on programming, robotics and AI.

BSc in Engineering of Computing Systems

2014 — 2017

Politecnico di Milano

The course program covered general topics of engineering and computer science.

High School in Mathematics

2009 — 2014

Liceo C. Caminiti (IT)

High school diploma with a specific focus in mathematics and science.

Academic activities

Teaching

Advanced Topics in Machine Learning (TA) – MSc at USI

Sep 2024 — Jan 2025

MSc at USI

Guest lecturer, teaching assistant, and tutor for team projects.
Advanced Topics in Machine Learning (TA) – MSc at USI

Sep 2023 — Jan 2024

MSc at USI

Teaching assistant, involved in course organization, lecture preparation and student tutoring.
Graph Deep Learning (TA) – MSc at USI

Feb 2023 — Jun 2023

MSc at USI

Lectures design and students tutoring on team projects.
Advanced Topics in Machine Learning (TA) – MSc at USI

Sep 2022 — Jan 2023

MSc at USI

Students tutoring for projects on reproducibility.
Graph Deep Learning (TA) – MSc at USI

Feb 2022 — Jun 2022

MSc at USI

I gave a lecture on Spatiotemporal Graph Neural Networks and tutored students on projects.
Introduzione all’Intelligenza Artificiale e ML (TA) – MSc at USI

Sep 2021 — Jan 2022

MSc at USI

Course on AI and ML delivered in Italian for high school teachers.
Machine Learning (TA) – BSc at USI

Feb 2021 — Jun 2021

BSc at USI

Lab sessions on practical aspects and show how to design machine learning solutions to real-world problems.

Supervised students

Valentina Moretti, MSc at USI and Politecnico di Milano

2024

Quasi-stateful RNNs with Truncated Back-propagation Through Time.
Simone Mugnai, MSc at USI and University of Bologna

2024

Graph-based Imputation and Smoothing for Forecasting with Missing Data.
Marco Latella, MSc at USI and University of Milano-Bicocca

2022

Graph Representation Learning for Multi-site Photovoltaic Energy Production.

Talks

Invited talk at University of Oxford

May 2024

Talk on graph deep learning for irregular spatiotemporal data at the Learning on Graphs and Geometry (LoG²) seminar series.
Invited talk at Baker Hughes (Virtual)

Jul 2022

Seminar on time series imputation for the Baker Hughes' AI team.

Spotlight talk at TGL Workshop (New Orleans)

Dec 2022

Presenting the paper Scalable Spatiotemporal Graph Neural Networks at the Temporal Graph Learning Workshop at NeurIPS 2022.

Tutorial at LoG Conference (Virtual & Siena, Italy)

Nov 2024

Presentation of the tutorial Graph Deep Learning for Time Series Processing with Andrea Cini and Daniele Zambon. (📹 Video)
Tutorial at ECML/PKDD (Turin)

Sep 2023

Presentation of the tutorial Graph Deep Learning for Spatiotemporal Time Series with Andrea Cini and Daniele Zambon.

Reading group presentation at TGL reading group (Virtual)

Feb 2024

Presenting the paper Taming Local Effects in Graph-based Spatiotemporal Forecasting at the Temporal Graph Learning Reading Group. (📹 Video)
Reading group presentation at TGL reading group (Virtual)

Apr 2023

Presenting the paper Scalable Spatiotemporal Graph Neural Networks at the Temporal Graph Learning Reading Group.

Poster presentation at NeurIPS (New Orleans)

Dec 2023

Presenting Taming Local Effects in Graph-based Spatiotemporal Forecasting at the 37th Conference on Neural Information Processing Systems.
Poster presentation at AAAI (Washington D.C.)

Feb 2023

Presenting Scalable Spatiotemporal Graph Neural Networks at the 37th AAAI Conference on Artificial Intelligence.
Poster presentation at NeurIPS (New Orleans)

Nov 2022

Presenting Learning to Reconstruct Missing Data from Spatiotemporal Graphs with Sparse Observations at the 36th Conference on Neural Information Processing Systems.
Poster presentation at ICLR (Virtual)

Apr 2022

Presenting Filling the G_ap_s: Multivariate Time Series Imputation by Graph Neural Networks at the 10th International Conference on Learning Representations.

Abstract presentation at MLDM (Virtual)

Nov 2021

Presenting the abstract "Multivariate Time Series Imputation by Graph Neural Networks" at the 10th Italian Workshop on Machine Learning and Data Mining.

Awards & Scholarships

Doctoral Mobility grant — Università della Svizzera italiana

Dec 2023

Grant of CHF 20’000 (≈$23K) for a 6-month research stay at University of Oxford to work with Prof. Michael Bronstein's group.
Travel Award — NeurIPS

Dec 2023

Travel award to attend the NeurIPS conference in New Orleans (US).
Best Paper Award — Temporal Graph Learning Workshop @ NeurIPS

Dec 2022

For the paper Scalable Spatiotemporal Graph Neural Networks.
Travel Award — NeurIPS

Nov 2022

Travel award to attend the NeurIPS conference in New Orleans (US).
Scholarship — National Association SAPAR

2019

Scholarship awarded to the top-4 students in STEM subjects.
Scholarship — Politecnico di Milano

2019

Reduced tuition for high merits.

Program Committee Member

Journals

Journal of Machine Learning Research (JMLR) — IEEE Transactions on Neural Networks (TNNLS) — Neural Networks.
Conferences

Advances in Neural Information Processing Systems (NeurIPS) — International Conference on Machine Learning (ICML) — International Joint Conference on Neural Networks (IJCNN).

Publications

What Matters in Deep Learning for Time Series Forecasting?
- Valentina Moretti ,
- Andrea Cini ,
- Ivan Marisca ,
- Cesare Alippi
Preprint, 2025
Torch Geometric Pool: the Pytorch library for pooling in Graph Neural Networks
- Filippo Maria Bianchi ,
- Carlo Abate ,
- Ivan Marisca
Preprint, 2025
Over-squashing in Spatiotemporal Graph Neural Networks
- Ivan Marisca ,
- Jacob Bamberger ,
- Cesare Alippi ,
- Michael M. Bronstein
To appear in Advances in Neural Information Processing Systems, 2025
PeakWeather: MeteoSwiss Weather Station Measurements for Spatiotemporal Deep Learning
- Daniele Zambon ^* ,
- Michele Cattaneo ^* ,
- Ivan Marisca ,
- Jonas Bhend ,
- Daniele Nerini ,
- Cesare Alippi
Preprint, 2025
Graph-based Forecasting with Missing Data through Spatiotemporal Downsampling
- Ivan Marisca ,
- Cesare Alippi ,
- Filippo Maria Bianchi
International Conference on Machine Learning, 2024
Graph Deep Learning for Time Series Forecasting
- Andrea Cini ,
- Ivan Marisca ,
- Daniele Zambon ,
- Cesare Alippi
ACM Computing Surverys, 2025
Taming Local Effects in Graph-based Spatiotemporal Forecasting
- Andrea Cini ^* ,
- Ivan Marisca ^* ,
- Daniele Zambon ,
- Cesare Alippi
Advances in Neural Information Processing Systems, 2023
Scalable Spatiotemporal Graph Neural Networks
- Andrea Cini ^* ,
- Ivan Marisca ^* ,
- Filippo Maria Bianchi ,
- Cesare Alippi
Proceedings of the AAAI conference on artificial intelligence, 2023
Learning to Reconstruct Missing Data from Spatiotemporal Graphs with Sparse Observations
- Ivan Marisca ^* ,
- Andrea Cini ^* ,
- Cesare Alippi
Advances in Neural Information Processing Systems, 2022
Filling the G_ap_s: Multivariate Time Series Imputation by Graph Neural Networks
- Andrea Cini ^* ,
- Ivan Marisca ^* ,
- Cesare Alippi
International Conference on Learning Representations, 2022

^*Equal contribution.