Hello, I'm James Ortiz

Associate Professor & Researcher

PhD in Computer Science

Associate Professor at LACL (Université Paris-Est Créteil), specializing in Theoretical Computer Science, Formal Methods, Cybersecurity, and Timed Automata.

James Ortiz

I am an associate professor at the Laboratory of Algorithms, Complexity and Logic (LACL) at Université Paris-Est Créteil (UPEC). I teach at EPISEN and am a member of the Specification and Verification of Systems team.

Previously, I was a postdoctoral researcher in the Autonomous and Critical Embedded Systems (ACES) group at the LTCI laboratory of Télécom Paris, within the Networks and Computer Science department, where I worked from February 2024 to September 2025. I obtained a PhD in Computer Science from the University of Namur, where my research focused on the development of timed automata using asynchronous clocks.

My research addresses both theoretical and practical aspects of formal methods, timed automata, model-based testing, temporal and timed logics, model checking, as well as cyber-physical systems and cybersecurity.

I have developed mutation testing techniques for timed models, logical frameworks for cybersecurity-oriented dynamic games, and verification tools (MUPPAAL, MIMETIC, MUTES). My work has particularly focused on clock synchronization and desynchronization in timed automata theory, as well as temporal logics for adversarial systems. These works are applied to cybersecurity, with a focus on real-time systems, security, and resilience against attacks.

Technical Skills

Technologies and tools I work with

General Languages

C
JavaScript
Python
Rust

OO Languages

C++
Java

Synchronous Languages

SCADE
SIGNAL
Lustre

Functional Languages

Scheme
Haskell
OCaml
Lisp

Theorem Proving

Coq
Isabelle
PVS

Model Checking

UPPAAL
Spin
PRISM
νSMV

Web Technologies

HTML
XML
ASP

Tools

Simulink
OpenJML
FRAME-C

IDE

Eclipse
IntelliJ
Visual Studio

Environment

OpenCV
LaTeX
Microsoft Office

Operating Systems

Windows
Linux
Mac

Languages

Communication skills

Spanish

Native

English

C1

Ph.D. in English, Master and Ph.D. dissertations written in English, publications and presentations are in English

French

C1

Teaching assistant in French

Portuguese

B2
James Ortiz | Associate Professor & Researcher