Engineering Team
| Name | Role | Institution | Responsibility |
| Project Executive | |||
| Gavin Dalton | Principal Investigator | STFC (RAL) | Project Executive |
| José Alfonso López Aguerri | National co-PI | IAC | Project Executive |
| Piercarlo Bonifacio | National co-PI | GEPI (Observatoire de Paris) | Project Executive |
| Scott Trager | Project Scientist, National co-PI | University of Groningen | Project Executive |
| Don Carlos Abrams | Project Manager | ING | Project Executive |
| Antonella Vallenari | National PI | INAF | Project Executive |
| Esperanza Carrasco | National PI | INAOE | Project Executive |
| Arūnas Kučinskas | National PI | Vilnius University | Project Executive |
| Support to Executive | |||
| Chris Benn | Instrument Scientist | ING | |
| Juan José Herrera | Project Support Office Manager | ING | |
| Shoko Jin | Deputy Project Scientist | University of Oxford / University of Groningen | |
| Instrument Scientist Group | |||
| Cecilia Fariña | OISMT | ING | |
| Lilian Domínguez | OISMT | ING | |
| Fibre Positioner System | |||
| Ian Lewis | System Manager/WPM | University of Oxford | Fibre Positioner |
| Andy Ridings | Work Package Manager | ING | Non-science detectors |
| David Terrett | Work Package Manager | STFC (RAL) | Fibre Positioner (software) |
| Gavin Dalton | Principal Investigator | STFC (RAL) | Project Executive |
| Kevin Dee | Work Package Manager | ING | Handling Equipment |
| Matthew Brock | Team Member | University of Oxford | POS Lead Mechanical Designer |
| Roberto Martínez | Team Member | ING | A&G Camera Support |
| Sarah Hughes | Team Member | University of Oxford | Fibre Positioner |
| Scott Trager | Work Package Manager | NOVA (University of Groningen) | Large IFU |
| Fibre System | |||
| Elisabetta Caffau | Team Member | GEPI (Observatoire de Paris) | Test data processing |
| Gilles Fasola | Team Member | GEPI (Observatoire de Paris) | Optical testing |
| Johan Pragt | Team Member | NOVA (ASTRON) | LIFU mechanical engineer |
| Marc Verheijen | Team Member | University of Groningen | mIFU design |
| Piercarlo Bonifacio | Team Member | GEPI (Observatoire de Paris) | Project management and data processing |
| Rik ter Horst | Team Member | NOVA (ASTRON) | LIFU and mIFU design |
| Scott Trager | Work Package Manager | NOVA (University of Groningen) | mIFU WP manager |
| David Horville | Team Member - Now retired | GEPI (Observatoire de Paris) | Optics |
| Two-degree Prime Focus | |||
| Kevin Dee | Work Package Manager | ING | Prime Focus Corrector |
| Jose Alonso Burgal | Team Member | IAC | Mechanical Engineer |
| José Miguel Delgado | Work Package Manager | IAC | IAC Control Software & Hardware |
| José Miguel Herreros | Team Member | IAC | IAC Project Manager |
| Neil O'Mahoney | Team Member | ING | Optics |
| Tibor Agocs | Team Member | ESTEC | PFC Optical Design |
| WEAVE Observatory Control System | |||
| Sergio Picó | System Manager | ING | Software |
| Andrea Baruffolo | Work Package Manager | INAF | Observatory Control System |
| Bernardo Salasnich | Team Member | INAF | Observatory Control System |
| Carlos Martín | Team Member | ING | Control Systems |
| Chris Mottram | Team Member | LJMU | Detector readout (software) |
| David Terrett | Work Package Manager | STFC (RAL) | Fibre Positioner (software) |
| Diego Cano | Work Package Manager | ING | Control Systems |
| Emanuel Gafton | Team Member | ING | Observatory Control System |
| Frank Gribbin | Team Member | ING | TCS upgrades |
| Iain Steele | Work Package Manager | LJMU | Sci. Detectors, Calibration and QL softw. |
| José Miguel Delgado | Team Member | IAC | Control system electronics |
| Jose Miguel Herreros | Work Package Manager | IAC | Control system electronics |
| Spectrograph System | |||
| Remko Stuik | System Manager | NOVA (Leiden Observatory) | Spectrograph |
| Andrea Bianco | Team Member | INAF | VPH Gratings |
| Chris Mottram | Team Member | LJMU | Detector readout (software) |
| Eddy Elswijk | Team Member | NOVA (ASTRON) | MAIV and quality engineer |
| Esperanza Carrasco | Team Member | INAOE | Optical Engineer |
| Iain Steele | Work Package Manager | LJMU | Sci. Detectors, Calibration and QL softw. |
| Ian Tosh | Work Package Manager - Now retired | STFC (RAL) | Spectrograph Optics |
| Jan Kragt | Team Member | NOVA (ASTRON) | Spectrograph (mechanical) |
| Menno Schuil | Team Member | NOVA (ASTRON) | Mechanical production |
| Niels Tromp | Team Member | NOVA (ASTRON) | Mechanical Design |
| Ramón Navarro | Work Package Manager | NOVA (ASTRON) | Spectrograph |
| Johan Pragt | Team Member | NOVA (ASTRON) | Spectrograph System |
| Roberto Martínez | Team Member | ING | Camera Support |
| Scott Trager | Team Member | University of Groningen | NL PI |
| Stuart Bates | Team Member | LJMU | Science Detectors (mechanical) |
| Core Processing System | |||
| Nicholas Walton | System Manager | CASU | Data Analysis Management |
| Alireza Molaeinezhad | Team Member | CASU | CPS Developer |
| Catrina Diener | Team Member | CASU | CPS Developer |
| Clare Worley | Team Member | CASU | Interfaces with science users and with APS team |
| David Murphy | Team Member | CASU | Data Management |
| Giuseppe D’Ago | Team Member | CASU | QL Pipeline |
| Jim Lewis | Team Member | CASU | Lead developer for the CPS |
| Mike Irwin | Work Package Manager | CASU | Data Analysis, Management |
| Sarah Hughes | Team Member | CASU | Catalogues/End-user DM |
| Thomas Hajnik | Team Member | CASU | Bright star and non-standard spectral processing lead |
| Tristan Whitmarsh | Team Member | CASU | QL Pipeline |
| WHT Support Facilities | |||
| Amado Guillén | Team Member | ING | Electronics |
| David González | Team Member | ING | Mechanical |
| Diego Cano | Work Package Manager | ING | Control Systems |
| Kevin Dee | Work Package Manager | ING | Handling Equipment |
| Neil O'Mahony | Team Member | ING | Optics |
| Servando Rodríguez | Team Member | ING | Mechanical |
| Advanced Processing System | |||
| Carlos Allende | System Manager | IAC | Data Analysis Software |
| Alireza Molaeinezhad | Team Member | IAC | Data Analysis Software |
| J. Alfonso Lopez Aguerri | Team Member | IAC | ES PI |
| WEAVE Archive System | |||
| Marcello Lodi | System Manager | TNG | Data Archive |
| Antonella Vallenari | Team Member | INAF | IT PI |
| Daniela Bettoni | Team Member | INAF | Archive Consultant |
| Emilio Molinari | Work Package Manager | TNG | Data Archive |
| Jose Guerra | Team Member | TNG | Data Archive |
| José San Juan | Team Member | TNG | Software Engineer |
| Nauzet Hernandez | Team Member | TNG | Software Engineer |