Founded in 1985, OPTEC is the Italian firm reference leader in optical, optoelectronic and optomechanical sector. Optec designs, manufactures and certify diffraction limited optical payloads, multichannel camera systems for Space, focus mechanism with remote control and every kind of optical system from UV, passing through Visible and coming to InfraRed range. OPTEC has delivered, after having successfully performed the qualification campaign, the polarimeter for the ESA Solar Orbiter METIS project, the ARGOMOON flight optical payloads, as part of NASA Artemis 1 Mission, the first challenging ride to the Moon ! Optec has also built the Diffraction Limited Telescope for LICIA Cube, part of NASA DART (Double Asteroid Redirection Test) Mission, successfully deployed grabbing images of the impact between a spacecraft and an asteroid on a collision course with Earth. We have delivered and tested three RSA6061 off-axis aspherical mirrors that will work at 110 Kelvin (-163°C) and that have been mounted in JUICE (Jupiter Icy moons Explorer). We are also officially part of IRIDE, the new Italian EO constellation.