Send an e-mail at email@example.com from your ALTEN e-mail account. The following content is suggested:
I am a Recruiter at ALTEN and I'd like to post/sponsor jobs.
[your job title]
[your phone number]
Our team will verify your contact data and unblock your account if everything is correct.
Find the latest Engineering jobs & careers at ALTEN in France on OnlyEngineerJobs.fr.