{"id":4174605,"url":"https://alion.io/job/ultra-mastermind-responsable-rh-hf","title":"Responsable RH H/F","company":{"id":4536015,"name":"Ultra","domain":"ultra-mastermind.com","url":"https://alion.io/company/ultra-mastermind","size_band":"1-10","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Welcome to the Jungle","truth_index":null},"role":"HR","role_family":"HR","seniority":"staff","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["La Defense, France"],"countries":["FR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[],"status":"live","first_seen_at":"2026-11-10T14:39:40Z","employer_posted_date":"2026-11-12","last_verified_at":"2026-11-13T18:18:27Z","board_verified":true,"closed_at":null,"days_open":3,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":3},"description":"Rejoignez ULTRA, une entreprise en forte évolution. En tant que Responsable Ressources Humaines, vous serez en charge de structurer, piloter et sécuriser l'ensemble de la fonction RH. Vous travaillerez en étroite collaboration avec la Direction générale et la Direction Talent Acquisition. Votre mission consistera à sécuriser les sujets RH, sociaux, contractuels et administratifs, tout en accompagnant la montée en maturité de l'organisation. Vous aurez un rôle central dans la fiabilisation des pratiques, la prévention des risques et l'alignement des processus RH avec les besoins de croissance de l'entreprise.\nMissions\nConcevoir, formaliser et déployer des processus et outils RH simples, robustes et durables.\nAssurer le suivi administratif des collaborateurs, des contrats et des obligations sociales avec rigueur.\nSuperviser et fiabiliser les sujets de paie, de conformité et d’obligations légales, en lien avec les interlocuteurs internes et externes.\nProfil recherché\nFormation supérieure en droit social, ressources humaines, administration du personnel ou paie ; un Bac +5 est fortement apprécié.\n\n5 à 10 ans d’expérience confirmée dans une fonction comparable, avec une forte autonomie dans l’exécution.\n\nExcellente maîtrise du droit du travail français, des contrats de travail, des périodes d’essai, des procédures disciplinaires et des ruptures.\n\nExpérience concrète en administration du personnel et en production ou supervision technique de paies françaises.\n\nCapacité à lire, contrôler et sécuriser les enjeux de cotisations, de charges, de coût employeur et de masse salariale.\n\nTrès bonne maîtrise des outils RH et paie, avec une attention forte à la qualité documentaire, aux délais et à la conformité.\n\nRigueur, sens de l’organisation, confidentialité, autonomie et intelligence relationnelle pour accompagner des sujets parfois sensibles.\n\nDisponibilité immédiate pour prendre le poste et accompagner la transition vers une société française à partir de janvier 2027.","description_format":"text","description_chars":1992,"description_truncated":false,"requirements":{"experience_years_min":10,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"French","level":"Advanced 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