Alternance - Assistant(e) Project Manager (F/H)

Posted 2 Days Ago
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Marseille, Bouches-du-Rhône, Provence-Alpes-Côte d'Azur, FRA
In-Office
Entry level
Security • Cybersecurity
The Role
Supports the project manager in coordinating nuclear engineering activities and achieving quality, cost, and schedule objectives. Responsibilities include preparing tenders, cost estimation, technical proposals, execution planning, risk analysis, technical and financial progress tracking, engineer workload monitoring, procurement and subcontractor follow-up, quality process implementation under ISO 9001 and ISO 19443, and project audits. The role is based in Aix-en-Provence and requires Bac+5 alternance study and C1-level English.
Summary Generated by Built In

Informations générales – Entité

Amentum Clean Energy France SAS, filiale Française du Groupe Amentum, s’appuie sur son expérience et son expertise en matière de conception, exploitation et maintenance des infrastructures nucléaires afin de répondre au plus près aux besoins de ses clients. 

Amentum France accompagne ses clients sur l’ensemble du cycle de vie d’une installation nucléaire, du support à la construction ou au licensing jusqu’au démantèlement, en passant par le support au parc en exploitation (modifications, augmentation de durée de vie, amélioration du niveau de sûreté, …).

Bénéficiant de deux bureaux stratégiquement implantés à Aix-en-Provence et à Paris, ses collaborateurs se composent d’ingénieurs et de cadres de haut niveau.


Description du poste

Dans le cadre de votre mission, vous participez à la coordination et à la supervision des activités d’ingénierie liées à votre périmètre d’intervention. Sous la responsabilité du chef de projet, vous intervenez dans la réalisation des activités nécessaires à l’atteinte des objectifs qualité, coûts et délais sur le(s) projet(s) qui vous sont confiés.

Vos principales missions seront axées sur :

  • Participer à la préparation et au suivi des appels d’offres
  • Réaliser le chiffrage et contribuer à la rédaction des offres techniques
  • Participer à l’élaboration des plannings d’exécution et à l’analyse des risques
  • Assurer le suivi de l’avancement technique et financier des projets
  • Participer au suivi et à la mise à jour des plannings projets
  • Développer les compétences en gestion de projet
  • Participer à la gestion des risques et au suivi de la charge des ingénieurs
  • Participer aux activités achats : sélection des fournisseurs, contractualisation et suivi des sous-traitants
  • Assurer la mise en œuvre des processus qualité ISO 9001 et 19443 sur les projets
  • Participer aux audits projets

Profil recherché

Vous préparez un diplôme de niveau Bac+5 en alternance

Vous êtes doté(e) d’une forte sensibilité technique et d’une forte rigueur en gestion des projets.

Vos capacités d’analyse et de synthèse sont confirmées.

Vous bénéficiez d’une première expérience en management et d’un excellent relationnel.

Une bonne maîtrise de l'anglais est indispensable pour ce poste (niveau C1 CECRL a minima).

 

Localisation du poste

• Ville : Aix-en-Provence (Bouches-du-Rhône)


Critères candidat

• Niveau d’études minimum requis : Bac +2 et plus

       

Compensation Details:

Amentum France Compensation Package

       

The compensation range or hourly rate listed for this position is provided as a good-faith estimate of what the company intends to offer for this role at the time this posting was issued. Actual compensation may vary based on factors such as job responsibilities, education, experience, skills, internal equity, market data, applicable collective bargaining agreements, and relevant laws.


Benefits Overview:

Our health and welfare benefits are designed to support you and your priorities. Offerings include:

  • Health, dental, and vision insurance

  • Paid time off and holidays

  • Retirement benefits (including 401(k) matching)

  • Educational reimbursement

  • Parental leave

  • Employee stock purchase plan

  • Tax-saving options

  • Disability and life insurance

  • Pet insurance


Note: Benefits may vary based on employment type, location, and applicable agreements. Positions governed by a Collective Bargaining Agreement (CBA), the McNamara-O'Hara Service Contract Act (SCA), or other employment contracts may include different provisions/benefits.

       

Original Posting:

10/02/2026 - 11/30/2026

Amentum anticipates this job requisition will remain open for at least three days, with a closing date no earlier than three days after the original posting. This timeline may change based on business needs.

       

Amentum is proud to be an Equal Opportunity Employer. Our hiring practices provide equal opportunity for employment without regard to race, sex, sexual orientation, pregnancy (including pregnancy, childbirth, breastfeeding, or medical conditions related to pregnancy, childbirth, or breastfeeding), age, ancestry, United States military or veteran status, color, religion, creed,  marital or domestic partner status, medical condition, genetic information, national origin, citizenship status, low-income status, or mental or physical disability so long as the essential functions of the job can be performed with or without reasonable accommodation, or any other protected category under federal, state, or local law. Learn more about your rights under Federal laws and supplemental language at Labor Laws Posters.

Skills Required

  • Prepare a Bac+5 degree through an alternance program
  • Minimum education level of Bac+2 or higher
  • Strong technical aptitude and rigor in project management
  • Confirmed analytical and synthesis skills
  • Initial management experience
  • Excellent interpersonal skills
  • English proficiency at CEFR C1 level or higher

Amentum Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Amentum and has not been reviewed or approved by Amentum.

  • Healthcare Strength — Healthcare offerings are described as comprehensive, with medical, dental, and vision plans and multiple PPO/HSA options. Mental health support via an employee assistance program and other wellness resources is also included in the benefits mix.
  • Retirement Support — Retirement support is positioned as a meaningful part of total rewards through a 401(k) plan with employer matching. Profit-sharing contributions and immediate or near-term vesting in some cases further strengthen the retirement value proposition.
  • Leave & Time Off Breadth — Time-off benefits are presented as solid for the sector, including tiered PTO accrual by tenure and a set of paid holidays. Role-dependent flexible or remote work options and leave programs add to perceived work-life support.

Amentum Insights

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The Company
HQ: Chantilly, VA
18,261 Employees

What We Do

Amentum is a premier global technical and engineering services partner supporting critical programs of national significance across defense, security, intelligence, energy, and environment. We draw from a century-old heritage of operational excellence, mission focus, and successful execution underpinned by a strong culture of safety and ethics. Headquartered in Germantown, Md., we employ more than 20,000 people in 48 states and 28 foreign countries and territories. Visit us at amentum.com to explore how we deliver excellence for our customers’ most vital missions.

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