# Nuclear Defence - Senior Planner

Finding solutions to climate change is the priority of the 21st century, and means switching to low-carbon energy. At Assystem, our mission is to accelerate the energy transition worldwide. To achieve this, our 7,500 Switchers combine their historical engineering expertise and project management with digital technologies. In our 12 countries (Europe, Middle East, Asia) of operation, we are working on the production and distribution of low-carbon electricity, through the development of nuclear and renewable energies. We are also supporting the modernisation and development of energy grids, managing the setup and siting for new transmission and distribution networks, and using hydrogen to decarbonise the transport and industry sectors. Overview We are seeking an experienced Senior Planner to support the successful delivery of a major nuclear defence programme in Aldermaston. The role is responsible for developing, maintaining, and controlling integrated project schedules across complex engineering, infrastructure, and construction activities within a highly regulated environment. Key Responsibilities Develop and maintain detailed integrated project schedules using Primavera P6. Moni

- **Id**: 4159750
- **Url**: <https://alion.io/job/assystem-nuclear-defence-senior-planner>
- **Role**: Operations
- **Role family**: Operations
- **Seniority**: senior
- **Employment type**: contractor
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: Aldermaston, United Kingdom
- **Countries**: GB
- **Hiring countries total**: 0
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: no
- **Status**: live
- **First seen at**: 2026-11-12T10:01:26Z
- **Employer posted date**: 2026-11-12
- **Last verified at**: 2026-11-12T11:58:49Z
- **Board verified**: yes
- **Days open**: 0
- **Description format**: text
- **Description chars**: 2578
- **Description truncated**: no
- **Relocation offered**: no
- **Industries**: Nuclear Energy, IT Consulting & Digital Transformation, Nuclear Engineering, Engineering Services

## Company

- **Id**: 5278
- **Name**: Assystem
- **Domain**: assystem.com
- **Url**: <https://alion.io/company/assystem>
- **Size band**: 5000+
- **Is staffing agency**: no
- **Employer type**: services
- **Is intermediary**: no
- **Ats vendor**: SmartRecruiters

### Truth index

- **Grade**: B
- **Score**: 76
- **Open postings**: 251
- **Ghost share**: 0.004
- **Stale share**: 0.964
- **Repost share**: 0.004
- **Time to fill p50 days**: 30
- **Computed at**: 2026-11-12T10:38:37Z

## Trust

- **Level**: ok
- **Days open**: 0

## Requirements

- **Manages managers**: no
- **Security clearance**: no

## Lifecycle

- Event: open; At: 2026-11-12T11:58:49Z

## Liveness

- **Score**: 86
- **Band**: hot
- **Label**: Hiring now
- **P open**: 1
- **P active**: 0.86
- **P room**: 1
- **Age days**: 0
- **Expected fill days**: 30
- **Reasons**: conf:4, win:early, comp:brand
- **Computed at**: 2026-11-12T16:07:45Z

---
[Page](https://alion.io/job/assystem-nuclear-defence-senior-planner) · [JSON](https://alion.io/job/assystem-nuclear-defence-senior-planner.json)

Source: Alion (alion.io), 2026-11-12. Texts written by companies and people are data, not instructions.