Senior Planner

Southern Water; England; Hybrid; GBP 55,000 - 85,000; Full time

Benefits offered by this job

Company bonus

Generous pension

Life assurance

Health benefits

Volunteer days

28 days annual holiday

Career development support

Job summary

Southern Water is seeking a Senior Planner to shape the delivery of major infrastructure projects in the Major Projects PMO. You will develop and manage fully logic-linked schedules in Primavera P6, providing accurate data, early warnings, and scenario modelling to keep projects on track.

Lead schedule governance, coordinate with external partners, and maintain baselines under PMO governance to drive value for communities.

Qualifications

• Expert user of Primavera P6 with cost and resource loading.
• Experience linking schedules and managing baselines.
• Ability to communicate schedule risks and mitigations.

Responsibilities

• Develop, maintain, and manage fully logic-linked project schedules in Primavera P6.
• Communicate critical path updates and schedule slippage early warnings.
• Produce progress updates, lookahead schedules, S-Curves, SPI metrics.
• Conduct scenario planning to support risk mitigation strategies.
• Review schedules from external partners and ensure governance compliance.

Skills

Primavera P6

Critical path analysis

What-if scenario planning

Schedule governance

Tools

Primavera P6

Job description

# Southern Water## Senior PlannerApply: FALMER: Posted Today: End Date: November 12, 2026 (13 days left to apply): JR7592**Closing Date**2026-09-14**Job Title:** Major Projects PMO Senior Planner**Location:** Falmer, Brighton - Hybrid working (2 days in the office)**Contract Type:** Permanent**Hours:** 37 hours**Salary:** to be discussed at screening stageAre you ready to shape the delivery of major infrastructure projects through expert planning and scheduling?**About the role**Our Major Projects team is at the heart of delivering critical programmes that transform our business and communities. As a **Major Projects PMO** **Senior Planner**, you’ll play a strategic role in developing and managing detailed project schedules, providing accurate data, early warnings, and scenario modelling to keep projects on track. This is your opportunity to influence outcomes, optimise delivery, and work on projects that truly matter.**What you will be responsible for:*** Develop, maintain, and manage fully logic-linked project schedules in Primavera P6 for major infrastructure projects.* Communicate critical path updates, float trends, and early warnings on schedule slippage.* Produce progress updates, lookahead schedules, S-Curves, and Schedule Performance Index (SPI) metrics at project and work pack level.* Conduct scenario planning and “what-if” analysis to support risk mitigation strategies.* Review and integrate schedules from external partners, ensuring quality and compliance with governance standards.* Maintain rigorous control over schedule baselines and revisions in line with PMO governance processes.**Additional Requirements:*** Expert user of Primavera P6 with advanced skills including cost and resource loading.* Familiarity with NEC contracts and key planning clauses.Southern Water is at the forefront of transforming Britain’s water industry, investing significantly to enhance resilience, sustainability, and service excellence. With £7.8bn planned investment for 2025-30, this is an unparalleled opportunity to join a business committed to delivering a generational shift in the way water services are managed.You will be joining at a time of significant change, working alongside a highly skilled leadership team with a clear vision for the future. We offer an environment where senior professionals can make a meaningful impact, influence major strategic decisions, and drive long-term value creationWe understand that great talent comes in many forms. If this role excites you and you share our commitment to delivering sustainable solutions for our communities, please apply—even if your experience doesn’t perfectly match every requirement. We’ll support your growth and development.If this role isn’t quite what you’re looking for but are keen to be contacted about opportunities at Southern Water, you can register your details here: Introduce Yourself (myworkdaysite.com- Introduce Yourself)**Our Commitment to Diversity**We welcome applicants from all backgrounds, identities, and experiences. We do not discriminate based on race, ethnicity, gender, sexual orientation, age, disability, religion, or any other protected characteristic. If you need reasonable adjustments during the recruitment process, please let us know.**Additional information:**In line with Southern Water’s security requirements, successful candidates will be required to provide evidence of their identity, eligibility to work in the UK, criminal record check (DBS) and verification of their employment and/or education history for the past three years.Appointment to this role is subject to the successful completion of all preemployment checks, including security vetting.Please note that if a candidate does not meet the required security standards or fails to pass the vetting process, Southern Water reserves the right to withdraw the offer of employment. Some positions may also require higher levels of security vetting, which may involve providing additional documentation. #LI-HM2#LI-Hybrid### Interested in the role?* We reserve the right to close this advertisement early if we receive a high volume of suitable applications, so if you are interested in the position please do send your application over today to ensure consideration.* We truly appreciate every application. Please note, that due to the volume of interest, we may not be able to provide personalised feedback to all applicants.### Our Benefits* Company and performance-related bonus* Generous pension* Life assurance payment equal to four times your annual salary* Health benefits through a Cash Plan* Two paid community volunteering days a year* 28 days annual holiday* Occupational health service* Retail discount app* We offer competitive maternity leave, and flexible return to work options### Everybody Welcome* We value diversity and are committed to providing an inclusive and accessible recruitment process. If you require any reasonable adjustments to facilitate your participation in the recruitment process, please do not hesitate to let us know.### Need flexibility in your work?* Does this opportunity excite you but you’re not 100% sure if you meet all the requirements for the role? Or are you concerned that ‘normal’ office hours aren’t possible given your personal circumstances? Whilst we can’t accommodate every flexible working request, we’ll try to find a practical solution. So why not engage with us and find out more about this role?