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SII Group delivers Digital Services, IT, Engineering, and Consulting to diverse industries, enabling digital transformation through our commitment to Growth, People, and CSR.
With over 16,000 professionals across 21 countries, we’re recognised as a “Great Place to Work” for fostering a high-trust culture. Our core values of Trust, Transparency, and Quality drive our work package delivery, ensuring we meet and exceed client expectations as a committed partner.
Since 2016, SII UK has supported top Aerospace & Defence, Aviation, Transportation, and Finance clients, empowering digital transformation with industry-leading engineering expertise.
Let’s Tech Together is our promise to encourage innovation and teamwork. We support our engineers with development opportunities and a collaborative, inclusive environment where every voice is valued and empowered.
#Let'sTechTogether
THE OPPORTUNITY
SII UK is seeking an experienced Project Planner to support our customer in the Defence sector. The successful candidate will work on a high-profile and secure defence programme, collaborating with key internal and external stakeholders to deliver robust, high-quality planning solutions. This role will require a strong background in Primavera P6, baseline and schedule management, and resource planning.
Key Responsibilities
- Define Work Breakdown Structures (WBS) and develop detailed project schedules in Primavera P6, in line with planning standards and programme requirements.
- Collect, verify, and maintain forecast updates from internal teams and suppliers, ensuring alignment with master timelines and corporate planning processes.
- Lead the creation, approval, and maintenance of baseline schedules, working closely with the project team to ensure all deliverables and milestones are captured.
- Assess and implement changes through formal processes, including developing what-if scenarios and performing schedule impact analyses prior to approval.
- Load and manage resource assignments using the Enterprise WBS Dictionary, allowing for accurate levelling and identification of potential resource constraints across the programme.
- Generate and present progress reports to senior stakeholders, including inputs for progress meetings and monthly programme review boards.
- Actively support and develop the wider planning community within the team by mentoring junior planners and sharing best practices.
- Use your prior experience to bring efficiencies and insight to both the programme and the planning function, leaving a lasting, positive legacy within the customer’s organisation.
Skills
ESSENTIAL SKILLS AND EXPERIENCE:
- Proven experience in Primavera P6 and complex programme planning
- Strong understanding of baseline management, forecasting, and change control processes
- Familiarity with Defence or high-security sectors preferred
- Excellent communication skills with the ability to work collaboratively across stakeholder groups
- Experience in resource loading and analysis using an Enterprise WBS Dictionary
- Strong reporting skills, particularly in preparing data for senior leadership and programme boards
- Ability to mentor and uplift team capabilities through knowledge sharing
Benefits
- Competitive Basic Salary
- 6% Employers Contribution + 6% as a salary sacrifice
- Private Medical Insurance, Life Cover and Income Protection
- 25 days holiday
- 5 days full sick pay per year
- Flexible working
- Cycle to Work & TechScheme
- Continuous professional development
- Corporate access to the Udemy platform
- If you're applying for a role requiring security clearance, please be aware that foreign or dual nationality is not an automatic bar, however certain posts may have restrictions which could affect those who do not have sole British nationality or who have personal connections with certain countries outside the UK.
http://www.groupe-sii.com/en
