Onboarding Advisor

Sizewell C Limited; Bridgwater Without; On-site; GBP 24,000 - 38,000; Full time

Job summary

Sizewell C Limited, in partnership with the Civil Works Alliance (CWA), invites applications for an Onboarding Advisor to help build a positive, efficient experience for people joining the CWA on the Sizewell C project.

The role will coordinate onboarding activity across recruitment, HR, people services and operations, ensuring new starters receive the information, support and documentation they need to begin their roles successfully.

Qualifications

• Experience in onboarding, recruitment coordination, HR administration, people services, or a similar support-focused role.
• Ability to coordinate multiple onboarding activities, deadlines, and stakeholders accurately and efficiently.
• Strong organisational skills and a methodical approach to maintaining records and completing documentation.
• Clear, professional communication skills, with the confidence to engage with new starters, hiring managers, and internal teams.
• A responsive and service-focused approach, with the ability to handle queries sensitively and professionally.
• Good attention to detail and a commitment to delivering accurate, consistent information.
• Ability to work effectively in a collaborative, matrix-based environment and build positive working relationships.
• Confidence using Microsoft Office and digital systems, with the ability to learn new processes and tools quickly.
• Understanding of confidentiality, data protection, and the importance of handling personal information appropriately.
• A proactive approach to identifying improvements that make the onboarding experience more effective and inclusive.
• Commitment to the CWA values of Humility, Positivity, Respect, Solidarity, and Clarity.

Responsibilities

• Coordinate onboarding activity across recruitment, HR, people services, and operations.
• Act as a reliable point of contact for new joiners throughout onboarding.
• Ensure information, support, and documentation are provided to start roles.
• Maintain accurate records and track onboarding milestones.
• Respond promptly to onboarding queries from stakeholders.
• Collaborate in a fast-paced project environment and promote inclusivity from day one.

Skills

Onboarding coordination

Recruitment coordination

HR administration

People services

Microsoft Office

Data protection

Stakeholder management

Communication skills

Attention to detail

Process improvement

Tools

HRIS systems

ATS software

Job description

Onboarding Advisor Opportunity with the Civil Works Alliance (CWA), Supporting Sizewell C

As part of the CWA (Civil Works Alliance), you will support the building of Sizewell C. Sizewell C will be a 3.2-gigawatt power station generating low-carbon electricity for around 6 million homes and will play a key role in our energy future, supplying reliable, clean electricity for at least 60 years. This role will be within the CWA Wide Section.

What will you do?

The Onboarding Advisor will help create a positive, efficient, and welcoming experience for people joining the CWA. Working with colleagues across recruitment, HR, people services, and operational teams, the role will coordinate onboarding activity and ensure new starters receive the information, support, and documentation needed to begin their roles successfully.

The successful candidate will act as a reliable point of contact throughout the onboarding journey, keeping activities on track, maintaining accurate records, and responding promptly to queries. The role will suit an organised and people-focused professional who enjoys working collaboratively in a fast-paced project environment and is motivated by helping colleagues feel prepared and included from their first interaction with the organisation.

What are we looking for?

• Experience in onboarding, recruitment coordination, HR administration, people services, or a similar support-focused role
• Ability to coordinate multiple onboarding activities, deadlines, and stakeholders accurately and efficiently
• Strong organisational skills and a methodical approach to maintaining records and completing documentation
• Clear, professional communication skills, with the confidence to engage with new starters, hiring managers, and internal teams
• A responsive and service-focused approach, with the ability to handle queries sensitively and professionally
• Good attention to detail and a commitment to delivering accurate, consistent information
• Ability to work effectively in a collaborative, matrix-based environment and build positive working relationships
• Confidence using Microsoft Office and digital systems, with the ability to learn new processes and tools quickly
• Understanding of confidentiality, data protection, and the importance of handling personal information appropriately
• A proactive approach to identifying improvements that make the onboarding experience more effective and inclusive
• Commitment to the CWA values of Humility, Positivity, Respect, Solidarity, and Clarity

What we will offer you?

The CWA is a single delivery organisation made of up of the client (Sizewell C) and three parent companies - Balfour Beatty, Bouygues and Laing O'Rourke - which offer industry leading packages including market leading salaries, generous annual leave entitlements, pension scheme and other flexible benefits.

About Us

The CWA celebrates the creativity and innovation that comes from a diverse workforce, and we welcome applications from people of all backgrounds — especially those from under‑represented communities. Our project is built on five core values: Humility, Positivity, Respect, Solidarity, and Clarity.
By joining us, you’ll be encouraged to bring your whole self to work, speak up, and share your ideas. We encourage applications from all suitably qualified candidates, regardless of gender, race, disability, age, sexual orientation, gender reassignment, religion or belief, marital status, or pregnancy and maternity.
We are committed to protecting your privacy. If you decide to apply, please avoid including sensitive personal data in your CV.