Principal Transport Planner

Lead projects. Win work. Shape growth.

SLR is a global leader in sustainability solutions, working with clients to help make sustainability happen, within a collaborative, people-first culture. As a result of continued growth, we’re looking for an ambitious and commercially minded Principal Transport Planner to join our established Cardiff team.

This is an opportunity for an experienced consultant who wants to do more than deliver great projects. We're looking for someone who can help strengthen and expand our presence across the South West, build lasting client relationships, identify new opportunities and play a key role in the continued growth of our transport planning business.

Alongside technical leadership, you'll be a trusted adviser to clients, a mentor to developing consultants and a visible contributor to business development activities. Working closely with regional and national leaders, you'll have the platform to influence strategy, develop key accounts and help secure the next generation of projects for the team:

• Lead the delivery of transport planning projects across a diverse client portfolio
• Develop and maintain strong client relationships that generate repeat business
• Identify opportunities, support bids and contribute to winning new work
• Lead client meetings, presentations and stakeholder engagement
• Manage project performance, profitability and programme delivery
• Deliver high-quality Transport Assessments, Statements and Travel Plans
• Mentor developing team members and support the growth of the team

You’ll collaborate with colleagues across Planning, Environmental and Engineering disciplines on impactful projects, with opportunities to work across the UK as part of a wider national team.

Rewards & Benefits

SLR's ‘One Team’ culture is at the heart of our business, providing a collaborative and supportive environment where people can develop and grow. Through a structured career framework, regular performance reviews, and support towards chartership, professional qualifications and licences, we offer excellent opportunities for long-term career progression. Our flexible benefits and reward package includes:

• Competitive salary with discretionary bonus
• Company pension
• Private medical insurance
• Life, income, and travel insurance
• Salary sacrifice car lease and cycle‑to‑work schemes
• Flexible, hybrid and agile working
• 25 days’ annual leave plus flexible public holidays
• Buy or sell leave options
• Core working hours
• Cross‑border remote working and sabbatical opportunities
• Enhanced maternity, paternity and adoption leave pay
• Workplace Nursery benefit
• Volunteering and Community Giving
• Employee Assistance Programme
• Specialist support for mental health, stress and menopause - supporting our people both professionally and personally

About You

• Extensive UK transport planning consultancy experience
• Relevant degree and professional membership (MCIHT or similar)
• Strong client management and business development skills
• Proven ability to win work and grow existing client relationships
• Technical expertise in transport planning and appraisal
• Strong communication, leadership and problem-solving skills
• Experience with JUNCTIONS and LINSIG (desirable)
• Experience working with Energy sector clients would be advantageous

Culture & Inclusion

Inclusion is fundamental to who we are. We are committed to equal opportunities and foster a workplace where everyone can thrive, supported by active Culture & Inclusion Committees and Employee Networks. We welcome applications from candidates of all backgrounds and are a Disability Confident Committed employer. If you require any adjustments during the recruitment process, please let us know and we will be happy to support you.

If this Principal Transport Planner role feels like a great fit for your experience and ambitions, we’d love to hear from you.

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