Key Account Manager

HSS ProService Marketplace; Greater London; Hybrid; GBP 50,000 - 80,000; Full time

Benefits offered by this job

25 days holiday

Birthday off

Healthcare Cashback

Hybrid working

Onsite gym

Training and development

Perks platform discounts

Cycle to Work

Job summary

HSS ProService Marketplace in the UK is seeking a proactive Key Account Manager to strengthen relationships with major infrastructure clients and suppliers. You’ll own complex accounts, drive growth, and coordinate across operations and supply chain to deliver service excellence on live projects.

You’ll build trusted partnerships with site teams, procurement leads, and stakeholders, monitor KPIs, and spot opportunities to improve commercial performance while working in a flexible hybrid

Qualifications

• Experience in construction, infrastructure, hire, utilities, rail, civils, or industrial supply environments.
• Strong track record managing key customer relationships in a fast-paced commercial setting.
• Excellent stakeholder management and relationship-building skills.
• Commercial awareness with ability to identify growth opportunities and drive performance.
• Ability to manage multiple workstreams across complex live projects.
• Proactive, solutions-focused mindset with strong operational awareness.
• Confident working both strategically and hands-on within customer environments.
• Excellent communication, organisation, and problem-solving skills.

Responsibilities

• Managing day-to-day delivery across major infrastructure projects and key contractor accounts.
• Building strong relationships with site teams, procurement leads, plant teams, and operational stakeholders.
• Conducting regular customer visits across HS2, LTC, and wider infrastructure projects in the South.
• Coordinating plant, equipment, consumables, and service requirements across live projects.
• Working with operational and supply chain teams to ensure on-time, on-budget delivery.
• Monitoring KPIs, SLAs, and service delivery performance to exceed expectations.
• Identifying opportunities to enhance customer experience and commercial performance.
• Supporting project mobilisations, planning activity, forecasting, and reporting.
• Identifying opportunities to grow accounts with additional products, services, and solutions.
• Providing clear updates on project risks, opportunities, actions, and account performance.

Skills

Construction experience

Key account management

Stakeholder management

Growth mindset

Multi‑project coordination

Proactive problem solving

Strategic & hands-on

Communication skills

Driving licence

Job description

Overview

A typical day as a Key Account Manager. No two days look exactly the same, and that’s part of what makes it work. As a Key Account Manager, you’ll play a key part in keeping things moving for our customers, suppliers and The Pros around you. You’ll take ownership, solve problems properly, and work with people across the business to make things simpler, faster and better. You’ll be trusted to get stuck in, make decisions, and see things through.

What you’ll be doing

You’ll join our growing Infrastructure team, supporting some of the UK's largest construction projects including HS2 and the Lower Thames Crossing. As a Key Account Manager, you'll build strong customer relationships, drive account growth, and work closely with operational and supply chain teams to deliver exceptional service across major live infrastructure projects throughout the South.

• Managing day-to-day delivery across major infrastructure projects and key contractor accounts
• Building strong relationships with site teams, procurement leads, plant teams, and operational stakeholders
• Conducting regular customer visits across HS2, LTC, and wider infrastructure projects throughout the South
• Coordinating plant, equipment, consumables, and service requirements across live project environments
• Working closely with operational and supply chain teams to ensure projects are delivered on time and within budget
• Monitoring KPIs, SLAs, and service delivery performance to ensure customer expectations are exceeded
• Identifying operational improvements and opportunities to enhance customer experience and commercial performance
• Supporting project mobilisations, planning activity, forecasting, and reporting
• Identifying opportunities to grow accounts through additional products, services, and solutions across the HSS ProService offering
• Providing clear updates on project risks, opportunities, actions, and account performance

What you’ll bring

We’re looking for someone who knows how to get things done and works well with others to make it happen. You don’t need to tick every single box, but you’ll likely bring:

• Experience within construction, infrastructure, hire, utilities, rail, civils, or industrial supply environments
• Strong experience managing key customer relationships in a fast‑paced commercial environment
• Excellent stakeholder management and relationship‑building skills
• Commercial awareness with the confidence to identify growth opportunities and drive account performance
• The ability to manage multiple workstreams and priorities across complex live projects
• A proactive, solutions‑focused mindset with strong operational awareness
• Confidence working both strategically and hands‑on within customer environments
• Excellent communication, organisation, and problem‑solving skills
• Full UK driving licence and willingness to travel across the South regularly

Experience supporting major infrastructure projects such as HS2, highways, rail, energy, civils, or utilities would be highly advantageous.

Most importantly, you’ll bring the mindset of a Pro:

• You take ownership
• You communicate clearly
• You work collaboratively
• You look for better ways to do things
• You see things through properly

What you’ll get back

• 25 days holiday plus bank holidays
• Your birthday off every year to spend how you want
• Healthcare Cashback Plan with money back on things such as dentists, opticians and sports massages
• Flexible and hybrid working
• Free onsite gym at head office
• Training and development opportunities to keep growing your skills and career
• Discounts and cashback through our perks platform
• Flexible benefits including Cycle to Work and Holiday Buy

What it’s like here

At HSS ProService, we’re here to take the friction out of hire. We’ve built a smarter, faster way for businesses to get the tools, equipment and materials they need. We connect customers with trusted suppliers through one simple online marketplace.

But what really makes it work is our people. The Pros. The ones who step in, solve problems, keep things moving and make life easier for customers and each other.

We use technology, teamwork and bold thinking to make things simpler, clearer and better every day. The Pros here are Progress Makers, Professionals, Problem Solvers and Proud of the work they do. People who take ownership, back each other, speak honestly and keep things moving.

That Means

• Say it. Own it. See it through.
• Bring in the people power.
• Be straight, be clear.
• Recognise the graft.

We’re building a revolution! Big ideas. Smart tech. Great people. We’re building something new and having fun doing it. If you’ve got ideas, energy, and up for a challenge, you’ll fit right in.