Commercial Officer in Hampshire, Portsmouth

An excellent opportunity has arisen for a Commercial Officer to join the KBS Maritime Commercial Team, supporting the delivery of infrastructure projects within a highly collaborative, client-facing environment at HM Naval Base Portsmouth.

Working closely with Project Managers, Engineers, Supply Chain, and Finance teams, the Commercial Officer will provide commercially focused advice, support informed decision-making, and contribute to the successful delivery of infrastructure investment programmes.

What you will be doing:

• You will work as part of the team, ensuring the effective commercial management of projects across the full lifecycle, from concept and business case development through the tender process and into contract execution and close-out.
• Supporting the Commercial Manager in the day-to-day commercial management of infrastructure projects, ensuring activity is delivered in line with contractual requirements.
• Assisting with the administration of contracts across both pre-contract and post-contract stages, including the drafting, review and management of contractual documentation, while also helping to ensure compliance with prime contract obligations and the effective flow-down of requirements to the supply chain.
• Support the development of project cost estimates, budgets and forecasts, helping to ensure robust financial planning across a varied portfolio of infrastructure projects.
• Supporting the preparation and submission of Task Approval Forms proactively support the management of the pipeline of deliverables requiring client approval, ensuring timely submissions and effective engagement, while also building strong working relationships with all stakeholders to support efficient decision-making and successful programme delivery.
• Maintaining accurate records of change events, ensuring robust governance is applied throughout, and helping to secure appropriate commercial recovery in support of project and business objectives.

What you will bring:

• Experience operating in a similar Commercial, Projects or Quantity Surveying role within an infrastructure or engineering environment.
• An understanding of Terms & Conditions (Such as UK MoD, NEC or DIO Frameworks).
• A desire of working towards professional certifications such as WCC Foundation, CIPS, RICS.

About you:

• Commercially astute and motivated, with the ability to balance risk, value for money, and delivery outcomes in a dynamic project environment.
• Collaborative team player with strong interpersonal skills, able to build effective relationships across client, project, and supply chain stakeholders.
• Highly organised with excellent attention to detail, ensuring accuracy, governance, and robust commercial controls while managing competing priorities.
• Proactive and resilient, with a “can-do” attitude and commitment to driving continuous improvement in commercial processes and project outcomes.

You’ll get:

• 25 days holiday plus bank holidays.
• Holiday purchase scheme, following successful completion of probation period.
• Early finish on a Friday.
• Discretionary company bonus scheme.
• Enhanced pension scheme – employee contribution 4% and company contribution 6%, or you can increase your contribution to 6% and company contribution will increase to 10%.
• Life assurance x 4 (subject to scheme T&C’s).
• Access to our internal benefits and discounts programme for all colleagues.
• Cycle to work scheme.
• Group income protection.
• Flexible parental benefits (if applicable).
• Free parking onsite.
• Access to our Internal employee assistance network, giving you the opportunity to reach the heights of success within your new position.
• Continued professional career development.
• Kudos reward opportunities (internal achievements scheme).
• Occupational Health & Wellbeing Services.
• Discount off entry into the Historic Dockyard.

Application process:

Applicants are urged to apply prior to the advertising closing date Friday 19th June 2026.

Please note that due to the nature of the site we are based on and the work carried out, once offered we carry out a number of pre-employment checks which include UKSV clearance applications – you will need to be eligible for this and willing to go through the process. For more information, please speak with the Talent & Recruitment team.

About us:

At KBS Maritime, we're not just another company – we're an exciting and dynamic joint venture between industry leaders BAE Systems and KBR. Our team is dedicated to providing Asset Management, Infrastructure Management, Energy Solutions and Alongside Services at His Majesty's Naval Base Portsmouth (HMNBP), the beating heart of the Royal Navy.

With almost two-thirds of the Royal Navy's surface ships stationed at HMNBP, working with KBS Maritime means being at the forefront of innovation and progress. We operate in a unique and fascinating environment, with a mix of historic dockyards and cutting-edge infrastructure that's unlike any other.

By delivering state of the art solutions to the Royal Navy, KBS Maritime offers the chance to work on projects that make a real difference to the safety, security, and sustainability of the UK's National Defence and Security. But it's not just about the work – at KBS Maritime, we believe in the value of our people. We have the ethos of a small business, which means we value and empower our team members to succeed.

KBS Maritime is committed to building a diverse workforce and fostering an inclusive workplace. We welcome applications from individuals of every social or cultural background, age, gender, ability, sexual orientation, and belief.

We will make reasonable adjustments to the recruitment process to accommodate any disability. In the first instance, if you require this job advert in an alternative format, or require any assistance, please contact.