Project Administrator

Thornton Tomasetti applies engineering and scientific principles to solve the world’s challenges. An independent organization of creative thinkers and innovative doers collaborating from offices worldwide, our mission is to bring our clients' ideas to life and, in the process, lay the groundwork for a better, more resilient future. We provide support and opportunities to our employees to achieve their full potential and cultivate a rewarding career.

The Role

Thornton Tomasetti is seeking an organised, proactive, and service-oriented Project Administrative to support our Romsey office, which forms part of our Protective Design & Security (PD&S) practice.

This is a varied role supporting the day-to-day operation of the office as well as our project teams, travel coordination, and security administration. You’ll work closely with colleagues across the Romsey office, the wider PD&S practice, and Thornton Tomasetti, helping ensure our people and projects have the administrative support they need.

You’ll be someone who enjoys taking ownership, managing multiple priorities, and being the person colleagues can rely on to keep things organised and running smoothly. Given the nature of our work, you’ll also need to be comfortable handling confidential and security-sensitive information with professionalism and discretion.

What You’ll Do

• Support the day-to-day administration and smooth running of the Romsey office.

• Coordinate office supplies, facilities, equipment, visitors, meetings, and general office logistics.

• Act as a helpful and responsive point of contact for office-related queries.

• Maintain accurate office records, registers, contact information, and filing systems.

• Support office events, meetings, hospitality, and internal communications.

• Provide administrative support to project teams, project managers, and the Office Manager.

• Assist with purchase orders, invoices, expenses, and other project-related administration.

• Maintain project documentation and handle project and client information accurately and confidentially.

• Arrange domestic and international travel, including flights, rail travel, accommodation, ground transportation, and meeting facilities.

• Provide administrative support to the Security Controller and wider PD&S practice.

• Maintain security-related records, registers, contact lists, documentation, and filing systems.

• Support security administration and processes, handling sensitive information with appropriate care and discretion.

• Work collaboratively with colleagues across the Romsey office, PD&S practice, and wider Thornton Tomasetti organisation.

What You’ll Bring

• Previous experience in an Administrative Assistant, Project Administrator, Office Administrator, or similar role.
• Strong organisational skills and excellent attention to detail.
• The ability to manage multiple priorities and deadlines effectively.
• Excellent written and verbal communication skills.
• Strong proficiency in Microsoft Office, particularly Outlook, Word, Excel, and Teams.
• Experience supporting projects, maintaining records, document control, or working within a professional-services environment.
• Sound judgement and discretion when working with confidential or sensitive information.
• A proactive, collaborative, and service-oriented approach with a willingness to take ownership.
• The ability to build effective working relationships with colleagues across different teams and levels of an organisation.
• Experience within security, engineering, construction, defence, or another regulated environment would be beneficial but is not essential, as appropriate training will be provided.
• The ability to obtain and maintain the appropriate UK Security Vetting (UKSV) clearance required for the role.

Thornton Tomasetti is proud to be an equal employment workplace. Individuals seeking employment at Thornton Tomasetti are considered without regards to age, ancestry, color, gender (including pregnancy, childbirth, or related medical conditions), gender identity or expression, genetic information, marital status, medical condition, mental or physical disability, national origin, protected family care or medical leave status, race, religion (including beliefs and practices or the absence thereof), sexual orientation, military or veteran status, or any other characteristic protected by federal, state, or local laws.

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