Assistant Site Manager

Location: Horsham, West Sussex (Future projects across Southeast England)

Salary: £40,000 - £50,000 + Travel, Healthcare, Pension & Bonus

• Project Scope: Assist in managing the delivery of a £10m light industrial development, consisting of 7 steel frame and cladded units. The steel frame is erected, and cladding is underway.
• Career Progression: Long-term opportunity with further projects planned across the Southeast.
• Mentorship & Development: Work closely with the company's most experienced Project Manager, who will act as your mentor, providing hands-on training and guidance to help you grow into a future Site Manager.
• Site Duration: Project runs until September this year, with further work secured across the Southeast.

As an Assistant Site Manager, you’ll play a crucial role in ensuring the successful delivery of this industrial project. Working alongside an experienced Project Manager, you’ll gain first-hand exposure to the full site management process, from subcontractor coordination to quality control and health & safety compliance.

Your responsibilities will include:

• Assisting with the day-to-day management of site activities, ensuring work progresses on time and to specification.
• Overseeing subcontractors, ensuring quality control, and addressing any on-site challenges promptly.
• Maintaining and enforcing strict health & safety standards, ensuring compliance across all site operations.
• Collaborating closely with suppliers and key stakeholders to ensure smooth logistics and material deliveries.
• Learning the commercial and contractual aspects of site management to develop a well-rounded skillset.

With the steel frame complete and cladding already underway, your role will be instrumental in managing the upcoming fit-out, M&E, and finishing phases, giving you exposure to the entire construction process. Beyond this project, you’ll have the opportunity to move onto other exciting industrial schemes across the Southeast, progressing your career within a company that truly invests in its people.

My client is a well-respected, privately owned construction company with a strong track record in delivering high-quality industrial projects. With a reputation for excellence, they are committed to delivering large-scale commercial developments across the Southeast.

The company prides itself on a strong team culture, low staff turnover, and ongoing investment in employee growth and development. Financially stable with a full pipeline of work, they offer excellent long-term career opportunities for ambitious professionals.

• A degree in Civil Engineering or a related field.
• Experience working on commercial or industrial projects.
• SMSTS, CSCS & First Aid certifications (Essential).
• Strong organisational skills, attention to detail, and ability to work within a fast-paced site environment.
• A proactive and driven attitude with a willingness to develop and take on responsibility.

• Competitive £40,000 - £50,000 salary.
• Healthcare, pension, travel expenses & bonus.
• A structured mentorship program under the company’s most experienced Project Manager, providing hands-on learning and career development.
• A company committed to career progression and long-term stability.
• Opportunity to work on large-scale industrial projects across the Southeast.

This is a fantastic opportunity for an ambitious Assistant Site Manager looking to develop their skills, gain invaluable mentorship, and build a long-term career in industrial construction.

• Click apply on the job board.
• Send your CV directly to Alex @ Reinforcedltd . co . uk (remove spaces).
• Call Alex on the number below.
• Connect with Alex Wallace on LinkedIn and send a message.

If you’re unsure about your suitability for the role, feel free to reach out—I’d be happy to discuss your experience and career goals.

I’m Alex Wallace, Director at Reinforced Recruitment, and I take a personal and detailed approach to construction recruitment. I work closely with professionals across commercial, project management, design, and site-based roles, ensuring that every placement aligns with their skills and long-term ambitions.

I specialise in construction roles across London and the Southeast, helping professionals find careers that truly fit their aspirations. If you’re looking for your next move, get in touch—I’d love to help.