Senior Site Manager in City of London

Responsible for the operational management of a large-scale or complex construction project under the guidance of the Senior Site Agent. Leads the on-site team to ensure safe, efficient and high-quality delivery. Provides direct supervision and mentoring to Site Managers, Site Agents and supervisory staff while ensuring alignment with project programme, commercial objectives and company standards.

At John Sisk & Son, we’re more than a construction company, we’re a family‑owned business with a global reach, committed to building excellence in every project. We deliver trust, certainty and value to our clients while embracing innovation and shaping the future of construction.

Responsibilities

• Manage and oversee the day‑to‑day operations of the site to ensure work is carried out safely, efficiently and to programme.
• Lead Site Managers, Site Agents, General Site Supervisors and other supervisory staff to achieve project objectives.
• Ensure strict compliance with health, safety, environmental and quality procedures and actively promote a zero‑incident culture.
• Monitor progress against the project programme, ensuring weekly targets and milestones are achieved.
• Coordinate site setup and ensure facilities are prepared prior to project launch.
• Manage sub‑contractor relationships and work collaboratively to resolve issues impacting programme, cost, safety or quality.
• Maintain and review site records including Temporary Works Registers, daily diaries, quality documentation and HSEQS logs.
• Lead site meetings, briefings and whiteboard sessions to communicate priorities, objectives and safety expectations.
• Escalate risks or challenges to Senior Site Agent or Senior Operations Manager for mitigation.
• Support the commercial and project management teams in understanding site requirements and achieving cost‑effective delivery.
• Drive continuous improvement by identifying opportunities to enhance safety, productivity, quality and efficiency.
• Mentor and develop Site Managers and supervisory staff, supporting professional development and succession planning.

Experience

• Extensive experience managing medium to large‑scale construction projects.
• Strong leadership and people management skills, capable of supervising multi‑level site teams.
• Knowledge of industrial relations and subcontractor management.
• Excellent communication skills, capable of influencing and building consensus among stakeholders.
• Ability to prioritise, make decisions under pressure and resolve operational challenges on site.
• Comprehensive understanding of construction methods, trade requirements and codes of practice.
• Proven experience in programme management and project delivery within budget and schedule.
• Strong awareness of health, safety, environmental and quality management practices.

Required Qualifications

• Trade or technical background with substantial site management experience.
• IOSH or equivalent health and safety management training.
• Temporary works and excavation safety training.
• Working at heights and scaffolding training.
• Lifting and cranage operations training.
• Additional HSEQS training as required by site HSE plan.
• Understanding of BIM strategy and new construction technology.

Desirable

• Completion of Sisk internal management programme.
• Project management qualification or course.
• Relevant degree in construction or engineering.

Additional Information

• Competitive salary.
• 26 days annual leave.
• Pension and benefits.
• Unlimited learning and development opportunities.
• Much more.

At Sisk Group our people are at the heart of our success. We offer the chance to work with purpose, build a career with no limits and be part of a great team. All vacancies are managed directly by our Internal Recruitment Team. Unsolicited contact or speculative CVs from unapproved agencies will not be accepted and no introductory fees will apply. We are an equal opportunities employer. We welcome applications from all qualified candidates regardless of gender, race, ethnicity, disability, age, sexual orientation, religion or any other protected characteristic. Reasonable adjustments are available during the recruitment process. We know the confidence gap and imposter phenomenon can stop talented candidates applying. You do not need to meet every criterion – your skills and potential matter. Don’t hold back we want to hear from you.

All recruitment materials comply with legal and regulatory requirements including the EU Pay Transparency Directive and the Equality Acts UK and Ireland.