Senior Administrator in Bristol

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.

This role provides day‑to‑day leadership and support to the PPM Administrators, ensuring consistent delivery, workload management, and adherence to process standards. The role is based in Bristol, St Albans or Solihull, with occasional travel to other offices or client sites as required.

• Leadership & Team Management: Provide day‑to‑day leadership, guidance and support to the two PPM Administrators, ensuring consistent delivery standards and effective workload management. Set clear expectations, support capability development and act as the first point of escalation for administrative queries. Promote best practice, process consistency and compliance across all PPM administrative activity. Support the Administration Manager in embedding governance, quality standards and continuous improvement across the wider admin function.
• Operational Oversight & Governance: Collate and validate all hours for frameworks each month internally, and each period for client submission. Maintain accurate and up‑to‑date PPM trackers, ensuring all planned works are recorded and governed effectively. Upload all PPM/L8 and related documentation to internal and external systems in line with governance requirements. Update NWR systems for planned works (Rail Works Western, NW&C, WWA Eastern). Prepare and update relevant sections of progress reports for client meetings. Support the cost team by providing cover for Travel/NHS orders when required. Manage the call‑out rota, ensuring accuracy and timely communication. Issue planned weekend working spreadsheets and ensure all information is aligned with operational requirements.
• Client Engagement & Reporting: Attend progress meetings with the relevant PPM Manager or Contracts Manager, providing administrative insight and ensuring actions are captured. Work collaboratively with Coordinators and operational teams to maintain accurate data and support workflow delivery. Provide clear, professional communication to internal teams and external stakeholders.
• Strategic Support & Continuous Improvement: Ensure all administrative activity meets internal standards for accuracy, timeliness and presentation. Identify opportunities to streamline processes and improve reporting quality. Support the wider administration function in maintaining consistent documentation standards and operational governance. Maintain a high‑level understanding of client requirements, KPIs and reporting obligations.

• Experience in an administrative or coordination role within an operational, technical or service‑led environment.
• Experience supporting or guiding junior team members, or readiness to step into a leadership‑support role.
• Strong organisational skills with the ability to manage multiple workflows and competing priorities.
• High attention to detail and accuracy, particularly in reporting and data governance.
• Confident communicator with strong written and verbal skills.
• Ability to work collaboratively with managers, coordinators and external stakeholders.
• Resilient, proactive and able to challenge constructively when required.

• Proficient in MS Office packages (Excel, Word, Outlook).

• NWR systems (Western, NW&C, WWA Eastern)
• Internal PPM and L8 systems
• Reporting and governance processes
• Operational systems and client portals

• Competitive salary
• 26 days annual leave plus additional company days
• 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. 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. All recruitment materials comply with legal and regulatory requirements including the EU Pay Transparency Directive and the Equality Acts UK and Ireland.