Note for Recruitment Agencies:We prefer to hire directly and we will be in touch with our PSL Agencies if this role is eligible for release.We do not accept speculative CVs from agencies. If speculative CVs are sent, no fee will be applicable – please direct all queries to the relevant Resourcing Partner.Role Title: Senior Site Manager Business Unit: Asset IntelligenceLocation: Thames Valley Area - Site Based Role Overview: An opportunity has arisen for a Senior Site Manager to support Galliford Try Asset Intelligence on a Thames Water Security Upgrade site. The role will provide overall site leadership and coordination across civils, physical security, electronic security systems and commissioning workstreams within a live operational water environment. The Senior Site Manager will act as the senior on-site representative for the project team, ensuring the works are delivered safely, efficiently, to specification and with minimal disruption to Thames Water operations.What you will be doing:Lead the day-to-day management of all on-site operations for the assigned Thames Water security upgrade site.Coordinate multidisciplinary workstreams including civils, physical security, electronic security systems, electrical works, commissioning engineers, designers, subcontractors and specialist suppliers.Act as the primary on-site point of contact for Thames Water site teams, operational stakeholders, security stakeholders, subcontractors and internal project teams.Ensure all work packages are delivered in line with the agreed programme, technical specifications, approved drawings, RAMS, permits, ITPs and project constraints.Maintain a strong safety culture in line with CDM requirements, Galliford Try procedures, Thames Water site requirements and water industry safe working expectations.Ensure daily briefings, toolbox talks, RAMS reviews, point-of-work checks and permit controls are completed and recorded.Manage security-sensitive working arrangements, including access control, visitor controls, secure handling of drawings and control of site information relating to security assets.Plan and coordinate phased works to minimise impact on live water treatment, distribution or operational processes.Coordinate civils works including excavations, ducting, service avoidance, bases, perimeter works, reinstatement and interfaces with existing utilities.Oversee physical security works including fencing, gates, barriers, turnstiles, secure compounds and associated foundations or fixing details.Oversee electronic security system installation including CCTV, access control, intruder detection, PIDS, containment, cabling, panels and communications infrastructure.Support commissioning planning, site acceptance testing, handover documentation and post-installation training where required.Monitor progress, labour, plant, materials, subcontractor performance, constraints, delays, defects and emerging risks.Maintain accurate site records, daily diaries, progress photographs, quality evidence, as-built information, red-line records and handover documentation.Support commercial control by validating progress, recording evidence, highlighting early warnings, identifying changes and reducing avoidable rework.Escalate safety, operational, design, commercial or programme risks promptly to the Project Manager and Delivery Manager.About you:Strong experience in a senior site management role within construction, infrastructure, utilities, water, security or similarly controlled operational environments.Confidence leading multi-discipline site teams and coordinating subcontractors, specialist suppliers, designers and commissioning teams.Good understanding of CDM, SHEQ processes, RAMS, permits, temporary works, ITPs, NCRs, snagging and handover requirements.Able to read and interpret drawings, specifications, programmes, technical documentation and site records.Strong client-facing communication skills and the ability to build effective relationships with Thames Water operational personnel and project stakeholders.Commercially aware, with the ability to identify risks, variations, early warnings and programme constraints.Able to work in a security-sensitive environment and maintain confidentiality around site layouts, security drawings and system details.SMSTS and CSCS Black Card or equivalent.First Aid at Work.EUSR Water Hygiene.Temporary Works Coordinator or Temporary Works Supervisor awareness.Experience on water treatment works, utilities, CNI, MOD or secure infrastructure projects.Experience with FieldView, Viewpoint for Projects, SharePoint, Teams, Primavera P6 or similar project systems.What We Can Offer in Return:With an impressive order book of over 4.1 billion we are one of the industry’s leading principal contractors, affording you the opportunity to work on some of the UK’s most exciting projects offering you stability as well as the chance to stretch your capabilities and realise long held career goals. You will be joining diverse teams working at a high professional level with exceptional levels of commitment. With an ambitious strategy, we’re poised for further growth and success, so if you’re committed, talented and enthusiastic, Galliford Try is the right place for you. We are committed to maintaining the physical and mental wellbeing of all our people, through our ‘Be Well’ programme which offers discounts on certain products, advice and support for a range of issues. We invest in high-quality training for employees of all levels, from our leadership development framework to our apprenticeship programmes. Through our Career Paths initiative, individuals receive tailored training and support to fulfil their potential.Our industry is all about creating talented teams that excel in their areas of expertise. As an employer, we know you are most motivated to give your best when you feel valued and engaged. Our Agile Working programme empowers you with flexibility in when, where and how you work. Where appropriate, site and office-based employees can take advantage of a wide variety of working practices, offering different amounts of structure, regularity and flexibility to suit your needs as well as those of your wider team.Our Benefits:We put our people first and our benefits package reflects that by offering a comprehensive range of attractive options to help support your career on top of a competitive salary.Generous holiday entitlement, increasing with years of service, plus the opportunity to purchase further holidaysA wide range of corporate discountsCycle to Work schemesComprehensive pension planRegular Save as You Earn share purchase schemePrivate medical scheme options are available for all salaried employees and our employee assistance programme also provides free 24/7 support to those who need itPaid for yearly membership to one recognised professional association relevant to your roleAbout us:Galliford Try is one of the UK’s leading construction groups with a vision to continuously be a people-orientated, progressive business, driven by our values to deliver lasting change for our stakeholders and the communities we work in.Our purpose is to improve people’s lives through building the facilities and infrastructure that communities need, providing opportunities for our people to learn, grow and progress, working with our supply chain to promote the very best working practice and caring for the environment in which we work.We do this by holding true to our values, delivering excellence for our clients and the community, being passionate about our role in providing vital services, putting integrity at the heart of our business by doing the right thing, and collaborating with our clients, supply chain and stakeholders to deliver lasting change and long-term value.For more information on this role or to enquire about other positions available within our Specialist Services business please contact Skyemarie.bree@gallifordtry.co.ukAdditional Information:Galliford Try welcomes applications from candidates who would like to work full-time, reduced hours or flexibly and this will be discussed in more detail as part of the recruitment process. We encourage, and would be grateful if, you could confirm any requirements we can reasonably fulfil to make this application a positive experience for you. Don’t meet every requirement of the role? Studies have shown that some people are less likely to apply for jobs unless they meet every single qualification. At Galliford Try, we are committed to building a diverse, inclusive and authentic workplace, so if you’re excited about this role but your past experience doesn’t align perfectly with every requirement of the role, we encourage you to apply anyway. You may be just the right candidate for this or other roles.As a Disability Confident employer, we have committed to offer an interview to any candidate with a long-term health condition or disability that meet the essential criteria for the advertised position. Please contact the Resourcing Partner listed within the job advert if you believe this applies to you. We will also take the opportunity to discuss any adjustments required for your interview.A full job description for this role is available upon request.#LI-SB1Full timePosting Date: 2026-08-03
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