Site Engineers

We provide highly experienced site engineers to support construction and development projects. Our engineers can provide precision site control installation, datum establishment, setting out, as-built surveys, construction verification, and clash detection, as well as structural and environmental monitoring. We can provide millimetre-accurate setting out services for everything from low-tolerance racking systems to the setting out of piles on large-scale infrastructure projects.

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Setting Out Interlocks Surveys PHOTO 2025 06 11 14 09 23 2

When do I need a Site Engineer?

The site engineer acts as an interface between the design team and the construction workforce. They are on site to translate drawings into physical marks on the ground, and to confirm that the project is proceeding according to specification. A site engineer is therefore needed wherever the workforce needs direction on exactly where to build, and to check that what has been built is correct.

Their role is multifaceted but essentially covers three key areas:

  1. Setting Out
    A site engineer’s primary function. They establish the site control and transfer specific coordinate points from the drawings to the ground. For example, marking the exact centre point for pile foundations or the alignment of a steel column.
  2. Levelling
    Establishing and transferring the TBM (Temporary Bench Mark). They ensure that the “Finished Floor Level” (FFL) is exactly as specified in the planning permission, preventing height-breach disputes.
  3. Quality Assurance (QA) and ‘As-Builts’
    They check the work as it is being done. For example, before a concrete pour the site engineer checks the shuttering and reinforcement. After the pour, they survey the result to produce “As-Built” drawings, verifying that the structure is within tolerance.

Site engineers are not needed for a simple garden wall, but would be needed for projects that involve:

  • Steel frame construction
  • Complex civil engineering and drainage
  • Complex racking systems
  • Boundary critical works
  • Reinforced concrete (RC) frames

Deliverables

Our site engineers can provide a multitude of deliverables, including:

  • As built drawings
  • Site control coordinates
  • Setting out data and reports
  • Datum values
  • Monitoring data and reports
  • Cut and fill calculations
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Expert control on site

Get experienced site engineers delivering precise setting out, verification, and quality assurance throughout your build.

I wanted to take a moment to share some very positive feedback regarding Jamie, currently supporting the works at Westbury Viaduct. Since joining the team, Jamie has made a noticeable and genuinely positive difference. His proactivity, strong work ethic, and engaged communication with the client have all stood out. He has integrated quickly and effectively into the team, and his approach has already helped strengthen collaboration on site. I felt it was important to highlight the value he is adding, and to let you know that his contribution is very much appreciated. We look forward to continuing the momentum as we progress with the successful installation of the parapets. Thanks again, and please pass on our appreciation to Jamie.
Jose Segovia
FC Civil Solutions (Ferrovial)
Thank you for this – and I appreciate your quick turnaround from our late request, and many thanks to Alyx for his work on site!
Steven Jewell
MiTek
Thank you for all your and the teams’ efforts in getting such great packages of drawings to us! Really appreciated it.
Caroline Edwards
Acanthus Clews
The survey data we received last night was exactly what we needed. It showed us that the existing access road doesn’t match our construction drawings, which is a significant find for us. Thanks again for managing to rearrange your schedule; it’s really helped us stay on track with our tight deadlines.
​​​​​Tom Gardner
YMD Boon Ltd (Architects)
Your drawings were exemplary and equal to those of another survey firm in quality.
Henry Sanders
Hestia Architects Ltd
Just want to say thank you to the surveying team for the professional and efficient way they carried out the onsite topographical survey at our site.
Steve Blacker
Stansgate Planning
I am more than happy to vouch for the quality and timeliness of Interlocks Surveys work at St Bartholomew’s Hospital and can confirm that their ways of working were appropriately considerate of the nature of St Barts as a Grade I listed heritage asset.”
Ian Haig
Barts Heritage (NHS)
That is excellent thank you. Thank you and the team for your hard work on this. I appreciate it was a whopper of a project to get done given the sheer scale of the site and all the off site highways to considered.
Lauren White
Hallam Land
Swan have been very happy with the service and prices from Interlock.
Tim Major
Swan Environmental
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