Slurry Treatment Plant Lead Operator

The ALIGN Slurry Treatment Plant Lead Operator will be responsible under the STP Manager for operate the Slurry Treatment Plant.
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The Chiltern Tunnels will be constructed with the help of two Variable Density Tunnel Boring Machine, spoils are evacuated from the tunnel by a hydraulic mucking system and are separated at the South Portal by a Slurry Treatment Plant.

 The ALIGN Slurry Treatment Plant Lead Operator will be responsible under the STP Manager for operate the Slurry Treatment Plant. The STP Lead Operator will ensure that all production tasks are completed on time, whilst never compromising the advancement of the Tunnel Boring Machine.

 The Slurry Treatment Plant Lead Operator scope of works includes:

 Operate all equipment’s of the station

  • Adjust the slurry quality going back to the Tunnel Boring Machine under the STP Manager/Engineer recommendation.
  • Monitor the quality of the spoils to allow them a proper landscaping.
  • Adjust the water quality to allow recycling internally in the mucking system or discharge to the site internal drainage system
  • Manage the Bentonite preparation and its transfer.
  • Manage the STP team during his shift.

The Align opportunity

The construction of the Chiltern tunnels and Colne Valley Viaduct are two of the most eye-catching and challenging engineering projects on the HS2 route. Align is the joint venture created to achieve this task – we've created one integrated team of specialists from three partners with global reputations: Bouygues Travaux Publics, VolkerFitzpatrick and Sir Robert McAlpine.

By joining Align you can become an integral part of this landmark project – with the opportunity to develop your expertise as the project progresses and leave a legacy to be proud of for the rest of your career.

The C1 Package includes the following elements:

  • The iconic Colne Valley Viaduct which is a “structure of international significance”; 3+ km long and spanning the lakes of the Colne Valley (architectural images can be found online).
  • Chiltern Tunnels – 2 x 16km long tunnels through the Chiltern Hills
  • Western Valley Slopes (South Portal) – 2.5km of earthworks including the TBM launching portal and main compound in Maple Cross housing the TBM plant and equipment, main offices and tunnel/viaduct pre cast yards
  • 5 x Ventilation Shafts at Chalfont St. Peter, Chalfont St. Giles, Amersham, Little Missenden and Chesham. Shaft depth between 35m-65m with diaphragm walls up to 80m deep. Headhouses at each location.


The ALIGN Slurry Treatment Plant Lead Operator will be responsible for:

  • Ensuring the STP Manager is updated on all issues as soon as possible, to mitigate the risk of production downtime.
  • Reporting all planned preventative maintenance tasks with the maintenance teams to avoid any unnecessary downtime to the production.
  • Leading the daily activity briefing to ensure that all team member understand the planned activities and are aware of any changing risks associated with the planned works.
  • Monitor the quality of the spoil (mainly the water content) is suitable with the requirements for landscaping.
  • Recording any events which affect the day’s activities in a comprehensive site diary (e.g. weather, resource availability, instructions received, interfaces with other tasks etc.…) and providing the adequate feedback to enable the updating of progress reports, daily diaries changes and issues for areas of responsibility.
  • Control the performance of filter presses and adjust the parameters.
  • Adjustment of the slurry quality in regards of the STP Manager/Engineer recommendation.
  • Water management, i.e. consumptions, recycling, optimization of the process during his shift.
  • Quantities of spoil produced on a shift and ring basis.
  • Fulfilling Health & Safety responsibilities by adhering to the Align’s Health & Safety Policy and Management Plans.
  • Complying with all Company’s Policies and Procedures.
  • Undertaking other such reasonable duties appropriate to the role.

Skills & Experience

  • Ideally, some experience within the construction industry, slurry treatment plant, batch plant or wastewater treatment part.
  • A good practical understanding of Health & Safety requirements.
  • Ability to prioritise, plan, schedule and evaluate works.
  • Ability to work on shift 7/3, 7/4, 12h.


  • CSCS Card holder or happy to obtain prior to joining the business.
  • Full UK driving Licence.
  • Degree in Environment or Geotechnical Engineering, (This requirement can be substituted with an extensive proven track record of Construction experience).
  • Desirable - Membership of Construction or Manufacturing industry professional body.
  • Desirable - First Aider.


We're ready to invest in you and your future, and offer wide-ranging, performance-related progression opportunities. Our competitive rewards packages feature flexible benefits to fit your lifestyle and priorities.

We'd love you to join us in proudly building Britain's future heritage.

Apply online now.

Or, know someone who would be a perfect fit? Let them know!

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