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Horizon Presents at ICE South Wales Business Breakfast

Horizon was pleased to join with Knights Brown to present a brief summary of current legislation and best practice applicable to the management of surplus soil from development sites.  Case studies were used to illustrate both high performing projects and lessons that have been learnt, in particular the benefits gained from early team consultation in […]

Jamie Joins Horizon

We’re delighted to announce Jamie Howourth has joined Horizon.  Jamie is a Geoenviromental Engineer with a Masters Degree in Environmental Consulting from Plymouth University and will help expand our capabilities across the geoenvironmental engineering sector.

One Year Anniversary

Dr Hailey Tamblyn and Alex Large are celebrating their one-year anniversary with Horizon.  A year in and we’ve been overwhelmed by the support we’ve received and would like to thank everyone who has played a part in our successful first twelve months.    

SOBRA Register of Risk Assessors

Horizon Director Alex Large has been registered as a Fully Accredited SoBRA Risk Assessor on the Society of Brownfield Risk Assessment Register.  The SoBRA scheme has recently been developed to identify individuals possessing the critical technical, scientific and communication skills required to design, perform and/or critically evaluate land contamination risk assessments.


Horizon Director Dr Hailey Tamblyn successfully renewed her Landfill WAMITAB Continuing Competence Certificate in February 2017 thereby demonstrating her technical ability to oversee the operation of a waste facility under an environmental permit.

National Quality Mark Scheme for Land Contamination

Following introduction of the National Quality Mark Scheme for Land Contamination ( we are pleased to confirm that Horizon Director Alex Large has successfully passed the required examination and is now a “Suitably Qualified Person”.  The aim of the NQMS is to provide increased confidence and improved quality of submissions made under regulatory regimes, particularly […]

Horizon expands service offering

Dr Hailey Tamblyn and Alex Large have joined Horizon to broaden our geoenvironmental and geotechnical service offering.  Hailey is a Chartered Civil Engineer (CEng) specialising in advising clients on best value waste management options and supporting them to realise value from challenging sites.  Alex is a Chartered Water & Environment Manager (C.WEM) and a registered […]

Sector is “Global leader in cutting edge work”

The UK’s consultancy and engineering sector has a deserved reputation as global leaders in cutting edge work, and this goes beyond traditional design engineering. The businesses featured in this directory offer a wealth of professional services within the built and natural environment. From civil and structural engineering to transport planning, asset management to carbon reduction […]