Geotechnical Engineer Geologist
Geotechnical engineers and engineering geologists work out what the ground beneath a proposed structure is actually made of and how it will behave once you build on it, dig into it or tunnel through it. They plan and supervise site investigations (boreholes, trial pits, lab testing of soil and rock), interpret the results, and advise designers on foundations, retaining walls, slopes, embankments and earthworks. Most work for engineering consultancies, specialist ground investigation contractors or civil engineering contractors, serving clients in infrastructure, housing, energy, water and land development.
- Starting salary
- £25k–£32k
- Live graduate jobs
- 11 open now
- Main way in
- Graduate scheme at a multidisciplinary engineering consultancy
- They usually ask for
- A degree in civil engineering, geology, earth sciences…
Approximate graduate salary
Typically around £25,000–£32,000 to start, though this varies widely by employer type, region and whether you hold an MSc. Consultancies in London and large infrastructure employers tend to sit at the higher end; smaller regional ground investigation firms often lower, sometimes offset by site allowances and overtime, which can add meaningfully to take-home pay in site-heavy roles.
1What you'd actually do
- Logging soil and rock samples on site or in a core store - describing colour, strength, grain size, fracturing and so on to the relevant British Standard, which is a surprisingly large part of the first year or two
- Supervising a drilling rig or trial-pitting crew at a site investigation: checking the driller is following the specification, scheduling samples and in-situ tests, keeping daily records and dealing with the unexpected (buried obstructions, water strikes, contaminated ground)
- Writing up factual and interpretative ground investigation reports - the factual report presents the data, the interpretative report says what it means for the design
- Doing geotechnical design calculations: bearing capacity and settlement for foundations, slope stability, earth pressures on retaining walls, pile design - usually in Excel and in specialist software, checked against Eurocode 7 (the European design standard for geotechnical work used in the UK)
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- Desk studies: pulling together geological maps, historic Ordnance Survey maps, borehole records, mining and landfill records to build a preliminary picture of a site and flag risks before anyone goes near it
- Reviewing laboratory test schedules and results - triaxial tests, consolidation tests, particle size distribution, chemical testing for contamination and concrete attack
- Attending design team meetings and answering queries from structural engineers, contractors and clients, often about why the ground is not behaving as assumed
2How graduates get in
- Graduate scheme at a multidisciplinary engineering consultancy - the most common structured route, usually with rotations or a defined training plan aimed at chartership. Recruitment typically runs in the autumn for the following September.
- Direct entry as a graduate geotechnical engineer or graduate engineering geologist with a specialist geotechnical consultancy or ground investigation contractor. Very common, often advertised year-round rather than on a graduate-scheme cycle, and frequently a faster route to hands-on site experience.
- Site-based entry with a ground investigation contractor, sometimes as a 'site engineer' or 'logger' first. This is a well-trodden route and not a lesser one - lots of senior geotechnical people started logging boreholes in the rain.
- MSc conversion or specialisation - an MSc in Engineering Geology, Geotechnical Engineering, Soil Mechanics or Hydrogeology. Usual for geology and earth science graduates moving into engineering, and common (though not always essential) for civil engineering graduates who want to specialise.
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- Summer placement or industrial year with a consultancy or GI contractor during an undergraduate degree - strongly advantageous, and placements often convert into graduate offers.
- Degree apprenticeship routes into civil engineering exist and can lead into geotechnics, but they are less common in this specialism than in general civils.
3What employers ask for
- A degree in civil engineering, geology, earth sciences, engineering geology or geotechnical engineering. The subject genuinely matters here - this is not a role open to any discipline. Broadly, civil engineering graduates enter as geotechnical engineers and geology graduates as engineering geologists, though in practice the two job titles overlap heavily and many employers use them loosely.
- Most employers ask for a 2:1, though a 2:2 with a relevant MSc, a placement year or strong site experience is often accepted, particularly by smaller consultancies and GI contractors.
- An accredited degree matters if you want chartership: CEng (Chartered Engineer) routes usually need an accredited MEng or BEng plus further learning, while geology graduates more often go for CGeol (Chartered Geologist) through the Geological Society. Check accreditation before committing to an MSc.
- A full UK driving licence is asked for far more often than in most graduate jobs, because site work means driving to remote sites with equipment. Some employers treat it as essential.
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- Willingness to work on site in all weather and to stay away from home - many roles involve nights away, sometimes weeks at a time.
- A CSCS card (Construction Skills Certification Scheme, the standard UK construction site access card) and basic site safety training are usually arranged by the employer in the first few weeks rather than required up front.
4Skills that matter
Soil and rock description to BS EN ISO 14688/14689
Everything downstream - the design, the cost, the risk - rests on whether the ground was described correctly in the first place, and getting it wrong is expensive.
Geotechnical design calculation and Eurocode 7
You need to turn test data into defensible numbers for bearing capacity, settlement and stability that a structural engineer can actually design to.
Reading geological and historic maps
Desk study work means spotting made ground, old quarries, mine workings, landslips or buried watercourses from documents before the drilling rig arrives.
Technical writing
Reports are the product - a client pays for a document that clearly states what the ground is and what it means for their scheme, and vague writing creates liability.
Site supervision and dealing with contractors
As a graduate you are often the only person from your firm on site, telling an experienced driller what you need while keeping the programme and safety on track.
Judgement under uncertainty
You are characterising an entire site from a handful of holes, so knowing how much weight the data can bear - and when to say you need more - is the core professional skill.
Numerical and analysis software
Day-to-day work uses geotechnical data management systems (AGS data format is the UK industry standard), slope stability and finite element packages, and a great deal of Excel.
Putting these on a CV? We counted which skills 12,914 live graduate adverts ask for, and what to do with the answer — part of our application advice.
5Where it leads
Graduate / assistant engineer or geologist: heavy on site supervision, logging and factual report writing, with calculations gradually added. Typically the first two to three years, though this varies by employer and how much site work comes your way.
Working towards professional registration - CEng through the Institution of Civil Engineers, IEng, or CGeol through the Geological Society. Most people achieve this somewhere around four to six years in, but the timeline genuinely varies a lot depending on the breadth of experience you can evidence.
Geotechnical engineer / engineering geologist: running your own smaller site investigations, doing interpretative reporting and design, checking juniors' logs, starting to deal directly with clients.
Senior / principal: leading on bids and fee proposals, signing off designs, managing teams, acting as the technical point of contact on large infrastructure projects. Some people move towards project management and away from calculations at this point.
Longer term the paths diverge - technical specialism (tunnelling, ground improvement, slope engineering, contaminated land, offshore geotechnics for wind farms), associate/director roles in consultancy, client-side roles with infrastructure owners or developers, or moving into the contracting side. Offshore and tunnelling work in particular tends to pay a premium and attract people with strong geotechnical backgrounds.
What people get wrong
“It's an office-based design job like structural engineering.”
Early years are often predominantly site-based, outdoors, in poor weather, with early starts and periods living in hotels near sites. Some people love this and some leave because of it - find out the site/office split before you accept an offer, because it varies enormously between a design consultancy and a ground investigation contractor.
“'Geotechnical engineer' and 'engineering geologist' are two clearly different jobs with different career ladders.”
In UK practice the job titles are used inconsistently and the work overlaps heavily. The more meaningful difference is your route to chartership - engineering-accredited degrees point towards CEng, geology degrees towards CGeol - and many teams contain both doing similar tasks.
“Geotechnics is a narrow backwater of civil engineering.”
Ground risk is consistently one of the biggest sources of cost overrun and delay on construction projects, so geotechnical advice sits early and influentially in the design process. It is also central to growth areas like offshore wind foundations, tunnelling, flood defence and brownfield redevelopment.
“You just run the numbers and the software gives you the answer.”
Ground is variable and you never have complete data, so the job is about interpretation and engineering judgement. Two competent engineers can reasonably reach different conclusions from the same borehole logs, and defending your interpretation is part of the work.
6Where this varies
The biggest split is consultancy versus contractor. Specialist ground investigation contractors are site-heavy, fast-moving and get you logging and supervising from week one; large multidisciplinary consultancies give you more structured training, more design and analysis work and more exposure to major projects, but potentially less time on site. A third option is client-side or asset-owner roles (rail, water, highways) which are more about reviewing and commissioning others' work. Geography matters too - work clusters around major infrastructure programmes and around coastal and port hubs for offshore wind geotechnics, so roles in Scotland, the North East and East Anglia often have a strong offshore or energy flavour, while London and the South East skew towards deep basements, tunnelling and brownfield redevelopment. Mining-legacy regions (South Wales, the Midlands, Yorkshire, the North East, Cornwall) generate a lot of specialist work on old workings and unstable ground.
General guidance about the role across the UK market, not about any specific employer. Entry routes and requirements vary — always check the individual job advert.