Senior Geotechnical / Environmental Consultant

STM Environmental Consultants Ltd.; United Kingdom; Remote; GBP 65,000 - 90,000; Full time

Job summary

STM Environmental Consultants Ltd. based in Twickenham seeks a Senior Geotechnical / Environmental Consultant to lead site investigations, manage projects and mentor junior staff. You will liaise with regulators and clients, and help develop business opportunities.

The role requires 5+ years of relevant experience and a degree in Geo-Environmental Science or related field, with strong report-writing and communication skills.

Qualifications

• Geotechnical ground investigations experience
• Contaminated land risk assessments experience
• Strong technical report writing skills
• Experience managing projects and people
• Excellent client-facing communication skills

Responsibilities

• Project managing geo-environmental site investigations
• Producing and reviewing factual and interpretative reports
• Peer reviewing technical reports
• Liaising with Local Authority regulators
• Preparing quotations and supporting business development
• Managing and mentoring junior staff

Skills

Geotechnical ground investigations

Contaminated land risk assessments

Technical report writing

Project and people management

Client-facing communication

Education

Degree (BSc or MSc) in Geo-Environmental Science or related

Job description

Senior Geotechnical / Environmental Consultant

Posting Date - 20 Mar, 2026

STM Environmental Consultants is growing, and we’re looking for an experienced Senior Geotechnical / Environmental Consultant to join our team.

Based in Twickenham, we are a well-established geo-environmental consultancy delivering high-quality environmental and geotechnical solutions to a wide range of clients.

While STM operates independently with its own strong reputation and client base, we are also part of a wider group of geo-environmental companies. This means you benefit from the best of both worlds — the close-knit, supportive environment of a specialist consultancy, alongside the backing, collaboration opportunities, shared expertise, and increased project exposure that come from being part of a larger group.

At STM, you’ll take real ownership of projects from day one, working within a collaborative team that genuinely values professional growth and technical excellence.

The Role

You will lead and manage geo-environmental site investigations while playing a key role in client liaison, regulatory engagement, and business development.

This is an ideal opportunity for someone ready to step into (or further develop in) a senior position with project leadership and people management responsibility.

• Project managing geo-environmental site investigations
• Producing and reviewing factual and interpretative reports
• Peer reviewing technical reports
• Liaising with Local Authority regulators
• Preparing quotations and supporting business development
• Managing and mentoring junior staff

Skills & Experience Required

• Extensive experience in:
• Geotechnical ground investigations
• Contaminated land risk assessments
• Excellent technical report writing skills
• Experience managing projects and people
• Strong communication and client-facing skills
• Minimum 5 years’ relevant experience

Qualifications

• Degree (BSc or MSc) in Geo-Environmental Science, Engineering, or related discipline