Senior Mechanical Engineer – Downhole Tools

iO Associates; England; Hybrid; GBP 40,000 - 60,000; Full time

Job summary

Join a leading engineering company working on cutting-edge downhole technologies as a Mechanical Engineer. This role involves designing and developing tools for both Oil & Gas and geothermal sectors, contributing to innovative projects in a collaborative environment with strong support for technical growth.

Benefits

Flexible work environment

Career development support

Cross-disciplinary collaboration

Involvement in next-gen energy technologies

Qualifications

• Minimum 6 years of experience in mechanical design.
• Proven experience with downhole tools is essential.
• Hands-on experience with manufacturing methods and shop floor testing.

Responsibilities

• Designing mechanical assemblies for downhole applications.
• Substantiating designs with calculations and FEA analysis.
• Producing comprehensive documentation including design reports and test results.

Skills

Mechanical Design

Engineering Calculations

Analytical Expertise

Communication

Documentation Skills

Education

Degree in Mechanical Engineering

Tools

3D CAD Systems (Creo preferred)

FEA and CFD Interpretation

Job description

Job Title: Mechanical Engineer – Downhole Tools
Location: Bristol (Hybrid)
Salary: Competitive + Benefits
Type: Permanent Full Time (Monday–Friday, 37.5 hours/week)

iO Associates is proud to be partnered with a cutting–edge engineering company at the forefront of downhole technology development. As part of their continued growth into the geothermal and energy sectors, they are looking to expand their mechanical engineering team with an experienced Mechanical Engineer who brings specific experience with downhole tools.

This is a highly collaborative role within a multidisciplinary team tackling some of the industry's toughest engineering challenges–from high–pressure, high–temperature environments to mechanical dynamics, corrosion, and wear.

The Role:

As a Mechanical Engineer, you will play a key role in the design, development, and testing of downhole tools. You'll be expected to validate your work through engineering calculations, contribute to experimental setups, and participate in hands–on shop floor testing. This role requires both practical and analytical expertise, with opportunities to work on products used in both Oil & Gas and emerging geothermal markets.

Your Responsibilities Will Include:

• Designing mechanical assemblies for downhole applications

• Substantiating designs with calculations and FEA analysis

• Developing test setups and participating in test execution

• Producing comprehensive documentation (design reports, test results, specifications)

• Supporting manufacturing and suppliers with technical queries

• Reviewing and approving engineering drawings and specifications

• Collaborating across teams to enhance product reliability and innovation

What You'll Need:

• Degree in Mechanical Engineering

• Minimum 6 years of experience in mechanical design

• Proven experience with downhole tools is essential

• Understanding of materials, coatings, and mechanical properties

• Proficiency with FEA (static and dynamic) and CFD interpretation

• Hands–on experience with manufacturing methods and shop floor testing

• Excellent communication and documentation skills

• Familiarity with 3D CAD systems (Creo preferred)

Why Join?

• Work in a high–impact industry at the intersection of energy, innovation, and sustainability

• Be part of a supportive team that values technical growth and cross–disciplinary collaboration

• Enjoy a flexible and stimulating work environment with career development support

• Get involved in both established and next–gen energy technologies