Mechanical Design Engineer

Trant Engineering Ltd; Southampton; On-site; GBP 40,000 - 55,000; Full time

Benefits offered by this job

Hybrid working

Competitive salary package

Company car or car allowance

Pension scheme

Career development support

Job summary

Trant Engineering Ltd. is seeking a Mechanical Design Engineer to join our Southampton team. The role focuses on applying advanced engineering principles to design, manage, and deliver projects of moderate complexity, while mentoring junior staff and coordinating multidisciplinary teams.

The position requires leadership, independent judgment, and a commitment to sustainability and professional standards. It offers hybrid working and a strong benefits package within a growing EPC contractor

Qualifications

• 3–5 years of relevant engineering experience, including design and coordination.
• Proven ability to mentor junior staff and manage multidisciplinary teams.
• Experience with design and project delivery in EPC context is a plus.

Responsibilities

• Designs complete projects, systems, components, or processes.
• Prepares specifications, drawings, and project documentation.
• Mentors junior staff and coordinates multidisciplinary teams.
• Manages scopes, schedules and budgets with leadership.

Education

Higher Education (NVQ+)

Bachelor’s degree in Engineering or related discipline (Master’s preferred)

Membership of a Professional Engineering Institution

Tools

CSCS Card

SHEA Water Qualification

EUSR Water Hygiene Qualification

Job description

Mechanical Design Engineer

Application Deadline: 27 November 2026

Department: Mechanical

Employment Type: Permanent - Full Time

Location: Southampton

Reporting To: Robert Reeves

Description

Join Trant Engineering and help shape the delivery of complex, high-impact projects.

Trant Engineering is a leading EPC contractor with a strong reputation for delivering innovative engineering solutions across the UK and internationally. With over 1,000 employees and a £150m turnover, we’re growing—and now looking for an experienced Mechanical Design Engineer to play a key role in our project delivery teams.

The Role

As a Mechanical Design Engineer you would be applying advanced engineering principles and practices to design, manage, and deliver projects of moderate complexity. This position requires independent judgment, technical expertise, and leadership skills to oversee scopes, schedules, and budgets while ensuring compliance with professional standards and sustainability principles. The role includes mentoring junior staff, coordinating multidisciplinary teams, and maintaining effective communication with stakeholders.

What You’ll Be Doing

General Characteristics

• Applies broad knowledge of engineering principles and practices within a specific discipline.
• Independently evaluates, selects, and adapts standard techniques, procedures, and criteria for conventional projects with few complex features.
• Contributes to multidisciplinary teams and acquires general knowledge of related fields.
• Demonstrates sound judgment in adapting methods for non-routine aspects of assignments.
• Acknowledges and applies concepts of sustainability to engineering projects.

Technological Responsibilities

• Designs complete projects, systems, components, or processes.
• Prepares comprehensive specifications, drawings, and project documentation.
• Designs and conducts site investigations; analyses and interprets survey data.
• Formulates and solves engineering problems using standard and adapted methods.
• Oversees moderate projects or contributes to specific parts of large-scale projects.

Schedule, Project & Task Management

• Applies leadership and teamwork skills to plan, execute, and manage scopes, schedules, and budgets.
• Contributes to project meetings and presents specific aspects of engineering assignments.
• Develops an awareness of change management practices and commercial impact of decisions, incorporating this into design activities.

Management, Supervision & Guidance

• Assigns tasks to and directs junior members of project team (technical and non-technical staff).
• Interprets, organizes, executes, and coordinates detailed aspects of engineering work.
• Mentors direct reports and less experienced staff by providing guidance, explaining professional responsibilities, and reviewing work outputs.
• Receives general direction on key objectives and guidance on unconventional or complex problems when necessary.

Communication, Teamwork & Leadership

• Communicates effectively with both technical and non-technical audiences.
• Demonstrates empathy, critical listening, and conflict management skills.
• Advocates professionalism and respectful inclusion.

Core Values

Upholds and promotes the Company’s Core Values – Care, Trust, Respect and Sustainability.

What We’re Looking For

Essential

• Higher Education (NVQ+)

Desirable

• Bachelor’s degree in Engineering or related discipline (Master’s preferred).
• Membership of a Professional Engineering Institution
• CSCS Card or SHEA Water Qualification
• EUSR Water Hygiene Qualification

Experience

• Typically 3–5 years of relevant engineering experience, including project design and coordination.

Why Join Trant?

At Trant Engineering, we deliver complex, high-value engineering and construction projects across the UK. From process and water treatment to energy infrastructure upgrades, we play a key role in delivering and protecting critical national infrastructure – shaping the systems that communities and industries rely on every day.

Our teams design and deliver full EPC solutions, combining technical excellence with practical, hands‑on delivery. We offer end‑to‑end capabilities – from concept and design through to manufacturing, construction and commissioning utilising a continually evolving in‑house expertise. This means you’ll work on projects that are varied, challenging and genuinely impactful.

Our multi-disciplinary teams bring together specialists in civil, mechanical, electrical, process, instrumentation, and control & automation engineering, alongside our in‑house manufacturing of control panels, MCCs, PLCs and SCADA systems. With over 1,000 people and a strong, growing pipeline of work, it’s an exciting time to join Trant. We are committed to helping our people succeed through our Career Development Association, providing structured support, mentoring and clear pathways to help you reach your full potential.

Whether you’re starting out or looking to take your next career step, Trant offers the chance to develop, progress and make a real difference.

Our company benefits package includes.

• Competitive salary.
• Company car or car allowance (some levels).
• Mentored support within our ‘Career Development Association’, to work towards chartership.
• 24 days holiday (increasing with service) + 8 bank holidays.
• Options to buy additional holiday via salary sacrifice.
• Company Pension Scheme.
• Flexible working based on a ‘core hours’ system.
• 1 x Professional Membership paid annually.
• Hybrid working.
• Employee Assistance Program.
• Free onsite parking.
• Bike to Work Scheme.
• Discretionary annual bonus.