Junior Engineer - Overhead/ Transmission HV Lines Engineer, T&D

Job Description

We are seeking a motivated Junior Overhead Line (OHL) Engineer – High Voltage Transmission to join our growing Transmission & Distribution team, supporting major transmission infrastructure and energy transition projects.

In this role, you will support the design and delivery of overhead transmission line systems, typically ranging from 110kV to 400kV+, contributing to projects from feasibility and concept development through detailed design and construction support.

You will work as part of multidisciplinary teams delivering grid reinforcement and renewable integration projects for Transmission System Operators, utilities, and infrastructure developers, while developing your technical skills under the guidance of senior engineers.

Key Responsibilities

1. Transmission Line Design

• Support the design and engineering of HV/EHV overhead transmission lines, typically 110kV–400kV+.
• Assist in the preparation of deliverables including route alignments, tower spotting, conductor and earth wire selection, and insulator configurations.
• Support the definition of clearances, right-of-way requirements and design criteria in accordance with applicable standards.
• Provide input to tower loading calculations and coordinate with structural design teams.
• Assist in the development and checking of PLS-CADD models and transmission line layouts.

2. Transmission Line Calculations and Technical Studies

• Support electrical and mechanical transmission line calculations, including:Conductor ampacity, corona and radio interferenceElectric field analysis, line impedance and shielding performanceSag–tension calculations, conductor blowout and clearance verificationLoading cases for wind, ice and temperatureTower loading trees and load combinations
• Assist with coordination between electrical and structural teams for tower and foundation design.
• Develop working knowledge of engineering analysis tools such as PLS-CADD and PLS-TOWER (or equivalent).

3. Project Engineering and Multidisciplinary Coordination

• Support the engineering delivery of overhead line projects across multiple project phases.
• Coordinate with structural, geotechnical, power systems and environmental teams under the direction of senior engineers.
• Assist with feasibility studies, route corridor assessments and technical evaluations.
• Contribute technical input to engineering deliverables, proposals and project documentation.

4. Standards, Compliance and Quality

• Support compliance of designs with relevant standards, including IEC, IEEE, EN/British Standards and National Grid / DNO specifications.
• Participate in design reviews, technical verification and internal QA processes.
• Apply Company quality procedures and learn from senior engineer feedback and design reviews.

5. Construction and Site Support

• Provide support during construction and installation activities, including tower erection, foundation works and conductor stringing operations.
• Assist senior engineers in resolving site technical issues and implementing design adjustments.
• Participate in site visits and inspections to develop practical understanding of overhead line construction.

6. Technical Documentation

• Prepare engineering documentation, including calculation notes, transmission line design reports, tower spotting reports and sag–tension charts.
• Assist in the preparation of technical specifications, BoQs and construction drawings.
• Ensure documentation is clear, accurate and suitable for design reviews, client approvals and project audits.

Qualifications

Qualifications & Experience

Education:

• Bachelor’s degree in Electrical or Structural Engineering.

Experience:

• 0–3 years of experience in overhead transmission line engineering, power systems, civil/structural engineering or a related field.
• Interest in or exposure to HV transmission line projects (110kV–400kV+).
• Familiarity with PLS-CADD modelling and sag–tension calculations is an advantage.

Technical Skills:

• Basic understanding of transmission line electrical principles, conductor behaviour, clearances and safety requirements.
• Willingness to develop skills in transmission line routing, tower spotting and technical calculations.
• Familiarity with PLS-CADD, PLS-TOWER or PLS-POLE is desirable but not essential.
• Strong analytical skills, attention to detail and a proactive approach to learning.

Nice to Have:

• Exposure to UK transmission or distribution projects.
• Familiarity with National Grid standards and technical specifications.
• Interest in EHV transmission line projects (400kV+).
• Working towards professional registration or chartership.
• Experience or interest in construction or site engineering activities.

Additional Information

At AECOM, we are committed to maintaining a secure and trustworthy recruitment process and take any fraudulent hiring activity seriously. To support this commitment, all newly hired employees are required to attend an in-person Day 1 onboarding at an AECOM office location as a condition of employment.

About AECOM 

AECOM is proud to offer comprehensive benefits to meet the diverse needs of our employees. Depending on your employment status, AECOM benefits may include medical, dental, vision, life, AD&D, disability benefits, paid time off, leaves of absences, voluntary benefits, perks, flexible work options, well-being resources, employee assistance program, business travel insurance, service recognition awards, retirement savings plan, and employee stock purchase plan. 

AECOM is the global infrastructure leader, committed to delivering a better world. As a trusted professional services firm powered by deep technical abilities, we solve our clients’ complex challenges in water, environment, energy, transportation and buildings. Our teams partner with public- and private-sector clients to create innovative, sustainable and resilient solutions throughout the project lifecycle – from advisory, planning, design and engineering to program and construction management. AECOM is a Fortune 500 firm that had revenue of $16.1 billion in fiscal year 2025. Learn more at aecom.com. 

What makes AECOM a great place to work 

You will be part of a global team that champions your growth and career ambitions. Work on groundbreaking projects - both in your local community and on a global scale - that are transforming our industry and shaping the future. With cutting-edge technology and a network of experts, you’ll have the resources to make a real impact. Our award-winning training and development programs are designed to expand your technical expertise and leadership skills, helping you build the career you’ve always envisioned. Here, you’ll find a welcoming workplace built on respect, collaboration and community - where you have the freedom to grow in a world of opportunity. 

As an Equal Opportunity Employer, we believe in your potential and are here to help you achieve it. All your information will be kept confidential according to EEO guidelines.