Senior Engineer - Secondary Substations (T&D)

Company Description Work with Us. Change the World. At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, our work helps people and communities thrive. We are the world's trusted infrastructure consulting firm, partnering with clients to solve the world’s most complex challenges and build legacies for future generations. There has never been a better time to be at AECOM. With accelerating infrastructure investment worldwide, our services are in great demand. We invite you to bring your bold ideas and big dreams and become part of a global team of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and tangible impact around the world. We're one global team driven by our common purpose to deliver a better world. Join us. Job Description AECOM Enterprise Capabilities is seeking a talented for the Senior Engineer - Transmission & Distribution (Secondary) is responsible for the design and delivery of secondary engineering systems for High Voltage Substations, including protection, control, automation, and communication systems. The role is primarily focused on producing high-quality engineering deliverables across all project phases (FEED, Detailed Design, Construction, and Commissioning support), ensuring technical compliance, constructability, and reliable operation of the substation.

• Prepare and deliver secondary design documentation for HV Substations, including:
• Protection & control schematics
• Wiring and interconnection diagrams
• Cable schedules and termination drawings
• Protection single line diagrams and logic diagrams
• Panel layouts and equipment arrangements
• Develop protection and control philosophies and contribute to Basis of Design documentation.
• Perform engineering design of AC/DC auxiliary systems, control circuits, interlocking, and automation interfaces.
• Support relay configuration and protection scheme design (distance, differential, overcurrent, busbar, transformer protection, etc.).
• Ensure designs are practical, buildable, and aligned with project scope, schedule, and budget.
• Work closely with the Project Engineer and/or Project Manager to support engineering planning, deliverables tracking, and technical coordination.
• Support projects across all phases: tender, design, construction, testing, and commissioning.
• Provide technical input for engineering estimates, change management, and technical risk mitigation.
• Coordinate with primary, civil, and SCADA/telecom disciplines to ensure integrated and clash-free design.
• Prepare and maintain high-quality engineering documentation, including:
• Design reports and calculations
• Protection philosophies and relay setting inputs
• Technical specifications and material requisitions
• Perform self-checks and peer reviews of engineering deliverables to ensure accuracy and compliance.
• Support factory acceptance testing (FAT), site testing, and commissioning documentation when required.
• Provide engineering support during construction, energization, and commissioning phases.
• Assist in resolving technical issues related to protection, control, and secondary systems.
• Provide limited technical guidance to junior engineers when needed, without formal mentorship responsibility.
• Ensure all designs comply with:
• International standards (IEC, IEEE)
• Utility and client technical specifications
• Company engineering procedures and quality requirements
• Maintain awareness of industry developments and best practices in substation secondary engineering.

Qualifications Minimum Requirements

• Electrical Engineer + 4 YORE or demonstrated equivalency of experience and/or education
• Proven experience in Secondary Systems Engineering mainly for HV/EHV Substations.
• Proven experience delivering secondary design packages for EPC / Design-Build substation projects.
• Exposure to International standards (IEC, IEEE, ANSI, Australian Standards and Middle East region codes and standards) is preferred.
• Strong knowledge of: Protection & control systems, substation secondary circuits and interlocking, AC/DC auxiliary systems, Relay protection schemes and logic.
• Experience in producing complete secondary deliverables independently.
• Ability to coordinate across multiple engineering disciplines.
• English language is mandatory (Oral and written).

Preferable Requirements

• Overall 6+ years of work experience is preferred
• Master of Engineering degree (or equivalent education) in an appropriate engineering discipline from an accredited college or university.
• Strong focus on delivery, quality, and deadlines.
• Good coordination and communication skills within multidisciplinary project teams.
• Ability to work independently in a project delivery environment.
• Experience with relay families: ABB, Siemens, GE, SEL (configuration / mapping / settings input).
• Site commissioning or field engineering experience.
• Knowledge of SCADA systems and communication protocols (IEC 61850, Modbus, DNP3).
• Familiarity with control equipment: protection relays, PLCs, RTUs, concentrators, and bay controllers.
• Experience with engineering tools such as AutoCAD, EPLAN, ETAP.
• Understanding of IEC 61850 architecture and substation automation systems

Additional Information

• Relocation assistance is not available for this position.
• Sponsorship for Colombia work authorization is not available for this position, now or in the future.

_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. ReqID: J10146100 Business Line: Building Engineering Business Group: DCS Strategic Business Unit: Enterprise Capabilities Career Area: Engineering Work Location Model: On-Site