Electrical Engineers - LV

Company: CTS Group

Location: Lisbon / Porto, Portugal

Work Model: Full-Time, 100% On-Site

Positions: Junior | Intermediate | Senior LV Electrical Engineer

Department: Electrical Engineering

Reporting to: Electrical Discipline Lead

About CTS Group

CTS Group is a fast-growing international Design & Build company specialising in Data Centre development across Europe, the Middle East and Africa (EMEA).

CTS combines engineering excellence, innovation and digital transformation to deliver high-performance, sustainable and future-ready Data Centre solutions.

With more than 40 nationalities represented across our teams, CTS provides a collaborative and international environment focused on technical excellence and innovation. The company delivers large-scale and complex Data Centre facilities for hyperscalers, colocation providers and enterprise clients.

About the Role

The LV Electrical Engineering team is responsible for the design and delivery of low-voltage electrical distribution systems for Data Centre and mission-critical facilities.

Depending on seniority, the role will involve supporting or owning LV electrical design packages from concept through IFC and as-built, including power distribution, protection and coordination, equipment selection, BIM/MEP coordination, technical documentation, testing and commissioning.

Key Responsibilities

• Design LV electrical distribution systems including:
• LV switchboards and distribution boards
• Switchgear
• Transformers
• UPS systems
• Standby generators/gensets
• PDUs
• Busbar systems
• Develop single-line diagrams, technical drawings, specifications, schedules and engineering documentation.
• Perform cable sizing, voltage drop and load-flow calculations.
• Perform protection and coordination studies and arc-flash assessments using ETAP or SKM PowerTools.
• Support or lead MEP/BIM coordination and clash detection using Navisworks.
• Coordinate LV containment with mechanical, structural and ELV systems.
• Develop and review LOD 400 models where applicable.
• Prepare/review RFIs, technical submittals and design packages.
• Coordinate with generator, UPS and switchgear vendors/OEMs.
• Support or lead testing, commissioning and integrated testing of LV systems.
• Ensure compliance with IEC 60364, IEC 61439, EN standards and Portugal's RTIEBT regime.
• Participate in design reviews, risk assessments and value-engineering/optimisation activities.
• Liaise with clients, vendors, certified electrical installers and relevant Portuguese authorities where required.

Experience Requirements

Junior LV Electrical Engineer

• 3–5 years of experience in LV electrical design, power distribution or MEP design.
• Experience preparing LV distribution layouts, cable sizing and technical drawings.
• AutoCAD Electrical proficiency.
• Working knowledge of Revit MEP and exposure to Navisworks.
• Basic understanding of protection and coordination concepts.
• Exposure to ETAP or SKM PowerTools is desirable.

Intermediate LV Electrical Engineer

• 5–10 years of experience in LV electrical design.
• Experience with mission-critical or Data Centre projects is preferred.
• Strong experience with LV distribution systems and electrical design packages.
• Experience with protection/coordination studies and arc-flash assessments.
• Proficiency in AutoCAD Electrical, Revit MEP and Navisworks.
• Experience with ETAP or SKM PowerTools.
• Working knowledge of UPS, generators/gensets, busbars and switchgear.
• Strong knowledge of IEC/EN standards and Portugal's RTIEBT.
• Experience coordinating vendors, stakeholders and multidisciplinary teams.
• Ordem dos Engenheiros membership or progress toward membership is an advantage/relevant to the role.

Senior LV Electrical Engineer

• 10+ years of LV electrical engineering experience.
• Proven experience leading LV design for Data Centre / mission-critical facilities.
• Experience acting as technical authority and providing design sign-off.
• Advanced knowledge of protection, coordination and arc-flash studies.
• Advanced proficiency in AutoCAD Electrical, Revit MEP, Navisworks and ETAP/SKM PowerTools.
• Expert knowledge of IEC 60364, IEC 61439, EN standards and RTIEBT.
• Strong understanding of UPS technologies, including Li-ion and VRLA, generators/gensets, MV/LV interfaces and switchgear.
• Experience with DGEG requirements and Portuguese electrical design responsibility.
• Proven experience with clients, authorities, vendors and OEMs.
• Strong leadership, mentoring and multidisciplinary coordination capabilities.

Education

• Bachelor's Degree in Electrical Engineering or a related discipline.
• Master's Degree is an advantage, particularly for Intermediate/Senior positions.
• Relevant professional registration/certification in Portugal is an advantage.

Technical Skills

Core:

• LV Electrical Design
• Power Distribution
• Switchgear & LV Switchboards
• UPS & Generators
• PDUs & Busbar Systems
• Cable Sizing
• Load Flow & Voltage Drop
• Protection & Coordination
• Arc Flash Studies
• MEP/BIM Coordination

Software:

• AutoCAD Electrical
• Revit MEP
• Navisworks
• ETAP or SKM PowerTools

Standards & Regulations:

• IEC 60364
• IEC 61439
• EN Standards
• Portugal RTIEBT
• DGEG requirements, where applicable

What We Are Looking For

We are particularly interested in engineers who have experience within:

• Data Centres
• Mission-Critical Facilities
• Large Commercial Projects
• MEP Engineering
• LV Power Distribution
• Complex Infrastructure Projects

Strong analytical, communication, problem-solving and stakeholder-management skills are essential.

What CTS Group Offers

• Opportunity to work on large-scale international Data Centre and mission-critical projects.
• International and multidisciplinary engineering environment.
• Exposure to projects across the EMEA region.
• Collaboration with experienced engineering, design, construction and project management teams.
• Career development and technical growth within an international Design & Build organisation.
• Opportunity to work with major electrical OEMs and technology providers.