About CTS Group
CTS Group SA is a fast-growing and dynamic company, specializing in the design and build of large-scale Data Centers across multiple countries, including Scandinavia, Europe, and the Middle East. CTS Group is rapidly expanding into other markets globally. In addition to D&B, we develop and produce digital systems tailored for the Data Center industry and standardized self-contained units. Our team of professionals, representing more than 40 different nationalities, fosters an inclusive and collaborative culture where innovation and excellence are at the heart of everything we do. Through our projects, we have built a strong reputation as a trusted partner in delivering some of the most advanced, efficient, and sustainable Data Center solutions in the region.

About the Role
We are looking for a detail-oriented and proactive Junior Electrical Engineer to join our Porto office. This role is key in designing and developing high-quality, reliable, and efficient electrical systems for Data Centers.

Key Responsibilities

• Support the design and development of electrical systems for Data Centers (power distribution, grounding, lighting, standby power) under the guidance of Senior or Lead engineers.
• Assist in creating single-line diagrams, electrical schematics, and panel schedules using EPLAN and Revit, on defined design tasks and drawing packages.
• Support power system analysis (short circuit, load flow, arc flash, protection coordination) using ETAP under supervision.
• Assist in developing lighting and emergency lighting designs using DIALux.
• Coordinate with multidisciplinary teams (mechanical, civil, architectural) on assigned scopes of work.
• Participate in peer design reviews and support compliance checks against international standards (IEC, IEEE, NEC, NFPA 70E).
• Prepare draft design documentation, specifications, and Bills of Quantities (BOQs) for review.
• Support RFI responses and site queries under supervision.
• Stay updated with emerging technologies and best practices in mission-critical power systems.

Required Skills and Experience

• Bachelor's degree in Electrical Engineering.
• Preferably proficient in or familiar with: ETAP (power systems modeling and analysis), EPLAN (electrical schematics and control panel design), Revit (BIM modeling and coordination), DIALux (lighting simulation and design).
• Strong knowledge of electrical codes and standards (NEC, IEC, IEEE, NFPA 70E).
• Familiarity with Tier classifications (Uptime Institute) and redundancy concepts (N, N+1, 2N).
• Experience in mission-critical environments (data centers, telecom, hospitals, etc.).
• Exposure to HV/MV substations, switchgear layouts, and BMS integration.
• Knowledge of digital twin concepts or energy monitoring systems is a plus.
• Excellent problem-solving, communication, and teamwork skills.
• Ability to manage multiple projects under tight deadlines.
• Proficiency in English (mandatory); other languages are an advantage.

Minimum Experience and Scope

• At least 3 years of relevant electrical engineering experience.
• Works under the guidance of Senior or Lead engineers on defined design tasks and drawing packages.
• Developing proficiency across EPLAN, Revit, ETAP, and DIALux.
• Supports RFI responses and site queries under supervision.

What We Offer

• Competitive salary package aligned with your professional experience.
• Health Insurance.
• Opportunity for professional growth and development.
• Continuous training and learning opportunities.
• A dynamic, professional, and collaborative work environment in Porto, with a diverse and inclusive team that values innovation and excellence. 
  
  If you have the profile we’re looking for, apply for the opportunity to join an excellent team and contribute to the success of a fast-growing international company.