About CTS Group

CTS Group is a fast-growing international design and build company specialising in data center development across Europe, the Middle East, and Africa (EMEA). We combine engineering excellence, innovation, and digital transformation to deliver high-performance, sustainable, and future-ready data center solutions.

With over 40 nationalities represented across our teams, CTS fosters a collaborative, inclusive, and high-performance culture where innovation and technical precision drive every project. Beyond construction, CTS develops digital systems and standardised modular data center units to meet the evolving needs of hyperscalers, colocation providers, and enterprise clients.

Our proven track record and strong partnerships have established CTS as a trusted industry leader delivering large-scale, complex data center facilities with speed, efficiency, and excellence.

Role Overview

The Senior Electrical Engineer – Special Packages defines the technical strategy for specialist critical-power equipment packages across data center and mission-critical facilities, holds technical sign-off authority, and mentors junior and intermediate engineers.

The role leads vendor/OEM technical negotiations, owns compliance with IEC/EN standards and Portuguese regulatory requirements, and manages liaison with authorities, vendors, and clients from concept through commissioning, across CTS's EMEA project portfolio.

Key Responsibilities

• Define the technical strategy and specification approach for UPS/battery systems, standby generators, containerised/modular power modules, and specialist MV/LV switchgear packages.

• Provide technical authority and design sign-off for special package scope.

• Lead technical evaluation, negotiation, and selection of OEM/vendor packages (e.g., Schneider Electric, ABB, Vertiv, Eaton, Caterpillar, Cummins), including factory acceptance testing (FAT) strategy.

• Lead interface coordination between special packages and MV/LV switchgear, generators, and UPS/battery systems across the wider electrical design.

• Conduct design risk assessments and lead value-engineering/optimisation reviews for special package scope, including battery technology (Li-ion vs. VRLA) trade-off studies.

• Lead multidisciplinary MEP/BIM coordination and enforce modelling standards and BIM execution plans for special package rooms and yards.

• Oversee design and installation quality; lead commissioning, load-bank testing, and integrated systems testing of special package equipment.

• Mentor junior and intermediate engineers and review their design deliverables.

• Liaise with authorities having jurisdiction (AHJ), utility providers, OEMs, and clients on special package compliance and delivery matters.

Required Skills and Experience

• Bachelor's degree in Electrical Engineering; Master's preferred.

• 10+ years in electrical engineering with a strong focus on critical power packages, including experience leading mission-critical/data-center design.

• Expert command of IEC 60364, IEC 61439, EN standards, and Portugal's RTIEBT as applied to special package equipment and MV/LV interfaces.

• Familiarity with DGEG registration requirements in Portugal.

• Advanced proficiency across AutoCAD Electrical, Revit MEP, Navisworks, and ETAP or SKM PowerTools for interface and protection studies.

• Deep knowledge of UPS technologies (Li-ion vs. VRLA), generator/genset specifications, containerised/modular power systems, and MV switchgear interface requirements.

• Extensive experience negotiating and managing OEM/vendor relationships (e.g., Schneider Electric, ABB, Vertiv, Eaton, Caterpillar, Cummins), including FAT witnessing and commissioning leadership.

• Proven leadership, mentoring, and client/authority/vendor engagement skills.