Sustainability Data Analyst

At ISS Tech Team, we create smarter workplace experiences through technology. Our Global Technology Solutions team builds digital solutions, from sensors and IoT devices to data, analytics and AI-driven capabilities, that support our ISS A/S operations across Cleaning, Workplace, Food and Technical Services.

With tech hubs in Copenhagen, Warsaw, and Porto, and teams collaborating across more than 30 countries, our ISS Tech team develops our digital solutions that have a real impact on both our customers and our people.

Location: Porto, Portugal

Work regime: Hybrid

What will you do as Data Analyst:  

• Provide day‑to‑day operational support for quarterly carbon data collection and input validation.


• Maintain strong data‑quality control at the input and pre‑processing stage to ensure smooth downstream reporting by the country decarb managers.


• Support the implementation of standardised validation checks, anomaly detection, and country follow‑ups.


• Assist in preparing clean, validated datasets for further analysis and reporting.


• Contribute to audit‑readiness by organising documentation and evidence.

Key qualifications:

Must have:

• Master’s Degree in Data or Environmental Science


• More than 3 years’ experience in data handling, environmental data, or similar analytical support roles.


• Strong skills in Excel, Power BI (basic visuals, data prep), and SQL (simple queries, data extraction).


• Experience with data cleaning, validation, and structured data workflows.


• English proficiency, both written and spoken. 

Nice have:

• Familiarity with emissions data or GHG concepts is an advantage but not required.


• Comfortable in repetitive, detail-oriented validation work.

Personal skills:

• Strong attention to detail and careful execution.


• Strong communication and reliability under time pressure.

What ISS Offers You:

We focus on creating an environment where you can grow and perform at your best:

• Permanent contract.


• Private health insurance.


• 22 days of annual leave + 3 additional company days to recharge.


• Flexible working hours and a hybrid model that supports balance and collaboration.


• Continuous learning opportunities (technical and behavioural development) to support your growth.


• Modern, well-equipped office in the heart of Porto.


• Free parking for your convenience.


• Access to ISS Tech Communities to connect, learn and share knowledge.


• Free access to the company gym to support your wellbeing.


• Snacks and drinks available at the office.

Why ISS

At ISS, we are more than just a service provider of cleaning, food, workplace and technical services, we are a partner in our customers’ success. By creating exceptional service moments and transforming workplaces into spaces where employees feel valued, engaged and productive, we enhance productivity and help our customers to attract talent and grow their businesses. This begins with our own people through training, career development, and a supportive culture – empowering them to deliver outstanding service. We know that when our people thrive, they create spaces where our customers’ employees and businesses thrive too.

ISS is a Place to Be You.

Be who you are. Become what you want. Be part of something bigger.

Become more. Become ISS.

ISS seeks to BE a place of belonging and CREATE places where every person is welcomed, embraced, and valued for exactly who they are. Places where people feel safe, respected, represented, and supported as their authentic selves.