Job Summary: Mace is seeking a Sustainability Manager to lead technical and strategic advisory services on decarbonization and sustainability for real estate portfolios and construction projects. Key Highlights: 1. Technical leadership and strategic sustainability advisory 2. Driving the transition to Net Zero Carbon models in the real estate sector 3. Development of decarbonization plans and eco-efficiency strategies Mace combines construction expertise with consultancy to unlock the potential of every individual and project, redefining the boundaries of ambition. Our values shape how we advise and define the people we want to join us on this journey. The Responsible Business department requires a Sustainability Manager for its Madrid office, with specific experience in energy, carbon footprint calculation, and decarbonization planning within the real estate sector. This position will play a key technical leadership and strategic advisory role for clients—particularly for real estate portfolios, new-build projects, and existing buildings—supporting them in their transition toward Net Zero Carbon models, compliance with ESG and regulatory frameworks. You will be responsible for: * Developing and leading short-, medium-, and long-term decarbonization plans, including retrofit strategies, electrification, and CAPEX and OPEX optimization. * Calculating organizational and asset-level carbon footprints (Scopes 1, 2 and 3\) in accordance with ISO 14064 and GHG Protocol, including defining reduction plans and tracking targets. * Applying CRREM to assess climate transition risks, align with decarbonization pathways, and evaluate stranded asset risk. * Providing technical advisory on energy efficiency improvement. * Integrating and analyzing renewable energy solutions for buildings and real estate portfolios (photovoltaics, aerothermal, geothermal, self-consumption, PPAs, procurement of renewable electricity). * Leading and participating as technical lead in ESG Due Diligence (ESGDD), with focus on energy, emissions, and improvement opportunities. * Providing technical advisory on green financing and regulatory compliance. You will need to have: * A technical education, preferably in Industrial Engineering, Energy Engineering or similar, with solid knowledge of building installations and energy systems. As an energy and decarbonization expert, you bring demonstrable experience in: * Carbon footprint calculation in accordance with ISO 14064 and GHG Protocol. * Energy analysis and eco-efficiency strategies for real estate assets. * Energy simulations (DesignBuilder, HULC, IES). * Integration of renewable energy in the built environment. * Development of decarbonization plans, investment optimization, and cost-benefit analysis. * Knowledge of the energy sector, providing technical support in energy audits and participation in the development and evaluation of energy generation projects (especially applications in the real estate or industrial sectors). * Experience with or familiarity with CRREM and the EU Taxonomy. * Knowledge of sustainability certifications (LEED, BREEAM). * Experience with ESG standards and indices (GRI, EPRA, PRI, CDP, SBTi). * Knowledge of green financing, including energy savings certificates. We are looking for an organized, methodical, highly proactive individual with leadership capability, accustomed to working under tight deadlines and in direct contact with clients. You must speak Spanish and possess an advanced level of English, both spoken and written. European travel is required. If you have experience in energy, decarbonization and energy transition applied to the real estate sector and wish to grow professionally, seize the opportunities Mace can offer you. Request a confidential conversation now. Our Values Safety First – Going home safe and well: We promote a safe, diverse and inclusive workplace, recognizing the importance of wellbeing across all teams. Client Focus – Delivering on our promise: We take responsibility for deliverable quality, strategic outcomes, and building lasting client relationships. Integrity – Always doing the right thing: We positively influence our industry, consistently meeting all compliance obligations. Creating Opportunity – Enabling our people to excel: We foster a culture of continuous improvement across all activities, inspiring our people and teams to develop. Mace is an inclusive employer and welcomes interest from candidates of diverse backgrounds. Even if you feel you do not meet all the requirements, we encourage you to apply, as you may be the ideal candidate for this or another role within our organization. We are also open to considering part-time, flexible and hybrid working arrangements, where appropriate for the role. \#LI\-Onsite