Madrid is for us a strategic entry point into the Spanish market — the country's financial and decision-making centre, where energy giants, telecoms and defence industry are headquartered. From Prešov it's a 4-hour flight via VIE or FRA to MAD Adolfo Suárez Barajas. We have no overland commute — Madrid is exclusively an air market and we calculate it as such.
Iberdrola, Telefónica, Indra — decision geography
In Madrid Iberdrola is based — the largest Spanish energy group and one of the global leaders in renewables. For an integrator with expertise in SiC power semi, battery storage and wind farm control, that means decisions are made here but physical realisation often touches Pamplona, Seville or Extremadura. Telefónica HQ — the largest IBM-Mobistar partner in the EU — is in the same layer: decisions in Madrid, physical rollout across all of Latin America and southern Europe. Indra Sistemas is a defence + IT + traffic systems player with strict SETSI process (authorisation of defence suppliers) and its own supplier audit geography.
For Airbus Defence and Space Getafe — production of military helicopters NH90 and Tigre — EASA Part-145 regime applies. For us it's the same category as LOK Košice: for clean non-security zones we're realistically deliverable, for internal aerospace workshops special clearance and a several-month onboarding are required.
Data centre hub — Equinix MD1-MD5
Madrid is one of the strongest data centre hubs in southern Europe. Equinix has five facilities in the city (MD1 through MD5), Telxius connects with Latin America via transatlantic cables (Marea, BRUSA), Interxion MRS operates carrier-neutral capacity for cloud providers. For us this segment is technologically directly transferable from the Romanian reference `edge-datacenter-telco` (Bucharest, 2024) and from `ai-cluster-research-lab` (Cluj-Napoca, 2025). DCIM via EcoStruxure IT, UPS Eaton 93PM, rear-door HX cooling for racks above 25 kW, fibre backbone CommScope or Corning — that's exactly what the Madrid DC hub continuously demands.
For AI clusters starting to emerge at R&D branches of American tech firms, NVIDIA HGX H200 / B200 infrastructure, InfiniBand NDR and Slurm/Pyxis orchestration are relevant.
Regulatory framework
Madrid operates under the national REBT (Real Decreto 842/2002, revised via RD 542/2020) and UNE-HD 60364 harmonised series. For building permits CTE — Código Técnico de la Edificación. For machinery UNE-EN 60204-1. For occupational safety Ley 31/1995 PRL plus RD 614/2001 specifically for electrical risk. For ATEX environments (Repsol peripheral refinery sites) transposition of 2014/34/EU via RD 144/2016.
In Comunidad de Madrid a regional authorisation layer adds: technical inspections via OCA (Organismos de Control Autorizados) accredited by ENAC, equipment registration via Industria de la Comunidad de Madrid, and specific requirements for high-risk equipment (ATEX, high-voltage substations, lifts).
Posted Workers and invoicing
For work in Madrid we need A1 from Slovak Social Insurance and comunicación de desplazamiento via REC (Registro de Empresas y Trabajadores) — electronic form, registration at least 5 days before work begins. Pay must comply with SMI €1,184/month (from 1 January 2025) and the convenio colectivo for the relevant sector — for electrical installation Convenio Colectivo Estatal de Industria, Tecnología y Servicios del Sector del Metal. Cross-border VAT via Art. 84 LIVA — reverse-charge mechanism, we issue without VAT with the note "Operación con inversión del sujeto pasivo".
Our commuting relationship
For Madrid we work exclusively by air with accommodation for 1 to 6 weeks within reach of the client. For repeat cooperation we'd set up a rolling-team regime — team rotates every two weeks, project runs continuously. Madrid is for us realistically the most demanding market in terms of personnel logistics and cost calculation: for a competitive bid we need a minimum two-week scope of work; shorter contracts don't cover the travel.
Which pillars fit best
For the Madrid data centre hub — **Data Centres + Software and AI**. DCIM rollout, AI cluster build-out, cooling design for rack densities above 30 kW. That's a segment where we have a directly transferable reference from Romanian projects.
For Iberdrola and the renewable energy ecosystem — **Electro + Automation** with focus on SiC power semi, battery storage controllers, and wind farm SCADA integration. Here Madrid functions as a decision point; physical execution is in Pamplona, Extremadura or Andalusia.
For Airbus, Indra and the defence segment — for clean non-security zones we're deliverable; for core aerospace work SETSI authorisation and a several-month onboarding are required, which we do only after the first confirmed client interest.
Conclusion — where we're opening up in Madrid
In Madrid we're in an active acquisition phase. Honestly — without a delivered Madrid project we don't yet have a local name, but the technology stack and process competencies for data centre, renewable energy and aerospace supplier work are directly transferable from our existing references in Romania, Austria and Slovakia. For the first Madrid client we're ready with a rolling-team regime and a two-week minimum scope of work.