Arya Arabshahi
Practice · Programme leadership

Case · Brussels and 112 cities · 2025 to present

NetZeroCities

NetZeroCities is the platform through which the EU Cities Mission supports 112 cities towards climate neutrality, delivered by a consortium of around forty organisations. I lead two of its work packages and sit on its Executive Committee.

Organisation
Eurocities, within the NetZeroCities consortium
Role
Programme Lead since January 2026 and Executive Committee member since April 2026. Strategy Advisor (Data) from January 2025.
Mandate
Two work packages with grant budgets of nearly €4m to 2030, delivered through task leads in ten partner organisations
Stage
Ongoing. The Action Explorer has been in beta since September 2026.
The Action Explorer interface, with filters, a map of European cities and a list of planned actions.
The Action Explorer, public beta, October 2026.

Leading through partners

The task leads who deliver my work packages sit in ten organisations, among them VTT, Politecnico di Milano, KTH, SEI, LGI, Metabolic, Climate-KIC and ICLEI, and each leads in their own institution. I set the priorities, budgets and delivery responsibilities of both work packages, and prepare options for the Executive Committee and the European Commission on Mission impact and on support for cities beyond the current grants.

A library before the services

When I joined Eurocities in January 2025, the cities' climate information sat with different partners, in plans, folders and tools that used different structures. I proposed a shared City Data Library and won the consortium's backing for it within sixty days. To pay for it I identified resources left unspent across grants and partners, built agreement on a plan to reprioritise them, and steered the build.

I designed the taxonomy, governance and data lifecycle that decide how city information is structured, maintained and reused. The library holds around 10,000 records, including investment-plan data for 72 cities, and every NetZeroCities service now draws its data from it.

Action Explorer

The Action Explorer is the first public service built on the library. I proposed its scope, wrote the brief, secured the resources and directed delivery with the partners who build it. Since its beta release in September 2026 it has made more than 5,500 planned city actions searchable on a map and by classification, so that a city can see what its peers intend to do. The figures it shows come from the cities' own plans and are presented as plan estimates.

Open the public demo
An action record for a planned waste-heat project in Aachen, with its description, classifications and projected emissions reduction.
An action record, with its classifications and the estimates from the city's plan.

Deciding what to build

New service proposals pass through a ledger and a stage gate I introduced, which settles demand, evidence, ownership and budget before resources are committed. I set its evaluation criteria and grant bounded pilot budgets to the services selected, to be scaled if they succeed. A service moves from idea to proof of concept to validated build with the evidence each step asks for.

Evidence of what the Mission changes

I lead the design of methods for tracking the Mission's progress through qualitative evidence, following how a city's planned action moves from plan, through programme support, to outcome. For this I developed the method and the task force for an AI-native knowledge infrastructure, built with partners on bespoke semantic knowledge graphs, to trace the progress of projects across support clusters that had worked apart. Its knowledge graph is in use across the consortium, and the tracing is in development.

Working across initiatives

I hold standing relationships with external partners and adjacent city-climate initiatives to align reporting and co-develop support for cities, including a disclosure-training curriculum prepared for more than 800 Mission-Minded Cities. In 2026 I curated and chaired a session on the credibility of city climate data at the EU Cities Mission Conference in Turin, with speakers from Munich, SEI and ICOS.

Credits

Eurocities within the NetZeroCities consortium. Software and data engineering by the implementing partners. Screens from the public Action Explorer demo, October 2026, showing estimates from the cities' plans.