Germany can draw on Serbian engineering capacity for substations and power lines—but only if it exports work without exporting responsibility
Europe’s energy transition is usually discussed as a problem of capital, permitting and political will. Increasingly, however, it is also a problem of engineering capacity.
Germany needs new substations, reinforced transmission corridors and modern protection and control systems. It must connect renewable generation while replacing ageing infrastructure. Yet the engineers capable of designing these assets are scarce, project pipelines are crowded and approval requirements continue to grow.
One response is to look south-east. Serbia has a substantial engineering base, competitive costs and experience in power systems, civil structures and overhead-line design. It is close enough to Germany for frequent travel, operates within the same working day and has a technical culture shaped by European standards.
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The proposition appears straightforward: move part of the engineering workload to Serbia and have the final documents verified by a suitably qualified engineer in Germany.
In principle, this is possible. In practice, the phrase “final verification” conceals most of the difficulty.
Germany does not have a single national equivalent of the American professional engineer’s stamp for every electrical drawing. The required authority depends on the document, the federal state and the approval procedure. Structural calculations, building submissions and fire-safety documents may require registered designers or independent checking engineers. Much electrical design is instead governed through company responsibility, contractual appointments, grid-operator approval and compliance with VDE rules.
The governing legal principle is nevertheless clear. Section 49 of Germany’s Energy Industry Act requires energy installations to be safe and to follow the generally recognised rules of technology. Compliance with VDE technical rules creates a presumption that this obligation has been met.
Nothing in that principle says every calculation must be performed in Germany. It does mean that the entity releasing the design must be able to demonstrate how compliance was achieved.
That distinction creates a viable operating model: engineering production can cross borders, but accountable engineering authority cannot.
A Serbian subcontractor may prepare equipment layouts, cable schedules, protection drawings, bills of quantities, tower calculations, line profiles and foundation designs. It may even perform much of the specialist analysis. But the German or EU prime contractor must establish the design basis, determine which standards and national annexes apply, manage the interfaces with authorities and network operators, and control the release of final documents.
The Serbian company must operate as part of an integrated design office, not as a remote drawing factory.
This is particularly important because a German signature cannot cure an inadequate engineering process. A reviewer who receives hundreds of drawings shortly before a deadline, without access to the underlying models or assumptions, is not meaningfully verifying the design. The arrangement may look compliant while transferring substantial liability to someone who has little practical control.
A defensible system begins before the first drawing is produced.
Each deliverable should have an identified originator, checker, approver and, where necessary, statutory signatory. The project should maintain a controlled register of German law, DIN and VDE standards, German national annexes and network-operator requirements. Calculation software and versions should be approved. Design inputs should have recorded owners and status. Native calculation files—not just exported PDFs—should remain accessible to the responsible engineering organisation.
Two management channels are required.
The project-management channel controls scope, resources, schedule, interfaces and commercial change. Its central tools are the deliverable register, integrated programme, responsibility matrix, interface register and decision log. Progress must be measured by completed and accepted outputs, not hours consumed.
The quality-management channel controls competence, checking, compliance, configuration and evidence. It should have a separate escalation path and the authority to stop the release of documents. A schedule problem must not be allowed to erase an independent technical check.
Not every document needs the same level of scrutiny. Routine schedules or drawing updates may be suitable for self-checking and sample review. Equipment sizing and control schematics require documented peer checking and German discipline review. Tower stability, foundations, earthing safety, short-circuit forces and protection settings deserve independent verification, sometimes including a separate calculation.
This risk-based approach is more credible than either extreme: duplicating every Serbian engineering hour in Germany, which destroys the commercial case, or trusting all work equally, which creates unacceptable exposure.
The benefits are real. Serbia can provide capacity that is difficult to recruit quickly in Germany. Work can proceed in parallel across projects and disciplines. Standardised packages can be scaled across a programme of substations or transmission lines. Geographic proximity makes workshops and site visits practical.
Cost savings, however, are less automatic than procurement presentations suggest.
Lower hourly rates can be consumed by incomplete inputs, repeated reviews, translation problems and poorly managed interfaces. The largest source of rework is often not technical incompetence but organisational distance: the Serbian team designs against one assumption while the German project manager, equipment supplier or network operator works against another.
The relevant metric is therefore total accepted engineering cost, not the subcontractor’s hourly rate.
There are also procurement considerations. A Serbian company bidding directly for a regulated utility contract may not possess the same EU-law rights as an operator from an EU member state or a country covered by an applicable reciprocal procurement agreement. The European Court of Justice confirmed in its 2024 Kolin judgment that operators from non-covered third countries cannot automatically claim equal treatment under the EU utilities procurement directive.
Subcontracting through a German or EU prime is often more practical, but it must be transparent. Tender conditions may require the subcontractor to be disclosed, its competence demonstrated and changes approved. Security-sensitive grid information may also be subject to contractual or regulatory restrictions. An EU prime cannot use a Serbian subcontract to evade requirements that would apply to a direct Serbian bidder.
The most prudent route is gradual.
The German firm should first qualify the Serbian partner’s personnel, systems, references and insurance. It should then run a bounded pilot package with measurable acceptance criteria. Only after observing first-pass quality, rework, communication costs and response to review comments should the model be expanded.
Successful pilots can evolve into a binational engineering office with common templates, shared software environments and stable discipline leads. At that point, the advantage is no longer merely cheaper production. It is the creation of an engineering platform capable of serving a portfolio rather than one project at a time.
Contracts must support that ambition. The Serbian firm should be required to provide editable models and calculation files, preserve records, accept audits and obtain approval before further subcontracting. Intellectual-property rights must allow the asset owner to operate and modify the installation throughout its life. Professional indemnity insurance must cover the territory, activities and subcontracted work involved.
Cybersecurity deserves equal attention. Substation layouts, protection settings, network models and control-system architecture are not ordinary design data. Access should be classified, limited and logged. The ability to send a file abroad should not be confused with permission to do so.
Europe’s infrastructure challenge makes distributed engineering increasingly attractive. But the dividing line between intelligent nearshoring and reckless outsourcing is narrow.
The organisations that succeed will not be those that transfer the largest number of drawings to Serbia. They will be those that create one design basis, one controlled configuration and one visible chain of engineering authority across both countries.
Serbia can supply the capacity. Germany must retain the judgment.
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