Outsourced YGİS or an In-House Engineer: Which Should You Choose?

If you run a facility with its own substation, you need an engineer who takes legal responsibility for your medium-voltage system — deferring that decision isn't an option. But who fills that role has two different answers: contract with an outsourced YGİS provider, or hire a full-time electrical engineer in-house. Both satisfy the same legal obligation, but they work very differently in terms of operating cost, flexibility, continuity, and access to expertise. Getting this decision wrong either creates unnecessary fixed overhead or leaves the facility dependent on a single person's vacation schedule at the worst possible moment. This article covers the real operational differences between the two models, which facility profiles suit which option, and how to transition between them.

Two Models, the Same Legal Obligation

EKAT and OHS Law No. 6331 require every facility with its own substation to have an EMO-registered engineer take responsibility for operating its high-voltage system. The regulation grants freedom of choice in how this obligation is met: the responsibility can be held by a full-time in-house engineer, or by an outsourced, contracted YGİS provider. From an audit and registration standpoint, there's no legal preference between the two — what matters is that the responsible engineer's registration is current and that they actually perform the role. But the two models diverge sharply in day-to-day operation, cost structure, and how risk is distributed.

Cost Structure: Fixed Overhead vs. Variable Service

Hiring a full-time engineer creates a fixed cost line — salary, insurance contributions, leave and severance obligations, vehicle and equipment — that continues at the same level every month regardless of the facility's load. An outsourced YGİS service, by contrast, is a cost that scales with the contract scope; maintenance frequency and coverage can be adjusted to the facility's needs, and none of the fixed staffing costs (social security, severance, annual leave accrual) apply. For small and mid-sized single-substation facilities, a full-time engineer's workload often doesn't fill a full week — in that case, an outsourced service provides the same legal protection at lower fixed cost. For large, multi-site, or continuous-production facilities, the day-to-day operational integration of a full-time hire can become the more valuable factor.

The Continuity and Backup Problem

When you employ a single engineer, the facility is effectively without a responsible party whenever that person is on leave, sick, on military service, on parental leave, or leaves the job — legally this gap is unacceptable, but in practice it's exactly what happens at many facilities. Keeping a backup engineer on staff for a single-person position is usually not something the budget allows. An outsourced YGİS provider, by its nature, works with a team: another registered engineer who can step in if the primary contact is unreachable is already built into the contract. This is a decisive difference, especially in emergencies requiring fault response — the responsibility is never left vacant.

Access to Expertise: One Person or a Team

A single engineer deepens expertise in a particular area over their career, but the problems a facility can run into rarely fit into one specialty — protection relay coordination, short-circuit analysis, earthing system design, harmonics and reactive power issues, panels and MV cells each demand different technical depth. Working with an engineering firm effectively connects the facility not to one person, but to a team experienced across each of these areas. When a complex fault or unexpected engineering problem arises, a second opinion is available within the firm — that option doesn't exist in a single-person position.

Which Facility Profile Suits Which Model

Outsourced YGİS generally suits:

• Mid-sized production facilities with a single substation
• Businesses where electrical load isn't central to daily operations (warehousing, light industry)
• Growing companies that want to keep fixed staffing costs limited
• Facilities operating within an OIZ with easy access to local field support

Full-time engineer employment generally suits:

• Large facilities with multiple substations and a complex MV distribution system
• Businesses running continuous 24/7 production, where electrical reliability translates directly into production loss
• Facilities with daily operational engineering needs beyond electrical maintenance (energy efficiency projects, new line installation, field team management)
• Large industrial complexes with an existing technical team who want to add an MV responsible engineer on top

This isn't a hard rule — many mid-sized facilities move from one model to the other as they grow.

Scalability: Adjusting Scope as Demand Changes

Facilities don't stay static — a new production line comes online, an additional building is built, existing substation capacity is expanded, or the reverse happens: a section closes and the load profile shrinks. A full-time engineering position isn't flexible against these fluctuations: scaling the role down when workload drops isn't practical, and finding and hiring a new engineer when workload grows can take months. An outsourced YGİS contract can relatively quickly adjust its scope, visit frequency, and measurement depth to the facility's changing needs — scope expands when a new building comes online, and narrows when a section closes. This flexibility matters particularly for facilities in growth or restructuring phases; a fixed hiring decision can't adapt at the same pace as the facility's changing profile.

Administrative Load and Oversight Responsibility

Hiring a full-time engineer brings not just a salary burden but an administrative one: personnel management, performance review, tracking professional development, and monitoring EMO membership and certification renewals are all processes the employer has to run. Working with an outsourced YGİS firm shifts most of this administrative load to the provider — keeping the engineer's certifications current, professional competency, and internal training are the firm's responsibility. This difference is a meaningful time saving in practice, particularly for small and mid-sized businesses with limited HR capacity.

The Hybrid Approach: Combining Both

Some facilities keep an electrical technician or engineer on staff for day-to-day operational tasks on site, while formally tying the YGİS responsibility to an outsourced firm. This model preserves daily on-site presence while also securing continuity of the formal responsibility and access to broader expertise. It's a practical middle ground, particularly for growing facilities that don't yet justify a full-time senior engineer.

Transitioning from Outsourced to In-House

As a facility grows, it may want to move from an outsourced YGİS service to a full-time hire. Points to watch during this transition:

1. Plan the handover: the existing YGİS contract should continue until the new engineer's EMO registration and appointment are formalized — no responsibility gap should occur.
2. Transfer past records: maintenance history, measurement reports, and protection relay settings should be handed over to the new engineer in full.
3. Allow a transition period: it takes time for a new engineer to learn the facility and the specifics of the existing system; keeping advisory support from the former YGİS provider during this period reduces risk.

Transitioning from In-House to Outsourced

The reverse transition is also common — particularly when an engineer leaves, retires, or the facility downsizes. The biggest risk in this scenario is that the departing engineer's knowledge (system history, past fault records, custom settings) is lost from institutional memory. Starting with a new YGİS provider through a thorough facility assessment and taking over existing documentation minimizes this loss.

Questions to Ask When Deciding

• Is the facility's electrical load and MV system complexity substantial enough to justify a full-time position?
• How would a responsibility gap be closed in case of leave, illness, or departure?
• Is a second expert opinion accessible when a complex engineering problem arises?
• Does fixed staffing cost or variable service cost fit the operating budget better?
• If the facility is planning growth, will the need in three to five years look different from today?

Why the Scope of a YGİS Contract Matters

For facilities choosing an outsourced service, the contract's scope determines how this decision plays out in practice. A contract without a clear response-time commitment, maintenance frequency, and reporting discipline can't replicate the day-to-day proximity an in-house model provides. We cover this in detail in our YGİS contract scope and process guide. For the general definition and requirement of YGİS, see our YGİS Bursa guide.

Common Mistakes

• Deciding on cost alone: the cheapest option may fall short on continuity and access to expertise.
• Staying dependent on a single engineer with no backup plan: the most common risk in the in-house model.
• Leaving scope undefined in an outsourced contract: without a clear response time and maintenance frequency, none of the in-house model's advantages are actually realized.
• Switching models without planning the transition: creating a responsibility gap when moving from one model to the other carries both legal and operational risk.
• Ignoring the facility's growth plan: the model that fits today may fall short in three years.
• Not documenting institutional knowledge: relying on verbal handover of past fault and maintenance history when an engineer changes leads to knowledge loss.

FAQ

Does outsourced YGİS provide the same legal protection as a full-time engineer? Yes. Both models rest on an EMO-registered engineer formally taking on responsibility; there's no difference in legal validity.

Does full-time engineer employment make sense for a small facility? Usually not — at a mid-sized, single-substation facility, a full-time position's workload often doesn't fill a full week, making outsourced service more economical.

Who responds in an emergency under an outsourced contract? The primary engineer defined in the contract, or the backup engineer who steps in if they're unreachable, arrives within the committed response time.

Does the hybrid model suit every facility? No — it makes sense for facilities that need daily on-site presence but don't yet justify a full-time senior engineer.

How long does transitioning from one model to the other take? Typically a few weeks to a few months, depending on how well the handover is planned and how complete the documentation is.

Can multiple facilities be covered under one outsourced contract? Yes — for businesses with multiple sites or substations, scope can be expanded, with a separate maintenance schedule and reporting defined for each facility.

What's the biggest risk of full-time engineer employment? Lack of backup — the facility can be left effectively without a responsible party during the engineer's leave, illness, or departure.

Which model performs better in audits? Both are legally equivalent; what matters in an audit is that the responsible engineer's registration is current and that maintenance and reporting discipline is demonstrable.

Conclusion

The choice between outsourced YGİS and hiring your own engineer isn't a question with a right or wrong answer — it's an operating decision shaped by the facility's scale, growth plan, and risk tolerance. For small and mid-sized single-substation facilities, an outsourced service is usually the more flexible and economical solution; for large, complex, continuous-production facilities, the day-to-day integration advantage of a full-time hire can outweigh the cost. In either case, what matters is that continuity of responsibility and access to expertise are concretely secured.