In-House Engineer or Project-Based Consulting?

Short answer: if your workload is permanent, full-time and concentrated in a single discipline, tenure; Consulting is better if it requires discrete, project-based and multiple expertise — and for many SMEs, the healthiest model is hybrid, complementing the core team with project-based expertise. This decision is not an ideology but a capacity planning question: how are the engineering hours you need distributed throughout the year and what specialties do they consist of? The decision in this article; We consider it on the axis of total cost, workload profile and risk..

How to Compare Actual Cost?#

The most common mistake is to compare the consulting fee to the engineer's gross salary; No two numbers measure the same thing. The total cost to the employer adds employer social contributions and non-wage items to the gross wage.. Eurostat's definition of labor cost According to total labor cost; In addition to wages and salaries, it also includes the employer's social security contributions, recruitment and training expenses. To give you an idea of ​​scale: Eurostat's 2025 data According to data, non-wage items constitute an average of 24.8% of total labor costs across the EU, and there are large differences between countries. Rates in Türkiye are not within the scope of this data; you should make your own comparison with your current payroll items.

Apart from payroll, there are also invisible items of staffing: CAD/analysis software licenses, hardware, training, the hiring process, and the time between when the position is filled and becomes productive. In consultancy, these items are included in the service price; In return, the hourly figure is higher. The fair comparison is between the total annual cost of the two models and your actual annual engineering need, not by "salary × 12".

On Which Axes is the Decision Made??#

The heaviest row of the table is the first one. The workload that cannot fill a full-time engineer is considered as idle capacity in the staff; Peak loads that the staff cannot handle are billed as delays.. In our bottleneck article The principle also applies here: it is necessary to plan the capacity according to the actual load profile, and not according to the average.

Which Jobs Are Suitable for Which Model??#

Jobs available for staffing: Living technical ownership of your product — ongoing revisions, customer technical support, day-to-day coordination with production. In these jobs, context information accumulates every day and is expensive to turn over..

Works suitable for project-based consultancy: Works that require special expertise with a defined beginning and end: one FEA verification, modal analysis, bottleneck study of a line, Transition plan from prototype to mass production or concept design of a new machine. The expert recruited for these jobs either remains idle or moves to a non-specialist job when the project is completed..

Hybrid model: The core team carries the continuity in the product; Peak loads and niche specializations are taken on a project basis. The critical requirement is to document the flow of information between the two parties — the consultant's output must remain internal as reports, models and accounting files.

What Information Should You Prepare When Getting Consultancy??#

The efficiency of project-based work begins with the definition of the job:

1. Problem statement: Not "We want analysis"; "This part is breaking in the field, we want the reason and solution."
2. Available data: Drawings, models, field data, historical fault records — share it all from the start.
3. Decision maker and process: Who will evaluate the output, at which meeting will the decision be made??
4. Timeframe: Determine actual deadlines; "urgent" means different things to everyone.
5. Delivery expectation: Report, model, production-ready drawing? Effect of scope on price The machine design service price is in our article. We discussed in detail.

Risks and Red Flags#

On the consulting side:

• No information transfer: If you do not have an auditable report, source file and account at the end of the project, it means that you have purchased a dependency..
• Non-scoped contract: If the delivery list and revision rule are not written, the dispute is scheduled.
• Consultant who accepts every job: The supplier, who also undertakes non-expertise, invoices you for the learning cost.

On the staff side:

• Dependency on one person: If all product knowledge is concentrated in a single engineer, resignation is not a personnel incident but a business continuity risk; Documentation culture is a must.
• Idle capacity blindness: It is invisible because the staff cost is fixed; It should be measured how much of the engineer's time is spent on value-added work.
• Erosion of expertise: The engineer working alone becomes isolated over time without peer review and access to current methods; A second eye mechanism should be established in critical accounts.

Frequently Asked Questions#

We are a small manufacturer; Should we hire our first engineer or start with a consultant??#

List your workload: if daily production coordination is heavy, it is less risky to start with staffing, if defined development projects are heavy, it is less risky to start with consultancy. It is easier to start with consulting and hire when the volume of work fills the staff than vice versa.

Does the consultant company learn our knowledge and pass it on to the competitor??#

A non-disclosure agreement (NDA) is standard and must be signed. The real assurance is the consultant's business model: for a consultancy that lives on references, customer confidentiality is a commercial asset.

How to ensure control of work in project-based work?#

With phased deliverables: concept, interim report, final. At each stage the output is seen and the direction is corrected. Avoid single-deliverable "black box" projects.

Wouldn't there be conflict between the consultant and the staff in the hybrid model??#

Not if the roles are clear: the staff is the product owner, the consultant is the expert on the specific problem. Conflict often arises when roles are not defined — this is management responsibility.

Conclusion#

The choice between staffing and consulting comes down to “which is cheaper?” not with the question, "How is my engineering need distributed over time and discipline?" It starts with the question. Continuous and single-disciplinary load indicates staffing, discrete and multi-disciplinary load indicates consultancy; Total cost comparison should be made with all employer items and idle capacity, not with gross salary. For most businesses, the answer is not one or the other, but a well-defined combination.

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Your engineering needs are growing, but you can't decide whether to hire a staff or outsource? Tactically maps your workload together; We reveal with a concrete plan which tasks should be carried out internally and which should be carried out on a project basis.. Our project consultancy service browse or contact us.

Resources#

• Hourly labor costs — Eurostat Statistics Explained (Total labor cost and share of non-wage items in the EU, 2025)
• Glossary: ​​Labor cost — Eurostat (formal definition of total labor cost to the employer and its components)