Sending Engineers to Commission a U.S. project. What They Can and Cannot do on ESTA or a B-1 Visa

Your UK- or Ireland-based engineering and equipment supply firm’s newly acquired U.S. customer is waiting for the arrival of your installation and commissioning team.

HR Director, you are working with the project manager to arrange the team’s travel. Before booking, you need to establish whether the sales contract and each engineer’s proposed duties support travel as a business visitor.

All that’s missing is a clear, forwardable answer to the one question Operations has posed: “Can our engineers just go on ESTA or should it be a B-1?”

Can engineers commission equipment in the U.S. on ESTA or a B-1 visa?

Eligible engineers may perform certain commissioning tasks on ESTA or a B-1 visa when those tasks qualify as installation, servicing or repair of equipment purchased from a company outside the U.S. The sales contract must require the seller’s services, the engineer must possess unique knowledge essential to those services, and no U.S.-source remuneration is permitted. Hands-on construction and ordinary production work are excluded.

Can engineers commission a U.S. project on ESTA or a B-1? Why the answer feels unclear

• U.S. law lets business visitors come for business, but the visitor category excludes anyone “performing skilled or unskilled labor” (INA § 101(a)(15)(B)). Installation work sits on that line.

• CBP assesses each traveller’s eligibility at the port of entry or Preclearance. The explanation and supporting documents matter, but CBP also considers the traveller’s immigration history and other available information. A case may involve further questioning and supervisory review.
• Travelers on ESTA give up the right to review or appeal an officer’s admissibility decision (INA § 217(b)).VWP travellers waive rights to review or appeal an admissibility decision under the immigration statute. A refusal can disrupt travel and affect future eligibility. The next steps depend on the reason and how the case was recorded; obtain advice before arranging another trip.

In contrast, envision the process gone well: Each engineer can explain the visit in two sentences; the paperwork in their bag tells the same story. The aim is to give each engineer a clear understanding of the permitted duties, documents that support the actual assignment and a realistic travel plan. HR can then brief operations on both the proposed approach and the remaining uncertainties.

ESTA and B-1. What changes about the application and length of stay?

A B-1 visa application allows a consular officer to assess the proposed purpose before travel. CBP still decides admission. Neither a visa nor ESTA approval guarantees entry.

The list of permitted business activities is the same on ESTA and on B-1 visas. What differs is the length of stay, the pre-checking, and what happens if things go wrong…

Notes:

1. Some employers choose a B-1 visa even when ESTA is available: (A consular officer has looked at the purpose in advance, and stays are anticipated to run longer than 90 days.

2. Most first-time B-1 applicants should expect an in-person consular interview. Applicants should normally schedule their appointment in their country of nationality or residence and check the relevant embassy’s current instructions. Allow time for appointment availability, any additional processing and passport return.
    

The rule that makes installation work possible

U.S. State Department guidance allows a business visitor to “install, service, or repair commercial or industrial equipment or machinery purchased from a company outside the United States or to train U.S. workers to perform such services” (9 FAM 402.2-5(E)(1)).

• The four conditions:
  1. The equipment was purchased from a company outside the U.S.
  2. The contract of sale specifically requires the seller to provide the installation, servicing, repair or training.
  3. The engineer has unique knowledge that is essential to the seller’s contractual obligation.
  4. The engineer receives no remuneration from a U.S. source.

These conditions do not replace the general visitor requirements, including a temporary visit, an intention to leave and eligibility for admission.

Where commissioning fits, and where it doesn’t

1. “Commissioning” is a project description, not a separate immigration permission. Start-up, testing, calibration and fault-finding may qualify where they form part of permitted installation, servicing or repair and all relevant conditions are met. Each task needs assessment; the word “commissioning” in a contract does not establish eligibility.
2. Handover does not automatically make a later visit impermissible. Servicing or repairing equipment afterwards may still qualify under business visitor rules if the sales contract requires those services and all other relevant conditions are met. However, running the customer’s normal production line, covering for its operators or acting as its general maintenance staff falls outside permitted ESTA and B-1 business visitor activities. The actual duties and contractual arrangements determine the position.
3. State Department guidance also recognises certain specialised trainers under B-1. This covers temporary training or knowledge transfer to U.S. workers concerning industrial equipment, machinery or processes acquired or sourced from outside the United States, in support of a qualifying project. The trainer must have unique knowledge not widely available in the United States and receive no U.S.-source remuneration. B-1 visas issued under this provision must carry the annotation “B-1 SPECIALIZED TRAINER”.

 Check the contract before you check the visa.

Note: The most useful thing HR can do happens weeks before anyone books flights, and it is a conversation with the commercial team, not the travel desk.

Six questions to ask:

1. Who is the seller on the contract: the UK or Irish company, or a U.S. subsidiary or distributor?
2. Was the equipment bought, or is it leased or supplied under a service model?
3. Does the contract specifically require installation, commissioning or training by the seller, and does it describe the scope?
4. Are the engineers employed by the seller, or by a subcontractor or agency?
5. Is any later visit covered by warranty terms in the contract of sale, or by a separate service agreement?
6. Does the U.S. customer expect the team to do any building, electrical, pipework or structural work on site?

Caution: If any answer is “not sure” or “the U.S. company”, that is the point at which to take advice each of those answers can change the analysis.

Where business becomes work. What engineers cannot do

• Business visitors cannot personally perform building or construction work, whether on-site or inside a plant. Supervising or training others engaged in that work may qualify, but only if the traveller otherwise meets the B-1 requirements and does not personally perform the construction work.
• Productive work. Operating equipment to produce output, or filling a staffing gap at the U.S, company.
• U.S. pay. For these engineering visits, the traveller must not receive U.S.-source remuneration for the services. A U.S. customer may cover reasonable incidental travel and living expenses, within the permitted limits. Remaining on overseas payroll does not, by itself, make the proposed duties permissible.
• “Local employment or labor for hire” is not business (22 CFR 41.31(b)(1)).
• Open-ended scope: “stay until it’s working” is a red flag for both the 90-day ESTA limit and the purpose test.

Details that catch HR teams out

• Check each engineer’s passport nationality and individual eligibility. Working for a UK or Irish employer does not establish eligibility for the Visa Waiver Program. Nationals of other participating countries may also qualify. An engineer who cannot use the VWP will generally need an appropriate visa unless another visa exemption applies.
• Certain travel histories or dual nationalities can make someone ineligible for the VWP. Previous visa or entry refusals, immigration violations and criminal history also require careful assessment and accurate disclosure.
• ESTA eligibility. Some travel histories, some dual nationalities, past refusals and some criminal records rule out ESTA.
• A short visit to Canada, Mexico or an adjacent island does not normally start a new 90-day VWP period. If readmitted under this rule, the traveller receives only the balance of the original admission period.
• Repeat trips. There is no published limit, but long or back-to-back stays prompt questions about whether the engineer is really based outside the U.S.

• Preclearance. Travellers using U.S. Preclearance at Dublin or Shannon undergo U.S. immigration inspection before boarding their U.S.-bound flight. This applies regardless of whether the team is based in Ireland or the UK. Travellers flying directly from a UK airport normally undergo inspection on arrival in the United States.
• Tax and social security for longer or repeat trips are a separate question. Flynn Hodkinson works alongside international tax advisers.

How to prepare engineers for the border

• What each engineer should carry:

1. Employer letter (purpose, U.S. site, dates, duties, confirmation of UK or Irish salary, return date)
2. Extract of the contract clause requiring installation or commissioning
3. Invitation letter from the U.S. customer
4. Proof of employment
5. Return or onward ticket
6. A named site contact
    

• Each engineer should be prepared to describe the trip

Each engineer should understand and explain their own duties truthfully, in their own words. Their answers should be consistent with the actual assignment and supporting documents. Where responsibilities differ, the explanation should reflect those differences. Do not describe installation or commissioning as “meetings” if that is not the actual purpose.

This post is for informational purposes only and is not intended as legal advice. If you require further assistance or advice relating to the above, please contact janice@flynnhodkinson.com.