How does hiring through the union hall work for contractors?

Start with the institution behind the hall.

The United Association is a union representing the pipe and mechanical trades: it represents approximately 409,000 plumbers, pipefitters, sprinkler fitters, HVACR service technicians, welders and pipeliners across North America, and its listed trades also include steamfitters and the metal trades.

Those members belong to UA local unions, and it is with those locals — or with agreements signed at the national level — that a signatory contractor's relationship sits.

The relationship runs on agreements, not open postings.

"Signatory" is the UA's National Pension Fund glossary's word for an employer bound by a UA collective bargaining agreement — the fund defines reciprocity for members who work for "employers that are signatory to United Association collective bargaining agreements in areas outside the jurisdiction of their home Local Union."

Those agreements exist at both levels: the Mechanical Contractors Association of America partners with the UA, and its MSCA department signs the UA National Service and Maintenance Agreement, in effect August 1, 2021 through July 31, 2027, while its PCA subsidiary represents union plumbing contractors.

Signatory status is a package, and it reaches past pay — a contractor that later withdraws from a multiemployer pension plan, completely or partially, can owe the plan withdrawal liability under ERISA (29 U.S.C.

1381).

That broader signatory-contractor package is its own subject; this page sticks to the hiring mechanics.

What we cannot hand you is the list procedure itself.

How a local orders its out-of-work list, whether requests are filled in rotation or by other rules, and how dues, initiation and local jurisdiction lines are drawn — none of that was verified in our research, and it varies by local.

The local, and its agreement wherever it is written down, is the source that counts — so ask before you staff a job around an assumption.

The shortlist of questions is below.

Apprenticeship is the part with a public map.

BLS points apprenticeship seekers to the state employment service, the state apprenticeship agency, local contractors and local union-management apprenticeship committees, plus apprenticeship.gov.

If you are hiring rather than seeking, that same list is a sensible place to start — the committee for your trade is the one to call.

The committees on that list are apprenticeship bodies, and the trade's registered programs are on the public record: UA apprenticeships are registered with the U.S. Department of Labor and typically last five years, with 2,000 hours of paid on-the-job training per year plus 216 hours of related classroom instruction.

Call the committee about apprentice classes and what taking apprentices onto your crews requires of your company.

Whether you can request a named journeyman instead of taking whoever the hall refers is a local rule, and our research did not verify how any local handles name requests — the mechanics vary by local.

So ask two questions before you plan a crew around a name: whether the agreement permits a contractor to request a specific worker, and what making the request does to that worker's standing on the list.

Keep the training side separate from the staffing side while you ask.

The union-management committees BLS points apprenticeship seekers to are apprenticeship bodies — your journeyman staffing questions belong to the agreement and the referral process, not to the apprenticeship offices, so the desk you ask matters.

And if you are not signatory — or the local's answer leaves you short — the merit-shop channels do not run through a hall.

Merit-shop apprentices come through ABC's 67 chapters, which give access to more than 450 registered programs, and through PHCC state chapters' registered programs, and SkillBridge lets employers become training providers and host service members in their last 180 days of service.

For the full channel picture — chapters, trade schools, supply houses, referrals, lawful direct approaches — see our guide to how to find plumbers to hire, and browse the plumber jobs page to see how a posting reads to candidates who are looking.

A member who works outside their home local's jurisdiction is commonly called a traveler in the pipe trades — our research did not verify how any local defines the term, so read it as shorthand rather than a definition.

The verified piece is the pension one, and it is the one that matters to you as the employer: the UA's National Pension Fund defines reciprocity that allows employees to maintain their vested pension benefits and continue to earn additional benefits when they work for employers signatory to United Association collective bargaining agreements in areas outside their home local's jurisdiction.

The rest of the travel mechanics vary by local and were not verified in our research — how travel cards work, whether a member clears through your local first, and what travel allowances the agreement owes are all local terms, just like dues and initiation.

On travel allowances specifically, our research found no verified typical per diem for traveling pipe-trade workers.

What the GSA publishes is federal per diem — what federal agencies pay their own travelers; private employers use those figures as a benchmark, not a rate you owe.

When you do hire — hall-referred or not — the rest of the process is the same employer's job: screening, pay plans, onboarding.

Our guide to hiring HVAC and plumbing techs covers those steps.

This page is employer career and business information, not legal advice. Referral, name-request and travel rules vary by local — confirm them with the local before you rely on them — and benefit-plan questions, including withdrawal liability under ERISA, are worth taking to the plan and an employment attorney before you sign or withdraw.