IUOE Local 351

What IUOE Local 351 does

IUOE Local 351 is a labor union chartered in 1941 under the International Union of Operating Engineers (IUOE), representing approximately 3,700 operating engineers across six U.S. states — Arkansas, Kansas, New Mexico, Missouri, Oklahoma, and Texas. The union organizes heavy equipment operators, mechanics, and related craft workers in oil and gas, refining, construction, pipeline, and adjacent industrial sectors, negotiating wages, benefits, and working conditions through 51 collective bargaining agreements (CBAs). It is affiliated with the international IUOE, which represents approximately 400,000 members nationally.

The union operates a multi-office footprint across its jurisdiction, with staffed offices in Borger (TX), El Paso (TX), Ardmore (OK), and Artesia (NM) — locations that align with major refining, petrochemical, and pipeline corridors. Its business model is membership-dues-based: monthly per-member dues fund collective bargaining representation, apprenticeship and training administration, member benefits, and organizing capacity. The international IUOE affiliation provides national bargaining leverage, standardized training infrastructure, jurisdictional coordination across locals, and legislative/political resources that supplement the local's own operations.

Local 351 maintains a partnership with the Williams Hart law firm, which provides labor-side legal counsel for collective bargaining negotiations, grievance arbitration, and unfair labor practice proceedings. The local pursues membership growth through traditional organizing campaigns and NLRB-supervised representation elections, using the statutory election process to organize un-represented operating engineers within its six-state territory and expand the CBA-covered workforce.

Name

IUOE Local 351

Legal name

IUOE Local 351

Website

https://local351.com

Company type

Private

Founded year

1941

Operating status

Operating

Headcount range

1–10 employees

Short description

IUOE Local 351 is a labor union representing approximately 3,700 operating engineers across six U.S. states. It negotiates 51 collective bargaining agreements covering heavy equipment operators in oil and gas, refining, pipeline, and construction industries under the international IUOE.

Ownership category

akta.pro rank

Product category

Labor Union Services

NAICS

Heavy and Civil Engineering Construction (237), Other Specialty Trade Contractors (2389)

SIC

Oil & Gas Field Services, Nec (1389), Construction - Special Trade Contractors (1700)

akta.pro industry

PRIMARYEUAEAGAG

Refinery & Petrochemical O&M / Maintenance Outsourcing

Energy, Utilities & Environment/Energy Infrastructure & Services (EPC, O&M, Field Services)/Operations & Maintenance (O&M) Services for Energy Assets

SECONDARYEUAJAAAC

Workforce, Safety & Training (Gas Utility Operations)

Energy, Utilities & Environment/Gas Utilities (Distribution)/Local Distribution Company (LDC) Operations

Keywords

• Labor union representation
• Collective bargaining services
• Union membership services
• Heavy equipment operators
• Construction trade union

Headquarters

HQ city

Borger, Texas

HQ country

United States

HQ region

North America

Offices4 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Others

Revenue model

1. Union Dues: Union dues collected from members to fund salaries for Officers and Staff, administration and representation expenses, negotiating Collective Bargaining Agreements, and arbitrating grievances. No dues are collected until after a first Collective Bargaining Agreement is voted and approved.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

IUOE Local 351 represents approximately 3,700 operating engineers across six U.S. states (Arkansas, Kansas, New Mexico, Missouri, Oklahoma, and Texas) under 51 Collective Bargaining Agreements. It negotiates and enforces labor contracts and provides collective bargaining, grievance resolution, workplace representation, and union steward training primarily for workers in the oil & gas, construction, and government contracting sectors.

Product overview

IUOE Local 351 is a labor union representing approximately 3,700 members across Arkansas, Kansas, New Mexico, Missouri, Oklahoma, and Texas under 51 Collective Bargaining Agreements. The organization offers union membership services including member registration and login portal, collective bargaining representation, workplace disciplinary proceedings, grievance resolution, labor movement promotion, and continuing education and training for Union Stewards. The union utilizes the law firm Williams Hart for labor and employment legal representation. The organization operates offices in Borger, Texas (main office), El Paso, Texas, Ardmore, Oklahoma, and Artesia, New Mexico. As a service-based organization rather than a technology product company, IUOE Local 351 does not offer discrete software products or modules in the traditional sense.

Differentiator

Problem solved

Functional benefit

Products and services

• Collective Bargaining Representation Negotiation and administration of labor contracts on behalf of approximately 3,700 members with signatory employers across Arkansas, Kansas, New Mexico, Missouri, Oklahoma, and Texas; the local currently maintains 51 Collective Bargaining Agreements covering oil & gas, construction, and government contracting employers.
• Grievance Resolution and Arbitration Services Formal representation of individual members in workplace grievances, disciplinary actions, and arbitration proceedings under the local's CBAs, supported by the Business Manager's attorney licensure in Texas and New Mexico.
• Workplace Representation and Member Advocacy Day-to-day support to members and union stewards in dealings with employers on working conditions, job-site issues, and contract enforcement, delivered through staffed offices in Borger TX, El Paso TX, Ardmore OK, and Artesia NM.
• Union Steward Training Instructor-led training classes for elected union stewards on contract interpretation, grievance handling, and member representation, delivered by experienced local instructors and supporting the local's steward network across the six-state jurisdiction.

Named customers15 records

Segments5 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Seven partnerships are on record, tiered flagship, core and minor.

• International Union of Operating Engineers (IUOE)flagshipStrategic or Co-development PartnerParent organization. Local 351 is an autonomous affiliate of IUOE which has total membership of approximately 400,000. IUOE provides support, resources, and collective strength to Local 351.
• Williams Hart Law FirmcoreImplementation/ SI/ Consulting PartnerLocal 351 utilizes expert attorneys at Williams Hart in Houston, Texas for labor and employment law matters, representing members when labor issues arise.
• National Labor Relations Board (NLRB)coreStrategic or Co-development PartnerNLRB conducts union elections and determines showing of interest (30% minimum) for union representation. Local 351 uses NLRB processes for organizing workers.
• AFL-CIOminorStrategic or Co-development PartnerLabor federation providing resources and support to affiliated unions like IUOE Local 351.
• Union PlusminorGTM or Marketing PartnerProvides benefits and discounts to union members through the AFL-CIO affiliation.
• Construction and General Workers Federation (CPF)minorStrategic or Co-development PartnerFederation providing support and resources to affiliated union organizations.
• Union SportsmenminorGTM or Marketing PartnerOrganization providing recreational and advocacy opportunities for union members.

Scale indicators5 records

Expansion highlights4 records

Others

• National Labor Relations Board (NLRB): Federal agency that administers union elections and the card-check showing-of-interest process Local 351 uses to organize new groups. Comparable as the institutional counterparty and process regulator that determines Local 351's ability to add new members and sign new CBAs.

Broad incumbents

• AFL-CIO: National labor federation that affiliates IUOE and Local 351 indirectly via the parent IUOE. Comparable as the umbrella federation providing political, organizing, and benefit-program (Union Plus) support to Local 351's members across its six-state footprint.
• International Union of Operating Engineers (IUOE): Parent organization of Local 351 and the broader IUOE federation. Directly comparable as the umbrella body providing collective bargaining, training, and political resources to IUOE's approximately 400,000 operating engineer members, of which Local 351's 3,700 are a subset.
• Laborers' International Union of North America (LIUNA): Large national union representing construction laborers and related trades at refineries, pipelines, and government projects. Comparable to Local 351 as a parallel trade union with overlapping employer relationships and a similar dues-funded, CBA-driven business model.

Direct peers

• United Association of Plumbers, Pipefitters, and Service Techs (UA): Represents pipefitters, plumbers, HVAC service techs, and instrumentation workers—trades explicitly listed in Local 351's membership. Comparable because UA competes and cooperates with IUOE locals to staff refinery maintenance and turnaround work in overlapping geographies.
• United Steelworkers (USW): National union representing tens of thousands of oil refinery, petrochemical, and pipeline workers across the U.S. Directly comparable because USW negotiates CBAs at overlapping refinery employers (including several in the Texas and Oklahoma corridor) for craft roles similar to those Local 351 represents.
• IUOE Local 18 (Colorado/Wyoming): Sister IUOE local representing heavy equipment operators, mechanics, and stationary engineers across Colorado and Wyoming. Comparable to Local 351 as a peer IUOE affiliate with the same charter structure, dues-funded operating model, and refinery/energy/pipeline employer footprint.
• International Brotherhood of Electrical Workers (IBEW): Represents electricians, instrumentation techs, and maintenance workers at refineries, petrochemical plants, and government facilities. Comparable to Local 351 because IBEW locals negotiate CBAs for construction and maintenance crafts Local 351 also organizes, often at the same employer sites.
• International Brotherhood of Boilermakers: Represents boilermakers, pipefitters, and related construction and maintenance workers at refineries, power plants, and petrochemical facilities. Comparable to Local 351 because it organizes the same refinery O&M and turnaround craft labor pool that Local 351 supplies in Texas, Oklahoma, and New Mexico.
• IUOE Local 66 (Houston, Texas): Large IUOE local covering the Houston/Gulf Coast refining and petrochemical complex. Comparable to Local 351 because both are IUOE operating engineer locals in Texas with overlapping refinery employer bases, similar CBA structures, and shared organizing methodologies through the IUOE parent.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/iuoe-local-351

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

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M&A

Investments

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Frequently asked questions about IUOE Local 351