Construction Senior Millwright

Iris Energy; Sweetwater (TX); On-site; USD 80,000 - 110,000; Full time

Benefits offered by this job

Per Diem

Night shift premium

Health insurance

Job summary

IREN is seeking a Senior Millwright to plan, coordinate, and supervise millwright activities for installation, alignment, and startup of chiller plant systems in a critical data center setting.

You will lead field crews, coordinate with subcontractors, ensure safety, and uphold design specs while driving on-time project delivery and quality assurance in a demanding, data-center environment.

Qualifications

• Minimum 8 years in millwright or mechanical installation, with at least 3 years in a supervisory role.
• Demonstrated experience leading field crews and managing subcontractors on complex construction projects.
• Proven experience with large-scale chiller plants and hydronic systems.
• Strong background in rotating equipment installation and precision alignment.
• OSHA 30 certification required; data center construction experience preferred.

Responsibilities

• Lead and supervise millwright crews, subcontractors, and vendors on-site.
• Act as SME for mechanical equipment installation and precision alignment.
• Plan daily work activities, manpower, and crew assignments.
• Promote and enforce site safety standards and a zero-incident culture.
• Oversee installation of major mechanical systems (chillers, cooling towers, pumps, CDU interfaces).
• Support commissioning activities and documentation updates.

Skills

Leadership

Field supervision

Safety compliance

Rotating equipment

Hydronic systems

Education

Millwright journeyman certification or equivalent trade training

High school diploma or equivalent

Associate’s or bachelor’s degree in mechanical engineering, construction management, or related field (preferred)

Tools

P&IDs interpretation

Equipment installation manuals

Job description

Job Type: Full-Time | Location: Sweetwater, TX | Department: Construction | Reporting to: Associate Director, Construction | Work Location Type: #onsite

IREN is a vertically integrated AI Cloud provider, delivering large-scale data centers and GPU clusters for AI training and inference. IREN's platform is underpinned by its expansive portfolio of grid-connected land and power in renewable-rich regions across North America, Europe and APAC.

The Senior Millwright is responsible for planning, coordinating, and supervising all millwright-related activities associated with the installation, alignment, commissioning, and startup of chiller plant systems supporting a direct-to-chip liquid-cooled data center. This role ensures mechanical systems are installed safely, on schedule, within budget, and in accordance with design specifications, quality standards, and commissioning requirements. The position requires deep expertise in rotating equipment, large-scale hydronic systems, and mission-critical environments.

With 100% renewable energy, we build, own and operate our data centers and take pride in being at the forefront of sustainable solutions for the ever-evolving applications of high-performance compute. We believe that human progress is invaluable, but it should be done in the right way – responsibly, sustainably and having a positive impact on the communities we operate in.

Job requirements

• Millwright journeyman certification or equivalent trade training preferred.
• High school diploma or equivalent required; associate’s or bachelor’s degree in mechanical engineering, construction management, or related field preferred.
• Minimum of 8 years of experience in millwright or mechanical installation, with at least 3 years in a supervisory role.
• Demonstrated experience leading field crews and managing subcontractors on complex construction projects.
• Proven experience with large-scale chiller plants and hydronic systems.
• Strong background in rotating equipment installation and precision alignment (laser alignment preferred).
• Experience on mission-critical projects (e.g., data centers, hospitals, industrial facilities).
• Ability to read and interpret mechanical drawings, P&IDs, and equipment installation manuals.
• OSHA 30 certification required.
• Experience with data center construction, particularly liquid cooling or direct-to-chip systems preferred.
• Familiarity with CDU systems and high-density thermal management preferred.
• Knowledge of commissioning processes (Cx) and TAB (Testing, Adjusting, Balancing) preferred.
• Experience with BIM coordination and clash detection tools preferred.

• Millwright journeyman certification or equivalent trade training preferred.
• High school diploma or equivalent required; associate’s or bachelor’s degree in mechanical engineering, construction management, or related field preferred.
• Minimum of 8 years of experience in millwright or mechanical installation, with at least 3 years in a supervisory role.
• Demonstrated experience leading field crews and managing subcontractors on complex construction projects.
• Proven experience with large-scale chiller plants and hydronic systems.
• Strong background in rotating equipment installation and precision alignment (laser alignment preferred).
• Experience on mission-critical projects (e.g., data centers, hospitals, industrial facilities).
• Ability to read and interpret mechanical drawings, P&IDs, and equipment installation manuals.
• OSHA 30 certification required.
• Experience with data center construction, particularly liquid cooling or direct-to-chip systems preferred.
• Familiarity with CDU systems and high-density thermal management preferred.
• Knowledge of commissioning processes (Cx) and TAB (Testing, Adjusting, Balancing) preferred.
• Experience with BIM coordination and clash detection tools preferred.

Other Important Requirements:

• Pre-employment screening, including background check and substance testing may be required according to company policies.
• Must provide own steel-toed work boots; other PPE will be supplied.
• Must be able to reliably commute to the work site daily or have plans to relocate before starting work.
• Must be comfortable working a rotational schedule, which includes day and night shifts as well as weekend work, based on project needs.
• Employees working night shifts will receive a 15% premium added to their hourly rate only for hours worked during night shifts.

Job responsibilities

Leadership & Supervision

• Lead and supervise millwright crews, subcontractors, and specialty vendors on-site
• Serve as the subject matter expert (SME) for mechanical equipment installation and precision alignment
• Plan and coordinate daily work activities, manpower, and crew assignments
• Promote and enforce site safety standards and a zero-incident culture
• Oversee installation of major mechanical systems, including:
  • Chillers (air-cooled and/or water-cooled)
  • Cooling towers and heat rejection systems
  • Pumps (primary, secondary, and tertiary loops)
  • Heat exchangers, including CDU interfaces
  • Large-bore piping systems and valve assemblies
• Ensure proper rigging, setting, leveling, grouting, and precision alignment of rotating equipment
• Verify tolerances, clearances, and installation procedures meet OEM specifications

Direct-to-Chip Cooling Integration

• Coordinate installation interfaces between chiller plant systems and Coolant Distribution Units (CDUs)
• Ensure proper integration between facility water systems and IT liquid cooling loops
• Support pressure testing, system flushing, and cleanliness requirements for liquid cooling systems
• Collaborate with controls teams on thermal management strategies and system sequencing

Scheduling & Planning

• Develop and maintain installation schedules in coordination with project management
• Identify and mitigate schedule risks, including equipment delivery and site constraints
• Coordinate activities across trades, including pipefitters, electricians, controls, and commissioning teams

Quality Assurance & Commissioning

• Ensure all work complies with project specifications, codes, and QA/QC standards
• Lead mechanical pre-functional checklists (PFCs) and installation verification activities
• Support system startup, testing, balancing (TAB), and commissioning activities
• Identify and resolve installation issues, non-conformances, and punch list items

Safety & Compliance

• Enforce OSHA and site-specific safety requirements
• Conduct toolbox talks, job hazard analyses (JHAs), and safety audits
• Ensure proper use of rigging equipment, lifting plans, and lockout/tagout (LOTO) procedures

Documentation & Reporting

• Maintain daily reports, installation logs, and progress tracking
• Review and interpret construction drawings, P&IDs, and equipment submittals
• Coordinate redlines and support development of as-built documentation

At IREN, we offer a comprehensive, market-competitive total rewards package designed to support employees’ well-being, career advancement, and financial wealth. Our offerings reflect our commitment to Proceed with Purpose while rewarding high performance and long-term growth.

Compensation

• Per Diem amount of $180.00 and project allowance, when applicable
• 15% night-shift premium for eligible roles, when applicable
• Overtime compensation for non-exempt workers for hours worked over 40 per week
• Relocation and Living-out-allowance (as applicable and based on successful candidate circumstances)

Health & Wellness

• 100% company paid health insurance premiums (medical, dental, and vision) for employees, 75% company paid coverage for dependents
• Company-paid short-term and long-term disability insurance
• Voluntary life, critical illness, and accident coverage available
• Health Savings Accounts (HSA) – when combined with the High-Deductible Health Plan
• Employee Assistance Program and wellness resources

Retirement & Financial Wealth

• 401(k) retirement plan with company match
• Paid professional development and access to financial planning and legal services

Time Off &Leave Programs

• Paid Time Off (PTO) and paid holidays

Growth & Development

• Professional development to support certifications, continuing education, or role related training

Community &Culture

• Company events and team-building activities

We value diverse perspectives and believe that skills can be developed. If you’re passionate about this role, we want to hear from you — whether you meet every criteria or not. Your unique experiences might be exactly what we need!

IE US Operations Inc., the employing entity and proud member of the IREN group is an equal opportunity employer that is committed to creating an inclusive workplace. We are committed to evaluating qualified applicants and do not discriminate against protected characteristics under applicable legislation.

IE US Operations, Inc. “IREN”participatesin E-Verify and will provide the federal government with your Form I-9 information to confirm that youare authorized towork in the United States.

By applying for this position and submitting your resume and application materials, you consent to the processing of your personal information in accordance with our Job Applicant Privacy Statement available on our website at www.iren.com.