ASME Welder

Job Description

Job Description

Mass Tank – Middleboro, MA

Mass Tank is seeking an experienced ASME Pressure Vessel Welder / Fabricator to join our steel fabrication team in Middleboro, MA. This role is ideal for a highly skilled welder with direct experience fabricating and welding ASME-coded pressure vessels in a shop environment.

The successful candidate will play a critical role in producing high-quality, code-compliant vessels used in industrial and regulated applications. This position requires a strong understanding of ASME Section VIII requirements, welding procedures, and quality expectations typical of certified pressure vessel fabrication shops.

Key Responsibilities

• Fabricate and weld ASME pressure vessels in accordance with approved drawings, WPSs, and job travelers
• Perform welding processes including (but not limited to) GMAW, GTAW, and SMAW on carbon steel and stainless steel
• Read and interpret ASME fabrication drawings , weld symbols, and specifications
• Follow qualified Welding Procedure Specifications (WPS) and maintain compliance with ASME Section IX requirements
• Fit-up shells, heads, nozzles, and attachments to ASME tolerances
• Work closely with Quality Control to support inspections, NDE, and code documentation
• Maintain a clean, safe, and organized work area in accordance with shop safety standards
• Participate in continuous improvement of fabrication and welding processes

Required Qualifications

• Direct experience fabricating and welding ASME pressure vessels (required)
• Proven experience working in an ASME-certified fabrication shop
• Ability to pass or maintain ASME welding qualifications
• Strong understanding of:
• • ASME Section VIII (Div. 1 preferred)
  • Welding symbols and fabrication drawings
  • Fit-up and dimensional tolerances for pressure vessels
• High attention to detail and quality-focused mindset
• Strong work ethic, reliability, and ability to work as part of a fabrication team
• Commitment to safety and compliance in a regulated manufacturing environment

Mass Tank is one of New England's premier tank companies, specializing in the fabrication of custom steel tanks for a wide range of industries and applications — from flammable and combustible storage to chemical containment to food-grade processing. We also supply polyethylene and fiberglass tanks, tank accessories, and a full suite of field services.
Our inspection division, Mass Tank Inspection Services (MTIS), delivers aboveground and underground storage tank inspection, testing, and repair services to federal, military, and private-sector facilities nationwide. Our team holds certifications including API 653, API 510, API 570, STI SP001, NACE, and NDT qualifications — and performs work at sites ranging from VA Medical Centers and military installations to industrial plants and municipal water systems. This role supports that team directly.
We're a family-owned company with a 100-year legacy, a team-oriented culture, and a business that's actively scaling. If that sounds like a fit, we'd like to hear from you

Mass Tank is one of New England's premier tank companies, specializing in the fabrication of custom steel tanks for a wide range of industries and applications — from flammable and combustible storage to chemical containment to food-grade processing. We also supply polyethylene and fiberglass tanks, tank accessories, and a full suite of field services. Our inspection division, Mass Tank Inspection Services (MTIS), delivers aboveground and underground storage tank inspection, testing, and repair services to federal, military, and private-sector facilities nationwide. Our team holds certifications including API 653, API 510, API 570, STI SP001, NACE, and NDT qualifications — and performs work at sites ranging from VA Medical Centers and military installations to industrial plants and municipal water systems. This role supports that team directly. We're a family-owned company with a 100-year legacy, a team-oriented culture, and a business that's actively scaling. If that sounds like a fit, we'd like to hear from you