ASME Welder

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 Company Description 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