HBM Operator(Machinist - Oil and Gas Industry) Sigma Engineering Works LLC

Set up, program at operator level, and operate CNC Horizontal Boring Machines for large, heavy-duty oil & gas components

Machine critical parts such as valve bodies, wellhead components, flanges, manifolds, spools, and pressure-containing equipment

Read and interpret engineering drawings, GD&T, API specifications, and customer requirements

Align, level, and secure large workpieces using precision fixtures, clamps, and alignment tools

Select, install, and set cutting tools, boring bars, and tool offsets suitable for alloy steels, stainless steels, Inconel, and other oil & gas materials

Edit CNC programs at the machine (tool offsets, wear offsets, minor code changes)

Perform boring, drilling, facing, milling, tapping, and contouring operations with tight tolerances

Establish and verify work coordinates, datums, and reference points

Monitor machining processes to ensure dimensional accuracy, surface finish, and repeatability

Inspect parts using precision measuring instruments (micrometers, bore gauges, dial indicators, CMM where required)

Maintain compliance with API, ASME, and customer quality standards

Identify and troubleshoot machining, tooling, or program-related issues affecting part quality

Perform routine machine maintenance, calibration checks, and housekeeping

Complete required production and quality documentation, including inspection reports and job travelers

Follow strict safety procedures for handling large components and heavy lifting equipment

Work closely with programmers, engineers, quality, and inspection teams to meet delivery schedules.