Sigma Engineering Works, part of Mazrui Energy Services is looking for a skilled HBM Operator to play a pivotal role at the Machine shop.

Sigma Engineering Works is an engineering service company, offering fabrication, manufacturing, service & repair, and other services to the energy industry. At Sigma Engineering Works, we are passionately committed to the environment, our community, our employees and our shareholders. We maintain the highest standards in quality, integrity and ac-countability to be a credible partner across the industry.

Key Responsibilities and Duties :

• 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

Minimum Required skills, knowledge and experience for the role:

• Recognized Diploma from a Higher Technical College
• Minimum of five years practical experience of workshop practices
• Experience of Oil & Gas Industry
• Ability to operate HBM Machines.
• Ability to read Engineering drawings
• Ability to select right cutting tools, cutting parameter.

If this sounds like you, please apply to this job with your updated CV.