Jair Domínguez

Injection Mold Shop Supervisor with 12+ years of experience in precision machining and 9+ years specializing in injection molding, injection mold manufacturing, mold maintenance, mold repair, troubleshooting, and tooling within the plastics manufacturing industry. Experienced in leading technical teams, managing preventive and corrective maintenance, manufacturing precision mold components, and supporting high-volume production operations. Proven track record of reducing mold changeover time from 4 hours to 1.5 hours using SMED principles and reducing mold changeover and corrective maintenance downtime from 3% to 1%.

Skilled in conventional machining, basic CNC programming and operation, mold assembly and disassembly, precision measurement, root cause analysis, continuous improvement, and production support. Experienced with multicavity injection molds, mold trials, mold validation, tooling projects, and thermoplastics including PET, PP, HDPE, LDPE, ABS, and TPE.

INJECTION MOLD SHOP SUPERVISOR - TOROSQUI S.A. de C.V. - Mexico

(2019-01)

• Lead daily injection mold shop operations, coordinating preventive and corrective maintenance, mold repair, troubleshooting, and production support activities.
• Supervise and coordinate a technical team of up to 15 technicians, assigning priorities according to production requirements and maintenance schedules.
• Perform injection mold troubleshooting and root cause analysis to identify recurring failures and prevent production downtime.
• Manage preventive maintenance programs for injection molds, maintaining 100% compliance with scheduled maintenance activities.
• Coordinate mold assembly, disassembly, repair, adjustment, and preparation for production.
• Support mold changeovers and implement SMED principles, reducing changeover time from 4 hours to 1.5 hours.
• Manufacture and repair precision mold components to restore tooling functionality and dimensional accuracy.
• Support production and engineering teams with technical troubleshooting, mold performance improvements, and corrective actions.
• Implement TPM practices and ISO 9001 procedures to improve equipment reliability, maintenance control, and operational standards.
• Coordinate international tooling projects with suppliers in China, including technical communication, mold trials, mold validation, troubleshooting, and project follow-up.
• Monitor workshop resources, maintenance priorities, critical spare parts, and operating costs, maintaining approximately 95% budget compliance.
• Develop training programs for technicians covering safety, 5S, metrology, conventional machining, SolidWorks mold design, hot runner systems, electrical systems, preventive maintenance, and corrective maintenance.
• Promote safe working practices and maintain a strong safety record, achieving 0 recordable accidents over 7 years of workshop leadership.

TOOLMAKER - OISA Consultores - Mexico

(2019-01 - 2019-06)

• Interpreted mechanical drawings, technical specifications, and dimensional requirements for precision tooling components.
• Machined precision components using conventional lathes and milling machines.
• Performed precision measurements using micrometers, vernier calipers, and comparators.
• Conducted dimensional inspections to verify components against engineering drawings and specifications.
• Performed machining adjustments and finishing operations to achieve required tolerances.

MACHINIST - TOROSEN S.A. de C.V. - Mexico

(2015-01 - 2019-12)

• Manufactured precision components for injection molds, including ejector pins, guide bushings, cores, and other mold components.
• Machined tool steels including P20, H13, and 4140, as well as non-ferrous metals.
• Operated conventional lathe, milling, grinding, and drilling machines.
• Performed precision machining and dimensional inspections using high-precision measuring instruments.
• Supported mold repair, component replacement, dimensional corrections, and tooling adjustments.
• Ensured dimensional accuracy and proper fit of manufactured mold components.

MACHINIST - QUELTRO - Mexico

(2014-01 - 2015-12)

• Manufactured components for dies and injection molds using conventional lathe, milling, and grinding machines.
• Interpreted mechanical drawings and machining specifications.
• Performed precision machining, fitting, finishing, and dimensional adjustments.
• Conducted fine adjustments and assembly of die and mold components.
• Verified component dimensions using precision measurement instruments.

Bachelor of Science - Mechatronics Engineering - UNITEC (2027-12)

Technical Degree - Machine Tools - CECATI #3 (2014-01)

High School Diploma - Preparatoria Abierta (2024-01)