Bram van den Berg
Senior CNC Machinist | 5-Axis Milling & Turning | Precision Manufacturing
Rotterdam
Professional Summary
Senior CNC Machinist with extensive experience in multi-axis milling and turning for critical offshore, maritime, and heavy equipment applications. Demonstrated capability in offline and at-control programming, complex workholding design, and precision inspection to micron-level tolerances.
Work Experience
Maasstad Precision Components B.V.
Rotterdam, Netherlands
Senior CNC Machinist
Mar 2017 – Present
- Program, set up, and operate 5-axis DMG MORI machining centers equipped with Heidenhain TNC 640 and Siemens 840D controls for high-mix, low-volume maritime and offshore components.
- Develop and optimize CNC toolpaths using Mastercam, reducing cycle times by 14% on complex titanium and duplex stainless steel pump housings.
- Inspect first-off articles using coordinate measuring machines (CMM) and manual precision instruments to maintain tolerances within plus/minus 0.008 mm.
- Mentor apprentice machinists on workholding strategies, cutting parameter selection, and safe machine operation under ISO 9001 quality guidelines.
Delfshaven Mechanical Engineering B.V.
Schiedam, Netherlands
CNC Machinist & Programmer
Aug 2011 – Feb 2017
- Operated 3-axis and 4-axis Mazak CNC milling centers and Mazatrol CNC lathes producing industrial valve components.
- Prepared custom clamping fixtures and zero-point workholding setups to minimize part deflection during heavy roughing passes.
- Collaborated with manufacturing engineers to resolve tool-wear challenges in nickel alloys, extending tool life by 20% through revised feeds and speeds.
- Conducted routine machine maintenance, coolant concentration tracking, and spindle alignment checks.
Education
Techniek College Rotterdam
MBO Diploma · Allround Verspaner (Machining Technology, MBO Level 3) · Rotterdam, Netherlands · Passed · Sept 1995 – Jun 1998
Completed dual vocational track combining precision lathe turning, milling, technical blueprint reading, and metallurgy fundamentals.
Key Technical Projects
5-Axis Hydraulic Manifold Optimization
Apr 2023 – Nov 2023
- Transitioned production of deep-sea hydraulic manifold bodies from 3-axis setups to full 5-axis continuous milling, reducing setup steps from four operations to two.
- Validated post-processor output and simulated multi-axis toolpaths in Vericut to eliminate spindle head collision risks.
Skills & Expertise
5-Axis CNC Milling
CNC Turning
Heidenhain TNC 640
Siemens Sinumerik 840D
Mastercam
CMM Inspection
GD&T Interpretation
Fixture Design
Machining Exotic Alloys
Toolpath Optimization
Languages
Dutch
C2
English
C1
German
B1
Certifications
VCA-VOL (Safety for Operational Supervisors)
TÜV Rheinland Nederland · Apr 2018
TNC 640 Advanced 5-Axis Programming Certification
Heidenhain Benelux · Sept 2021