Marcus Hollenbeck
Mechanical Engineer, Thermal Systems and Rotating Equipment
Cincinnati, OHmarcus.hollenbeck@example.com(513) 555-0132Summary
Mechanical engineer with seven years designing heat exchangers, pump housings and the test fixtures that qualify them. Took a brazed aluminum heat exchanger from concept through production release, trimming unit material cost by 14 percent while meeting a tighter pressure-drop target. Works in SolidWorks and ANSYS daily, holds GD&T drawings to ASME Y14.5, and is comfortable arguing a tolerance with a supplier or a test result with a customer.
Experience
Mechanical Engineer II, Brixham Thermal Systems
– Present
Cincinnati, OH
- Own the mechanical design of a family of brazed aluminum heat exchangers for commercial refrigeration, from concept sketches through production drawings and first-article inspection.
- Redesigned the fin stack and header geometry after CFD and bench tests, cutting unit material cost 14 percent and meeting a pressure-drop spec the previous design missed.
- Built a thermal-cycling test rig with the lab technician that reproduced a field crack in nine days instead of a six-week field trial, and used it to prove the fix.
- Run weekly design reviews with two suppliers in Mexico and Ohio, resolving tolerance stack-ups before tooling instead of after the first bad lot.
Mechanical Engineer, Fenwood Pump Works
–
Dayton, OH
- Designed cast-iron and stainless pump housings for water and wastewater duty, releasing eleven new part numbers with complete GD&T drawings and bills of material.
- Traced a recurring shaft seal leak to a housing bore runout problem using FEA and inspection data; the corrected bore callout ended the warranty claims on that model.
- Reduced the weight of a bracket assembly by 22 percent through topology work in ANSYS while holding the vibration margin the customer required.
- Wrote the DFM checklist the design group now applies to every casting before it is quoted.
Education
Bachelor of Science in Mechanical Engineering
Kettleridge State University, Columbus, OH
Senior design project: a variable-flow coolant loop for a machine tool spindle
Skills
- SolidWorks and Creo
- ANSYS Mechanical and Fluent
- GD&T (ASME Y14.5)
- Tolerance stack-up analysis
- Design for manufacturing and assembly
- Heat transfer and fluid design
- Castings, brazing and sheet metal
- Test rig design and validation
- Root cause analysis (8D, fishbone)
- Bills of material and PLM (Windchill)
- Supplier design reviews
- MATLAB and Python for analysis
Certifications
- Engineer in Training (EIT), Ohio State Board of Registration for Professional Engineers and Surveyors,
- Certified SolidWorks Professional (CSWP), Dassault Systèmes,