Mark Del Rosario

Speed up aging of the product and analyze its performance.

• Test Engineers and Design Team Sit down to identify points of Failure.
• Run reliability test to define pass/fail criteria.
• Run hands on test to make test run.
• Analyze the performance, report findings, and establish concerns with the Design Team.
• Design Team takes the feedback given by our team and a new design revision is created.

Reliability tests consist of -

• High Temperature & Humidity Endurance
• Thermal Cycling Endurance
• Powered Thermal Cycling Endurance
• High Temperature Operating Endurance Ingress Protection (Dust Size & Water Pressure)
• Vibrational Endurance
• Air to Air Thermal Shock
• Transient Thermal Impedence
• Shock & Drop
• Dynamic Powered

Other Responsibilities -

• Building Fixtures
• Soldering Components
• Creating harnesses/Electrical Cabling
• Constructing server racks
• Inspecting tested components
• Bringing up test equipment
• Debugging test setup failures
• Thermocoupling components
• Loading and unloading units
• Designing fixtures
• Constructing junction boxes
• Cutting 80/20
• PCBA Inspections
• PCBA Testing
• High Voltage Testing HV-DC, LV-DC, HV-AC
• Modifying Scripts for running test
• Setting up various Power Supplies to run test.

• Building fleets of autonomous drones for prototype testing, EOL testing and validation.
• Balancing various propellers for in-flight testing, EOL testing.
• Soldering various avionics components including flight computes, PCBs, connectors, resistors, LEDs, USBs, breakout broads with precision and reliability.
• Strong understanding of key electronics principles (voltage, current, resistance, charge, conductivity, AC vs DC, etc.)
• Experience using various precision hand tools, torque drivers and lab instruments (multimeter, power supply, etc.) for debug and functionality checks.
• EOL testing for various early stage prototyping.
• QA Checks for all electrical components including avionics boards, sensors, cameras, acoustic probes, air sensors and flight computers.
• Consistently met high-quality standards for all completed work while adhering to established timelines, ensuring client satisfaction with final results.
• Completed engineering and HIL engineering projects and tasks within established timelines and budgets.
• Contributed to a safer working environment through strict adherence to safety protocols, guidelines, and regulations.
• Reviewed MPI technical drawings developed by CAD technicians and drafters.
• Collaborated closely with engineers in developing new products or improving existing ones, providing valuable input from a technician''s perspective.
• Mitigated potential project risks by proactively identifying and addressing areas of concern before they developed into significant issues during our quality assurance meetings.
• Showcased strong attention to detail in the preparation, assembly, and installation of cutting-edge intricate avionics components supporting engineering and HIL engineering projects.
• Assisted in training new team members on company procedures, policies, and technical skills necessary for their roles as Engineering Technicians.
• Assisted with installation, calibration and testing of avionics engineering systems including 3D printed fixtures, test fixtures and EOL fixtures.
• Read and interpreted MPI blueprints, technical drawings, schematics, and computer-generated reports.
• Assisted with design and implementation of new engineering processes and procedures to optimize productivity and reduce downtime.
• Played an instrumental role in reducing project costs by effectively managing resources such as materials inventory management for cycle counts and documentation.
• Actively participated in cross-functional teams addressing complex problems requiring multidisciplinary perspectives contributing to successful outcomes.
• Conferred with engineers and designers to investigate and solve failure issues.
• Modified, maintained, or repaired early stage prototypes for avionics systems and electronics equipment to achieve proper functioning.
• Updated avionics hardware and software platforms by implementing automation and efficiency improvements.
• Reviewed existing MPI, JIRA and electrical engineering criteria to identify necessary revisions, deletions or amendments to outdated material.
• Created, aligned, and optimized avionics systems and electrical instrumentation and testing equipment fixtures.

Proficient with Autonomous Vehicle Technology.

• Autonomous vehicle software bring up : C++, Linux, Python, JIRA, Confluence, SQL.
• Experience in writing testable and maintainable software running in production level environments.
• Assisting other Engineers to bring fleet up to date with current software and hardware.
• Complete sophisticated electromechanical functions and activities : Autonomous vehicle troubleshooting, Component and system removal / installation / assembly / Retrofits / Autonomous fleet updates and modifications.
• Perform Autonomous vehicle root cause analysis, tracking algorithms and behaviors of advance technology and repairs.
• Integrating wiring / instrumentation into autonomous vehicles.
• Conduct PCB and wire harness diagnostics, modifications, and assembly.
• Analyze wire schematics. De-pin / Re-pin wires and connectors.
• Performed Electrical Redundancy on autonomous vehicles.
• Working technical knowledge of following systems; 12v, CAN architecture, LIN Bus architecture, Switches, Modules, Ethernet, Cameras, FPGA, Radar and LiDAR, Astyx Radars, Sensor suites and related interconnection's.
• Building / Installing / Branding and Pinging Lidars and Radars and Astyx radars.
• Analyzing and reviewing LiDAR and Radar and Astyx radar data to evaluate LiDAR and Radar and Astyx radars performance.
• Set up engineering equipment and test fixtures; prepare and conduct tests; operate and maintain equipment used for testing, for both engineering and autonomous vehicle use.
• Directly contribute to projects supporting R&D initiatives and pre-release product validation.
• Trained new technicians on standard operating procedures, ensuring consistency across team.
• Assisted in design and implementation of improved safety protocols, reducing workplace accidents.
• Developed comprehensive documentation for equipment maintenance procedures, increasing efficiency among technicians.
• Inspected, evaluated and calibrated electrical and mechanical systems and components.
• Diagnosed and repaired problems with electrical and mechanical systems.
• Suggested specialized fixtures, test equipment and procedures for failure analysis.
• Mentored junior technicians in maintenance, repair and reporting duties.
• Performed complex mechanical alignments and equipment calibration to meet quality standards.
• Applied critical thinking and research to address complex issues.
• Performed troubleshooting and diagnosis on malfunctioning equipment.
• Observed equipment operation to diagnose and troubleshoot reported issues.
• Conducted root cause analyses for recurring technical issues, resulting in long-term solutions that minimized future disruptions.
• Optimized system performance through thorough testing, analysis, and adjustments as needed.

• Brake jobs
• Air Dryer service
• Oil Changes
• 1k, 8k, 16k, 24k Inspections
• PM and Inspections
• Troubleshooting and diagnostics
• Maintenance
• Heavy Duty, Running Repair
• Engine component overhaul
• Removal, Replacement and adjustment of exterior and interior bodies
• Replacing Windows
• Restoring body surfaces and straightening,
• Replacing Bumpers, Fenders, Body panels.
• All of this was performed on 30ft, 40ft, 60ft Transit buses and Non revenue vehicles (City and county of San Francisco vehicles)
• Improved vehicle performance by conducting thorough diagnostic tests and repairing or replacing faulty components.
• Troubleshot and diagnosed faults with vehicle systems and components using OEM-specific code readers, diagnostic trees, and online knowledge bases.