Diana Ruiz

Commodity buyer - Inj. Molding, Paper and electrical

Thousand Oaks, California, United States

About

Fluent in Spanish and English | Bachelor's degree in Industrial Engineering. Over 12 years of experience in supply chain operations—including planning, inventory control, and supplier management—as well as strategic sourcing and procurement of direct and indirect materials for automotive and manufacturing companies. Skilled in analyzing cost drivers such as commodity indexes, exchange rate fluctuations, and market volatility to support strategic decision-making and cost optimization. Highly experienced with SAP’s Material Management (MM) module, serving as a Key User for process definition, system implementation, and ongoing support. Recognized as a dynamic, methodical, and results-oriented problem solver with strong communication and negotiation skills, effectively collaborating with both foreign and local suppliers.

Experience

  • Commodity buyer - Components at ABC Technologies
    Dec 2020 - Jun 2023 · 2 yrs 7 mos

    - Managed Injection molding, paper and electrical commodities across ABC plants in Canada, US, Mexico, Poland and Spain (Annual Spend: 54MM USD + Directed Buy: 108MM USD). - Led Cost Saving projects with cross-functional teams. - Intervened when supply availability was on risk of affecting customer demand. - Monitored key commodity drivers such Fx and market indexes to identify opportunities or risks on each commodity. - Identified alternative suppliers for high-risk sources and led the transition to ensure stable and reliable supply. - Presented commodity portfolio reviews to senior management. - Achieved annual savings of $269K by directing resin purchases to injection molding suppliers at ABC pricing and implementing component design changes.

  • Buyer - Electrical and Plastics Commodity at Skyjack Inc.
    Apr 2017 - Dec 2020 · 3 yrs 9 mos

    - Responsible for all sourcing and commercial activities for the electrical and plastics commodity for current production (Total Spend: 125 MM CAD). - Managed engineering changes for the electrical and plastics commodity for current production. - Solved material availability issues with current vendors and provide second source when necessary. - Planned and Coordinated effective supply of new components to the production line or engineering department for specific projects. - Monitor supplier performance in terms of quality, delivery and cost savings projects. - Tracked global commodity prices and Fx to identify risk and opportunities on the commodity (copper, lead, nylon pa6, USD, EUR). - Implemented savings in 2019: 754k CAD through switching distributors of off the shelf components, parts standardization, moving manufacturing location of high-volume harnesses to Mexico and exploring new vendors. - Obtained savings in 2018 for 555k CAD through negotiation with current vendors, alternative manufacturers of subcomponents (metal enclosures, relays, electronic components).

  • Pre-Production Planner at Litens Automotive Group
    Jun 2016 - Apr 2017 · 11 mos

    - Coordinated Engineering Change Orders to avoid obsolescence through detailed run-out schedules. - Scheduled production volumes based on new components approval. - Ensured timely supply from foreign and local vendors for components affected by engineering changes. - Updated inventory parameters on ERP system to make sure releases reflected safety stock and lead time for local and foreign suppliers. - Reduced 79k of inventory through analysis and optimization of obsolete material. - Created a process to control and track temporary approvals issued by Engineering.

  • General Motors (6 yrs 2 mos)
    • Direct Material Buyer - Andean Region
      Jun 2014 - Mar 2016 · 1 yr 10 mos

      - Planned, coordinated and led purchases of the Electrical Commodity (harnesses, batteries and radios) for GM Colombia and GM Ecuador while assuring the levels of local content required by the Government. Selected vendors according to price and quality standards (Colombia Annual Purchase Value (APV) 18MM USD – Ecuador APV 14MM USD). - Obtained savings for USD$590K during 2016, USD $370K during 2015, $330K during 2014 by taking into account quality, service, price and technology parameters. - Reduced the price of a radio on 25% by buying directly to the manufacturer. (Total Annual Saving: USD$429K) - Improved the sequencing process by reducing redundant personnel of the wiring supplier in the plant. (Total Annual Saving: USD$147K) - Increased the response time of the Electrical Commodity purchases requested by Engineering in Colombia and Ecuador from 68% to 94%.

    • Indirect material buyer
      Nov 2012 - Jun 2014 · 1 yr 8 mos

      - Selected the most appropriate source for Indirect Material, Machinery and Equipment, Manufacturing and Administrative Services Commodities (APV: USD $5MM). Supported Manufacturing and Maintenance areas in new projects. - Obtained additional revenue by selling recycled material for USD $1MM per year. - Obtained savings for USD $300K during 2013 and USD $325K during 2014. - Recognized for commitment on May 2014.

    • Functional Leader - Material Management SAP
      Jan 2012 - Oct 2012 · 10 mos

      - Designed new business processes and procedures of Material Management (MM) when GM’s Free Trade Zone (ZOFICOL) was created. - Implemented SAP Material Management Module for the Free Trade Zone of GM Colmotores (ZOFICOL). - Trained end users regarding new processes and tools created for the new Company. - Honored in the “Night of Stars” ceremony as one of the best administrative employees of 2012 for the implementation of MM SAP Module for ZOFICOL.