Sunay Yaşar

Materials Science | Supplier Quality Engineer

Istanbul, Türkiye

About

I'm a materials science engineer in love with learning about materials. I work in the automotive industry as a supplier quality engineer. I'm a STEM writer. And most importantly, this summary isn't written by ChatGPT. If you keep reading this, I assume you want to learn more about me, so I will give you a blatant summary of my background. I studied Materials Science and Engineering at Yıldız Technical University, a renowned Turkish University. My thesis subject was "Antifouling Nanocomposite Polymer Coatings". I'm also finishing my Economics degree at Anadolu University, which is an Open University program. I speak Turkish (obviously), English, and a little bit of German. I started my career as a long-term term MT intern as a quality intern at Borusan Mannesmann. As a quality intern, I executed Lean Six Sigma projects. I took part in the in-line quality and routine quality control processes. After that, I did my rotation in the Environment and Management Systems department as a Sustainability Specialist. By doing so, I became the first employee at Borusan Holding to receive the title of sustainability employee. As I sought more technical involvement and returned to quality engineering. I started working in Ford Otosan as a Supplier Quality Engineer/Program STA in the New Ford Transit project-V710. There, I learned many things. PPAP process, stages of launching a new vehicle, problem-solving methods (8D, etc.), and most importantly detecting a root cause and the solution in design and process aspects. Now I work at Mercedes Benz Türk A.Ş. as a Supplier Quality Engineer. Mainly, I'm responsible for reclamation management through the SAP-QM system and ensuring general coordination in quality improvement activities to be carried out at the factory site and with suppliers. I'm interested in root cause investigations since they make me feel like Sherlock Holmes of the production and design. I love materials science and writing about science and engineering. I do also love continuous improvement. To learn more about me you can ask my friends. They will say that I'm the most positive yet passionate person they know (at least I will). However, if you still want to learn more about me, just DM me or send an e-mail to [email protected].

Experience

  • Supplier Quality Engineer at Mercedes-Benz Türk A.Ş.
    Sep 2023 - Present · 2 yrs 11 mos

    Managed the reclamation process for nonconforming parts with an annual cost impact of approximately €3.7 million, utilizing the SAP-QM system; led ICA/PCA follow-ups through 8D reports. Improved supplier performance in serial production through structured supplier development initiatives, applying Lean manufacturing, continuous improvement, and Six Sigma methodologies. Developed advanced KPI monitoring systems, including the creation of a new Power BI dashboard and automated weekly/monthly performance reports using Excel and VBA. Coordinated supplier support activities at both the factory and customer sites, ensuring effective issue resolution and performance alignment. Conducted supplier audits and visits to evaluate and improve compliance with VDA 6.3 and ISO 9001 standards to ensure long-term quality assurance and risk mitigation. Acted as a cross-functional liaison between purchasing, logistics, and production teams to support end-to-end supply quality and flawless vehicle delivery.

  • Supplier Development Engineer (Program STA) at Supplier Development Engineer (Program STA)
    Apr 2022 - Sep 2023 · 1 yr 6 mos

    Managed supplier quality and readiness activities for key interior and electrical components during the development and launch phases of the New Ford Transit (V710) and J74 projects. Monitored and escalated critical supplier-related issues impacting PPAP delivery. Conducted containment, root cause analysis (ICA/PCA), and follow-up through 8D reports and AIMS system to ensure resolution of project. Represented supplier quality in cross-functional meetings and coordinated with engineering, purchasing, and production teams to mitigate risk. Supported audit processes including FCPA (Consumer Product Audit), VOCF (Voice of Customer Fleet), Craftsmanship, Campaign Prevention, and Hard Rocks reviews. Lead supplier nomination through GPDS and the Supplier Champion process with upper management. Collaborated with product development, purchasing, and STA teams for alignment. Provided training and guidance to suppliers and internal teams on APQP/PPAP processes and readiness assessment to ensure compliance and launch stability.

  • Sustainability & Quality& Management Systems at Borusan Mannesmann
    Dec 2020 - Feb 2022 · 1 yr 3 mos

    Started as a Management Trainee at Borusan Mannesmann, a leading steel pipe manufacturer for the automotive industry. Led Lean Six Sigma (DMAIC/Kaizen) projects to improve plant quality metrics. Developed a DMAIC project to optimize detection of cold welding continuity defects. Supported online quality control, 8D reporting, and inspection procedures. Led IATF 16949 certification processes, ensuring compliance with automotive quality standards. Later appointed as the first certified Sustainability Employee across Borusan Holding. Managed sustainability certifications and standards including ISO 14064, EPD, and LCA processes. Executed sustainability reporting (GRI, CDP) and coordinated waste management compliance across 5 sites. Collaborated with agile teams to deliver awareness campaigns and company-wide sustainability initiatives.

  • Summer Intern at Anadolu Dokum Sanayi
    Jul 2019 - Aug 2019 · 2 mos

    Production internship at Anadolu Dokum, a Turkish casting company specializing in the production of arc furnace and centrifugal steel products.