Xinzhu Gu
Biography
Xinzhu Gu
Education
B.S. | Biomedical Engineering, China Pharmaceutical University | 2007
Ph.D | Chemical Engineering, Syracuse University, Advisor: Patrick T. Mather | 2012
Postdoctoral Research Associate | University of Pittsburgh, Advisor: William R. Wagner | 2013-2017
Industrial Experience
2017 – present: PPG Industries
Overview
How would you describe your typical workday?
As Global S&T Portfolio Manager at PPG, I work at the intersection of technology, strategy, and business growth. My day-to-day responsibilities focus on managing and continuously improving PPG’s innovation portfolio and new product introduction processes to accelerate organic growth. I work closely with our S&T leadership, corporate strategy leadership, global portfolio managers, and cross-functional teams around the world to ensure that innovation projects are aligned with business priorities and customer needs.
Drawing on my background in materials science, coatings innovation, and technology development, I help evaluate opportunities, prioritize investments, monitor portfolio performance, and support data-driven decision-making across our global R&D organization. A key part of my role is connecting scientists, business leaders, and strategy teams to help promising technologies successfully progress from concept to commercialization and ultimately deliver value for PPG and our customers.
How do you use rheology in your day-to day work?
Although my current role is focused more on portfolio management and innovation strategy than hands-on laboratory work, rheology has been an important part of my career. Rheology helps connect material structure to real-world performance by providing insight into how materials flow and deform during manufacturing, storage, application, curing, and end use. Rheological measurements have helped us understand and optimize important coating properties such as storage stability, sprayability, pumpability, sag resistance, leveling, appearance, and defect formation. By evaluating material behavior across different shear rates, we can better predict how a coating will perform throughout its lifecycle. Rheology is also a powerful predictive tool that helps link formulation design and curing behavior to final properties such as appearance, hardness, and durability.
What inspired you to become a scientist and/or pursue a career in your specific field?
I feel very fortunate to have been raised by two engineers who fostered a love of math, science, and problem-solving from an early age. They encouraged my curiosity and helped me develop a habit of asking not just what happens, but why it happens. Looking back, I have always been fascinated by understanding how things work and getting to the root cause of problems.
When it came time to choose a field of study, science and engineering felt like a natural fit. I was particularly drawn to materials because they are at the heart of so many technologies and everyday products. By understanding the relationships between structure, properties, and performance, we can solve real-world challenges and create innovative solutions. That passion ultimately led me to study chemical engineering and polymers, and later to a career in coatings, where I have the opportunity to connect fundamental science with practical applications that make a difference.
When did you decide to pursue a career in industry?
I decided to pursue a career in industry during my postdoctoral research. I really enjoyed academic research and the freedom to explore scientific questions, but I found myself increasingly excited by the idea of seeing discoveries translated into products and technologies that make a difference in people’s everyday lives.
What has been the most rewarding part of your career thus far?
The most rewarding part of my career has been seeing scientific ideas and technologies move from the laboratory into commercial products that make a real-world impact. Throughout my time at PPG, I have had the opportunity to contribute to several technologies that were ultimately commercialized. There is nothing more satisfying than knowing that work you helped develop is being used every day to protect and beautify the world.
Another rewarding aspect has been collaborating with talented colleagues across disciplines. The most successful innovations are rarely the result of individual effort. They come from diverse teams working together toward a common goal, and I have been fortunate to work alongside exceptional colleagues throughout my career.
How has involvement with The Society of Rheology helped shape your career?
The Society of Rheology has been one of the most influential professional organizations in my career. My first SoR Annual Meeting was in 2011 in Cleveland, where I attended with my Ph.D. advisor, Professor Patrick T. Mather. As a graduate student, I was honored to receive a SoR Graduate Student Travel Award and present my research on the shape memory behavior of POSS-based polyurethanes. That experience exposed me to a vibrant community of scientists from both academia and industry and broadened my perspective on the many ways rheology can be applied to solve real-world materials challenges.
Throughout my career at PPG, SoR has continued to be an invaluable resource for professional growth. The annual meetings provide opportunities to learn about emerging developments in rheology, exchange ideas with leading experts, build lasting professional relationships, and identify opportunities for collaboration and innovation. The knowledge, connections, and sense of community I have gained through SoR have had a lasting impact on both my technical development and professional network.
After completing formal education, what is one new skill set that you developed/acquired that has been critical for your career?
One of the most important skills I developed after graduate school was leadership without formal authority. In industry, success often depends on influencing cross-functional teams, aligning stakeholders around common goals, and navigating competing priorities. Learning how to build consensus, communicate effectively, and lead through collaboration has been essential to my career growth.
What are the two most important non-technical skills for a career in science?
Communication - The ability to translate complex technical concepts into clear messages for different audiences.
Collaboration - Most meaningful scientific achievements are accomplished by teams, making trust-building and teamwork critical skills.
What was the biggest challenge moving from academia into your current career?
The biggest adjustment was shifting from focusing primarily on scientific excellence to balancing scientific rigor with business priorities, timelines, and customer needs. In industry, success involves not only generating knowledge but also delivering solutions that create value and can be implemented efficiently.
What is one piece of advice you wish you had received earlier in your career?
Invest as much energy in building relationships and networking as you do in building technical expertise. Your technical skills open doors, but strong networks and trusted relationships often create the biggest opportunities for growth and impact.
What advice would you give to students considering graduate school?
Pursue graduate school if you are genuinely excited by learning, discovery, and solving complex problems. Choosing the right advisor and research environment is just as important as choosing the right research topic, because these experiences will shape both your technical and professional development.
Graduate school is about much more than earning a degree. It is an opportunity to develop critical thinking, resilience, problem-solving skills, and a professional network that will benefit you throughout your career. The ability to tackle ambiguous problems and continuously learn may ultimately be even more valuable than the technical knowledge you acquire.
Looking towards the future, what are you most excited about in your career and/or science?
I am particularly excited about the increasing integration of digital technologies, artificial intelligence, and data analytics into R&D. These tools have the potential to fundamentally change how we discover, develop, and commercialize new materials and products by helping us analyze large amounts of data, identify patterns, and make better decisions faster.
For someone with a background in materials science and coatings, this presents a tremendous opportunity. AI and advanced data analytics can accelerate formulation development, and help us bring innovative solutions to customers more efficiently than ever before. I believe we are only beginning to realize the potential of these technologies to transform innovation.
At the same time, there are important challenges. The success of AI depends on the quality of data, scientific understanding, and human expertise behind it. As scientists, we need to ensure that we use these tools thoughtfully and responsibly, combining data-driven insights with fundamental scientific principles and practical experience.
From a career perspective, I am excited to be in a role where I can help shape how these technologies are incorporated into R&D processes and innovation portfolios. The opportunity to enable faster, smarter, and more impactful innovation across a global organization is something I find both exciting and rewarding.
If you could meet and have lunch with one scientist (past or present), who would it be and why?
I would love to have lunch with Dr. Fei-Fei Li, one of the pioneers of modern artificial intelligence. During my maternity leave last year, I read her memoir, The Worlds I See, and was deeply inspired by her journey. As an immigrant and a woman, she overcame significant challenges while making groundbreaking contributions to AI and computer science.
What resonated with me most was not only her scientific achievements, but also her focus on the human side of technology. She shows that innovation and empathy can go hand in hand, and that scientific leadership is about more than technical excellence. It’s also about creating opportunities for others and ensuring that technology benefits society. I would love to hear her perspective on how AI will transform the future of research and innovation, and how scientists can help ensure these powerful technologies are developed responsibly while keeping people at the center of the conversation.
Mentorship
How has mentorship impacted your career?
Mentorship has played a critical role throughout my career. Advisors, managers, and colleagues have challenged me to think broader, take on leadership opportunities, and pursue growth beyond my comfort zone. Their guidance helped shape both my technical development and leadership journey.
From the mentor perspective, what advice would you give to others serving as mentors?
Focus on helping mentees discover their own strengths and career aspirations rather than directing them toward a specific path. Listen actively, provide honest feedback, and create opportunities for growth while allowing room for independent decision-making.
From the mentee perspective, what advice would you give to mentees?
Take ownership of the mentoring relationship. Come prepared, ask thoughtful questions, seek feedback, and follow through on commitments. The most successful mentoring relationships are partnerships where both sides actively contribute.
Collaborations
What challenges and benefits have you seen from collaborations between academia and industry?
Academia and industry often operate with different timelines, incentives, and success measures. These differences can create challenges. However, when managed well, such collaborations combine deep scientific expertise with practical application, creating powerful opportunities for innovation and impact.
For hiring managers
When is the optimum time to start looking for jobs during graduate school?
I recommend beginning the exploration process 9-12 months before graduation. This allows time for networking, understanding different career paths, refining your resume, and participating in interviews without unnecessary pressure.
Does flexibility in job search play a role in current times, especially when the job market seems to be highly competitive?
Absolutely. Flexibility can significantly increase opportunities. Being open to different industries, functions, geographic locations, or adjacent roles can provide valuable experience and create pathways to long-term career goals. Often, career growth comes from opportunities you did not initially expect.