LEADERSHIP
John S. Nicholson
Chairman
John Nicholson is an Executive of PVS Chemicals, Inc. located in Detroit, Michigan. Mr. Nicholson is also a member of PVS’s Board of Directors and sits on the Governance, Safety & Risk Assessment, and Strategy Committees.
Mr. Nicholson spent the early part of his career in the finance industry at LaSalle Bank. In this role, Mr. Nicholson worked in the Treasury Department and had responsibility of supporting LaSalle’s clients with cash management services.
Mr. Nicholson graduated with a BA from DePaul University in 2005, and with an EMBA focused on family business from Kennesaw State University in 2012.
Pisesh Lertvilai
Managing Director
Pisesh Lertvilai is the Managing Director of Siam PVS Chemicals who oversees the company's operations, strategy, and performance, ensuring business growth and long-term sustainability while leading senior leadership and aligning company objectives.
For more than 40 years, Mr. Pisesh has played a pivotal role in the company’s growth, advancing through leadership positions from Project Engineer to Managing Director.
Mr. Pisesh graduated with a BS in Chemical Engineering from Chulalongkorn University in 1981, and with an EMBA from Sasin School of Management of Chulalongkorn University in 1998.
Kampanat Krasachol
Plant Director
Kampanat Krasachol is the Plant Director of Siam PVS Chemicals, responsible for leading plant operations, ensuring safety, quality, and productivity while coordinating resources, compliance, and continuous improvement initiatives.
With nearly 40 years, Mr. Kampanat advanced through the rank from Production Engineer to Plant Director.
Mr. Kampanat graduated with a BS in Chemical Engineering from Chulalongkorn University in 1986.
Pathanasak Sirasitthichoke
Finance and Administrative Director
Mr. Pathanasak Sirasitthichoke is the Finance and Administrative Director at Siam PVS Chemicals, overseeing the company’s finances and key administrative functions, including HR and IT. He leads financial operations and compliance, ensuring alignment between financial strategies and business objectives.
With more than 25 years of experience in the chemical industry, Mr. Pathanasak brings expertise in finance and accounting, with a strong focus on budgeting, forecasting, reporting, compliance, and financial analysis.
Mr. Pathanasak graduated with a BBA in Accounting from Assumption University in 1996.
Sewika Chongpiyawayang
Sales & Marketing Director
Sewika Chongpiyawarang, is Sales & Marketing Director of Siam PVS Chemicals who is marked by a passion for strategic vision and collaborative leadership to boost our sales figures and customer-centricity with our sales & marketing team.
With experience in the specialty and commodity chemical industries from global chemical companies in sales management level and having a unique blend of technical knowledge and business acumen, Ms. Sewika has led to significant expansion into new market sectors resulting in a sales increase for the company.
Ms. Sewika graduated with BSc. Chemistry, MSc. Petrochemistry and Polymer Science from Chulalongkorn University in 2000 with Mini-MBA from Kasetsart University in 2008.