Our Team

Xamax Composite Surface Veil consists of a large class of synthetic fabrics designed to absorb liquid resins. These resins can be epoxy, bismaleimide, or styrene based like polyester or vinyl ester varieties. The composite reinforcement fibers are typically glass, but can also be carbon or aramid.

The use of a surface veil on a laminate composite surface offers protection from chemical corrosion and abrasion. Veils are high melt polyesters that have an excellent appearance and surface smoothness, making your product look aesthetic. Our surfacing veils can be customized to your needs based on weight, aesthetics, chemical free fibers and surface treatment additives (like optical brighteners, TiO2, UV additives and microbial treatments). Depending on your application, they can also be printed with different colors to enhance surface effects

Margaret Pederson

Chairwoman, Chief Executive Officer and President

Margaret brings big company experience from her background running service and technology companies  to add processes and tools while continuing the entrepreneurial spirit of Xamax.  Her focus is on developing and implementing a proactive growth strategy by commercializing existing Xamax products, creating new products, identifying new materials and adding strategic alliances; she also is dedicated to maintaining and building our management team. Her earlier career included Division President and other senior management roles at Fortune 500 companies and private organizations.  Her education includes Harvard Business School, London School of Economics and University of Virginia Honors Program.  She is an experienced director of public and private companies and NFPs  

Bob Markowski

VP/General Manager

With over 25 years at Xamax, Bob combines his varied experience in customer account management, operations, sourcing, and new product development to lead business strategy to the next horizon. His efforts consistently exceed customer expectations and keeps Xamax at the forefront of product innovation.

Bob holds a BS in Mechanical Engineering from the University of New Haven, MS in Operations Management and an MBA in Sales/Marketing from Rensselaer Polytechnic Institute. In addition, throughout his career he holds 25 patents in the fields of electrical/mechanical devices and thermoplastic composites and processing.


Sal Mancini


Sal has a 25 year record of productivity, professionalism and performance in operations. He has a strong knowledge of manufacturing and operations management. He is a hands-on leader with experience in every phase of the manufacturing, engineering and quality process.


Purchasing Manager and Senior Sales Account Manager

Carol is a Xamax veteran who combines her expertise to work in both purchasing and sales. Her knowledge prepared her well to manage buying even in these difficult times with supply chain disruption.  She also provides in-house sales and customer support providing answers quickly and efficiently. Her friendly, professional manner delights customers, and her extensive twenty six year career at Xamax has enabled her to acquire significant knowledge of company’s products, services, processes and timelines.

Randy Zajac

Composite Sales Engineer

Randy Zajac is a Xamax sales and technology expert having joined the team  team with almost 2 decades of composites experience. He has specialized in thermoset resins and adhesives used in fiber reinforced materials. With experience in R&D to Application Development, to Process and Manufacturing Engineering he always looks forward to helping clients in the composites field and beyond.

Business Development Manager

This is an open position where we are actively recruiting.  Please contact us if you are a sales and commercialization oriented person with a technical background.  We would be especially interested if you have a material science, nonwovens, composite background.  See Career Opportunities for more details 

Dave Miller

Dave Miller


Dave Miller comes to Xamax Industries with three decades of electrical and construction sales experience. He has an extensive sales and marketing career in Electrical and Construction related Industries, including Product Marketing, Distributor Marketing, Sales/Sales Management in manufacturing and B2B Media.  He also has experience in High Voltage Transmission & Distribution in teh Electric Utility Power Deliver Industry. He looks forward to working closely with your team to recommend the right materials for your electrical applications. Dave is a graduate of Northern Illinois University.

Frank Smith

Sales Account Manager

Frank applies his experience and knowledge in the Thermoplastics, Thermoset and Composite Industries to aid customers in their material requirements. He works closely with current customer as well as developing new business opportunities. Frank strives to makes sure the customer has the correct materials for their applications in a friendly, professional, and timely manner.

Frank Smith

Kevin Coster

Quality Manager

Kevin Coster has joined the XAMAX team as Quality Assurance and EHS Manager. Kevin holds an MBA from the University of Phoenix and a bachelor’s degree in Electrical Technology from SUNYIT-Utica / Rome. He is a Quality professional with more than 30 years of experience in manufacturing products serving many different industries.

We are excited about the enthusiasm Kevin brings to the XAMAX team, utilizing his proficiency in SPC, DOE, FMEA and overall process improvement to achieve the goals of our stakeholders and meet our customers’ ever-increasing expectations.

New Product Development Engineer

This is an open position where we are looking for someone to join Xamax.  The ideal candidate has a  MS or BS in Materials Science & Engineering.  The new hire would  bring a scientific background to the team in experience or expertise in materials science involving lab work, experimental design & setup, data analysis and more. Your skills will assist the team in research & development, product innovation, technological and engineering specifications, and product solutions to our customers.

Roberta Boyle

Roberta Boyle


Roberta Boyle is an experienced finance professional with extensive experience in daily finance operations,  monthly financial reporting and budgeting and forecasting.  She went to Northeastern University to get her Bachelor of Science in Accounting and Business Administration and has an MBA from Fordham Gabelli School of Business. Roberta also is a certified CPA (Certified Public Accountant).

Michele Scott

Vice President Human Resources

Michele brings twenty-five years of human resource experience in several industries including technology, financial services, construction and retail. Her expertise includes employee relations, staffing, recruiting, compensation and performance management. Her also is familiar with rapidly growing companies and the HR related policies associated with growth including talent management.

Michele Scott
Denise Medved

Denise Medved

Advisor on Growing Revenue and Transformation

Denise is an expert on growing companies through processes, technology, data and training. Her two decades in sales management has driven significant revenue growth and resulted in high achieving teams. She thrives on identifying technologies and methodologies for improvements and implementing changes. Denise is also a successful entrepreneur and published author.

Martin Weinberg

In Memory

Xamax Founder, President, CEO and Chief Inventor Engineer | Entrepreneur | Inventor | Leader

Martin Weinberg joined Sterling Paper as a student engineer. He led manufacturing and product development for fifteen years before leaving to found Xamax Industries in 1992. Martin later merged the two companies and grew Xamax Industries from a US focused company providing electrical insulation to a global company producing industrial, consumer and technical products. Martin lived his philosophy ‘Imagination Becomes Reality’ by making it his daily practice: writing dozens of patents and creating inventive products to solve customer problems.

Martin taught his colleagues, both internally and externally, many lessons:

1. Create your own path;

2. Live fully and appreciate life;

3. Give willingly;

4. Don’t give up, be creative finding solutions;

5. Be curious and keep learning;

6. Take risks

Martin fought cancer heroically, patiently, diligently; his spirit continues to infuse Xamax’s vision, culture, products and customer service. His family remains committed and engaged with Xamax. All of us at Xamax are dedicated to continuing Martin’s legacy, living his values, remaining devoted to our colleagues and partners and building on the strong foundation he built.