Greg Heiland – Founder and CEO

Greg Heiland, a recognized leader in contamination control, has dedicated himself to promoting critical environment excellence for over 30 years. After graduating from Santa Clara University in 1982, Greg launched a 6-year career with American Scientific Products (Baxter/ VWR,/Avantor) in sales and management roles. In October 1988, Greg and his wife, Mary, founded Sierra Scientific, an Arizona based distributor of cleanroom products. They acquired the Texas based supplier, Class 10 in 1998, and started Valutek, a controlled environment consumables manufacturer in 2000. In 2002, Cintas acquired the distribution business. Based on client encouragement, Greg created the cleanroom wiki, Global Society for Contamination Control in 2005. Known as an industry expert, Greg is a frequent contributor to contamination control publications, trade shows, and the development of cleanroom standards. For his long-term commitment to IEST, he was awarded the 2018 Robert L Mielke award. When not promoting / endorsing the protection of product, people and practices, Greg enjoys travel, the outdoors and spending time with his family.



Mary Heiland – Co-Founder and VP of Human Resources

A native Californian, Mary graduated from the University of Southern California with a Bachelor of Science degree in Occupational Therapy. She began her career in neuro rehab at St. Jude Hospital in Fullerton, CA. She then worked as a pediatric OT for California Children Services in Orange County, CA and Howard County Schools in Maryland. In 1988, Mary co-founded Sierra Scientific with her husband, Greg, and subsequently Valutek in 2000. As our internal and external “goodwill ambassador”, Mary’s role as culture advocate, team builder, talent recruiter and celebrator is the heart of Valutek. Whether planning monthly themed “team appreciation” luncheons or celebrating any and all milestones, Mary’s legacy is her genuine care for the well-being of the team and the business. In her leisure time Mary enjoys cooking, crafting, volunteering, travel and keeping connected with 4 grown children and their exciting lives.




Peter Mattos - CFO

Peter Mattos, Chief Financial Officer, graduated from California State University, Chico, with a Bachelor of Science in Business & Accounting. A Certified Public Accountant, Pete has over twenty years’ industry experience. Throughout his career, Pete has provided the financial leadership in start-ups, turn-arounds, and large scale, publicly traded companies. He drives financial performance through a budget-based approach to leadership. Pete’s strengths include planning, analyzing, decision-making and executing. He develops reporting tools to ensure that the team is making data based decisions. Pete has the unique ability to develop the high-level strategy, as well as the skill set to translate that strategy into specific business processes. He develops the accounting and reporting systems to ensure that the progress toward company goals is easily measured. Pete is a “hands-on” CFO who leads by example. His skills on the golf course and bowling alley are equally impressive.




Matthew Ostwalt, East Critical Environment Specialist

Valutek is pleased to welcome Matthew Ostwalt, our new East Coast field sales representative based out of our North Carolina office. A graduate of Clemson University, Matt has over a decade of experience in critical environment hand protection supporting Life Sciences, Advanced Material, and Academia. Matt is a trained contamination control expert, and conducts rigorous research on his clients to better understand their glove and wiper requirements. His dedication to solution selling is genuine. “Valutek is fortunate to have recruited a recognized sales leader in our space. Matt’s commitment to client advocacy, and building long-term relationships are an ideal fit for Valutek,” says Greg Heiland, CEO.

Reach Matt directly at or call:
• Office: 828.771.6811 • Mobile: 828.782.4015



Fred Silva, West Controlled Environment Specialist

Valutek is pleased to welcome Fred Silva, our new West Coast field sales representative, based out of our Southern California office. A graduate of the City University of New York, Fred has over two decades of experience supporting personal protective equipment sales and training. As a native Spanish speaker, Fred will also support the Maquiladoras in Baja and Sonora, Mexico. Fred is a trained contamination control expert, whose high-energy commitment to technical solution selling is unmatched. “Valutek is privileged to have an individual with Fred’s integrity, professionalism, and energy, whose career success is based on genuine relationship solution selling,” says Greg Heiland, CEO.


Reach Fred directly at or call:
• Office: 619.678.2300 • Mobile: 530.717.5014



Tammy Featherston, Sales Operations Specialist

Since 2013, Tammy Featherston has provided leadership of our inside sales operation team by always putting the customer first. A consummate sales support specialist, Tammy has held customer service roles of increasing importance throughout her career. As the face of Valutek, Tammy delivers the ultimate customer experience by making it pleasant and hassle-free. She also inputs orders, handles online chat, resolves issues and tracks orders. Tammy makes sure our customers get the right product, in the right quantity, at the right price ON TIME. “As the first to arrive before sunrise, Tammy sets the tone of the day with her enthusiastic smile and can-do attitude,” says Greg Heiland, CEO.


Reach Tammy directly at or call:
Office: 602.761.2302



Saundra Rice, Sales Support Specialist

Saundra Rice joined Valutek in 2016 as a sales support specialist. A graduate of San Diego Mesa College, Saundra had a long career providing customer support in the financial services industry. With her high organizational skills, Saundra answers the phone, responds to email, inputs orders, does online chat and much more in a timely manner, ensuring that Valutek exceeds our customer’s needs.

“Saundra and Tammy are the gatekeepers of Valutek. Saundra’s natural poise and professionalism, along with her high attention to detail, are a huge asset to our inside sales support team and customer experience,” says Greg Heiland, CEO.


Reach Saundra directly at or call:
Office: 602.761.230



Ryan Heine, Southwest Field Sales Representative

Valutek is pleased to welcome Ryan Heine, our new ASouthwest field sales representative, based out of our headquarters in downtown Phoenix. A graduate of University of South Dakota, Ryan previously sold software into the educational market. A teacher at heart, Ryan taught elementary education and English as a foreign language in Korea.
For the past year, Ryan provided exceptional onsite inventory support for Valutek in the local Arizona market. According to Greg Heiland, CEO, “Ryan brings empathy and hard work to the Valutek team. As a natural teacher, he is curious and has an innate desire to help his customers have the best outcome”.




Cindy Navarro - eCommerce Manager




Megan George – Staff Accountant

Megan George graduated with a Bachelor of Accounting from the University of Akron. She was hired as an Accounting Manager with Aramark after working for the company during college as an Accounting Clerk. Upon moving to Arizona, Megan worked as a tax accountant for Safeway before joining the Valutek team as staff accountant. Megan demonstrates a remarkable ability to multi-task in her role that includes daily accounting tasks in accounts payables and accounts receivables, as well as monthly reconciliations and financial reporting. In addition to her remarkable accounting skills, Megan has excellent financial acumen from a business budgeting and expense control perspective. In her leisure time, Megan enjoys shopping, spending time with family and travelling in her camper throughout the Southwest with her boyfriend and 3 dogs.


Sharon Looi – Staff Accountant




Dennis Mayne – Warehouse Supervisor


Jose Hernandez – Warehouse Coordinator




Tim Huot – Warehouse Coordinator, Onsite Coordinator




Terrance D’Angeles – Director of Asia Operations


Dawn Ho – Inventory Analyst




Siew Peng Liew – Inventory Analyst




Chris Brown - Technical Service Engineering Manager

Chris Brown, Technical Service Engineering Manager, earned a degree in Nano-scale Engineering from SUNY College of Nanoscale Science & Engineering (CNSE), and a master’s Degree in Mechanical Engineering from Clarkson University, Capitol Region Campus. He also earned a bachelor’s degree in Business Administration and an Associate degree in Entrepreneurship from Johnson & Wales University in Providence, RI. Chris was a CNSE researcher and led an investigation that explored the cleanliness of clean film packaging. He is active in technical standard groups including CETA and IEST. Chris has participated as an industry expert panelist @ IEST Technical Conferences and holds several certifications in the controlled environment industry relating to the maintenance, testing and certification of controlled environments, biosafety cabinets, and fume hoods. He is an experienced contamination control expert with a proven track record in the controlled environment industry. Chris enjoys spending his free time with his wife and 3 children in upstate New York.


Vijendraan Venkitasalam – Quality Manager




Why do we exist? Our mission is to help our critical environment customers achieve productivity, yield, and compliance goals.



We do the right thing for the customer.
We are in this for the long haul.
We make decisions based on data and manage the company assets like they are our own.
We want our employees to act as owners.




Valutek - Keeping it clean since 1988

Valutek has been servicing the controlled environment needs for thousands of organizations in the life sciences, advanced material and academia since 1988. Valutek offers our clients best-in-class products and exceptional customer service. Valutek does not just meet your demands - we consistently exceed them, and has fostered a culture of continuous improvement. Valutek has built our reputation on quality, performance, dedication and knowledge, providing our clients with a trusted business partner you can count on for years to come.



Valutek understands that you have less time and more responsibilities than ever before. Supplying cleanroom consumables for your controlled environments has to be fast and easy. We want you our customer to purchase Valutek products however you like to purchase your consumables. That’s why we’ve built our company around your needs with the ability to purchase through your favorite supplier or just by calling Valutek to find out how best to purchase Valutek products; we are here to take great care of you. For all other questions, your answers are only one click, email, or phone call away with technical support and our library of online product data sheets.


Valutek product categories:

There are 8 product categories that our logo represents:


Knowledgeable, consistent industry leadership

Valutek is committed to sharing and enhancing knowledge in the contamination control arena. Valutek is a founding sponsor of the Global Society for Contamination Control (, an independent material testing laboratory and organization focused on advancing contamination control through knowledge exchange and collaboration. In addition, Valutek is an active participant in the leading professional organizations, (IEST, ESDA, INDA, ASTM) and a technical contributor to leading conferences (SEMICON, Interphex, MDM).


Proven technology leader focused on quality and performance

Before our products meet your own stringent requirements, they need to meet ours. Valutek is the only manufacturer to provide ongoing independent testing, performed at GSFCC’s laboratory at the world’s largest nanofab complex, SUNY POLYTECHNIC. Our close attention to quality control and commitment to continuous improvement ensures that you will always receive the highest quality products.


Agile, trusted partner dedicated to value innovation

We are your trusted partner, focused on helping your organization succeed. Along with our commitment to one-source convenience, Valutek’s service commitment permeates all aspects of our organization, and is dedicated to only one mission: serving your controlled environment needs. Our in-house client success team of knowledgeable, technically competent professionals responds to your requests quickly, from order tracking to product specifications, to certificate of compliance.


Product expertise

Three product lines engineered for your specific critical environment. Valutek makes it easy for you to pick the right products for your controlled environment. Look at these symbols next to each product type: