About us

Decades of experience!


Coating Services Group is a privately held company with unique expertise in the area of physical vapor deposition (PVD) coating. We are located in Lakeside, California near San Diego. Since its inception, CSG has dedicated substantial resources to developing and refining coating technology for a number of commercial, industrial and medical applications. The company has several patents for its processes and products, and is continually developing new technology. Key innovations include functional coatings that increase the sharpness, durability and corrosion resistance of a variety of articles. Most recently, CSG has developed and marketed proprietary medical device products such as scalpel blades and bone saws through its IonFusion® Surgical division. Please follow this link to learn more about our medical device products and patents.


Get in touch

Our friendly and knowledgeable staff is available by phone or email. Monday - Friday, 8am-3:30pm.

Contact us! ▸


Our Team!

Hans Web.png


Hans Sleeuwenhoek

After completing his studies in Business Administration, Hans worked until 1994 for Wegener Direct Marketing Group. In 1994 he became Chief Executive Officer of Tactyl Technologies, a manufacturing company of healthcare products in Vista, California. After selling this company in 1997 he became Managing Director and Vice President of Safeskin Corporation, a Nasdaq company, producing healthcare products. At Safeskin he was responsible for all international markets. After selling Safeskin Corporation to Kimberly Clark Hans returned to the Netherlands and became CEO and owner of the Bell Sell Group. In December 2006 he successfully sold his group of companies.




Jeffrey Grant

Jeff has over 30 years of high technology manufacturing experience. He has a broad knowledge base in all phases of the product development cycle with specific emphasis on research and development, engineering, quality assurance, high volume manufacturing, regulatory affairs, and business development. During his career he has held key roles in successful start-ups, turn-a-rounds and high growth companies including a multiple year position in Asia as the Director of the Surgical Business Unit for a multibillion dollar US firm. Jeff’s career has included positions with Kimberly-Clark Corporation, SafeSkin Corporation (purchased by Kimberly-Clark), Phoenix Research (purchased by Union Carbide), Dural USA (purchased by Alcan, Inc.), among others.



San Diego State University
Quality Assurance & Business Management

Activities & Affiliations

• Founder of Metal Comb Works, a division of CSG.
• Business partners with CEO Hans for over 20 years!

Personal Interests

• Jeff enjoys restoring old Volkswagen buses in his free time and spending time with his family!


Nathan in Joshua Tree, CA.

Nathan in Joshua Tree, CA.

Junior in Teotihuacan, Mexico.

Junior in Teotihuacan, Mexico.

project coordinators

Nathan & Junior

Nathan and Junior manage and process just about everything that comes through the doors. From individual customer jobs up to large supplier batches, these two can answer just about any question you may have about our process, coatings, lead time or specifications.



Junior -
San Diego State graduate with a degree in marketing and a minor in Spanish.

Nathan -
MCC graduate with a degree in Social & Behavioral Sciences.

Activities & Affiliations

• Both Junior and Nathan spend a lot of time communicating with customers in the office and over social media platforms. If you’ve contacted us in the past, you likely spoke to one of these two!

Personal Interests

  • Nathan enjoys just about anything outdoors. Camping, rock climbing, road trips, you name it!

  • Junior enjoys travelling, learning about different cultures and spending time with family!