ABOUT

About

Our Story

Prostone Services is a family legacy of restoration craftsmanship.


In 1980, the founder, Albert Ong, started a janitorial business in the San Francisco Bay Area that developed into an all cleaning company called Ambassador Services. He was one of the few Master Textile Technicians in the Peninsula at the time.  As natural stone surfaces became more prevalent in modern residential and commercial environments, he expanded into a specialization of natural stone surface restoration, care, and maintenance. In 2017, Ambassador Services was officially rebranded to Prostone Services.


Albert taught his sons, Jonathan and Anthony, the trade at an early age—passing down the skills and knowledge acquired throughout many years in the industry. They now lead the company as veteran licensed professionals, where they continue the family legacy of restoration craftsmanship and dedication to customer satisfaction.

Our Team

Professionals


Jonathan Ong

Co-owner

Jonathan began his journey in the industry at the young age of 5 under the guidance of his father, Albert.  Accumulating over 26 years of experience in the industry, Jonathan has seen the shift from textiles to hard surface flooring firsthand. He has acquired expertise in both modern methods and procedures as well as old fashion techniques and trade secrets. He will provide the most effective solutions for every project and is dedicated to quality craftsmanship.


Jonathan is a graduate from San Jose State University and is also serving in the United States Army Reserves as an Engineer Officer of a construction company. His work ethic, developed from a young age along with extensive project management experience in the Corps of Engineers, puts him in charge of operations and logistics at Prostone Services. His vision is to grow the company around craftsmanship and hire Veterans and/or Disabled Veterans to be able to continue to serve those who have once served us.


Anthony Tirtoprodjo

Co-owner

Anthony also began his journey in the industry at the young age of 5, under the guidance of his father, Albert. Accumulating years of experience working in the early days of the family janitorial and cleaning business, Anthony has acquired an expertise in handling a variety of tools for cleaning commercial buildings and residential homes.


After graduating high school, he explored other opportunities outside the family's cleaning company, such as the food and beverage industry—serving, bartending, and managing bars and restaurants. He also attended Brooks College for art, graphic design, and marketing. But he eventually shifted focus into the handyman and carpentry trade to better utilize his strong foundation in tool handling. With extensive experience in customer service as a handyman, he returned back to the family business with a new found love of restoration craftsmanship alongside his brother.

2,000+

Happy

Clients

3,000+

Properties

Restored

7+

Licenses &

Associations

40+

Years of

Experience

Our Values

Define Our Work Ethic

Craftsmanship

We use the best technologies, tools, and expert techniques to ensure you get the best results.

Reliability & Trust

Trust us to be reliable and able to provide the best solutions that fit your needs.

Customer Satisfaction

We will work closely with you to make sure that you are completely satisfied.

Professionalism

We will take care of your cleaning and restoration needs with utmost integrity and professionalism.

Licenses and Associations

We Work Above Industry Standard

Get in Touch!

We want to help you with the perfect restoration solution. Let us know and we’ll do our best to help. 

Contact Us
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