When MSI Spa Design arrived at our newly purchased campground, the commercial swimming pool had not been in operation for many, many years and had fallen into great disrepair. Previous contractors took one look at the site and declared it unsalvageable, a major investment would be needed.

MSI Spa Design on the other hand, realized the original pool builders method of construction and determined that integrity of pool structure was sound. Once we established that the plumbing was still usable, the old swimming pool was saved and given a second chance. MSI Spa Design saved us a major amount of money which allowed us improve other parts of the property.


Ralph Norton
Camp Hidden Valley


The Beginning

Michael Stimson International (MSI, Inc.) was established in 1994 to design, build, service and repair commercial and residential pools, spas and water features in the mid-Atlantic region.  MSI’s clients ranged from homeowners and community pool boards, to general contractors and developers.  Taking a practical, role up your sleeves approach to each project has resulted in high client satisfaction and client referrals.  MSI continues to focus on commercial projects, and more information may be found at www.msispadesign.com.You can rely on us to complete your project on time, show up when we say we will, and apply our 35 years of expertise in the industry to give you the best service, design and construction outcomes.

In 2015 Big Star Aquatics, LLC began working in cooperation with MSI, Inc., with the focus on residential pools, spas and water features, as well as smaller commercial projects. Big Star Aquatics has the benefit of a design and construction expert with 35 years of industry experience to direct the design department.  A specialty of Big Star Aquatics is custom pools, spas and water features that enhance smaller spaces with the ability to cool, relax and enjoy the benefits of aquatics.  Some of these specialty designs are featured in the Portrait Gallery.

Below are brief bios of our partners.

Nancy Najarian

Greg Sarkissian

Michael Stimson

SpaDC in 2015, combining SpaDC’s excellent national reputation and experience with Big Star Aquatic’s innovation for the local market.  Serving the greater DC Metro area, Big Star Aquatics specializes in custom pools and water features, specifically geared toward clients with small spaces but great interest in cooling off.  With current clients in Northern Virginia offering excellent references, Big Star Aquatics is ready to serve all your pool and water feature design, construction, and service/repair needs.


  • Residential Pools – Design, Construction, Renovation, Repair
  • Commercial Pools – Design, Construction, Renovation, Repair
  • Water Features – Fountains, Ponds, Waterfalls, Spray parks
  • Day Spas – For Residential and Commercial Properties, including design and construction of custom spas, showers, and saunas
  • Sustainability and LEEDS Certification – Residential and Commercial Projects that incorporate energy efficiency, sustainable practices and materials, renewable energy and earn LEEDS Certification.

(202) 957-3521 | mike@msispadesign.com