Robert’s son Charles R. Johnstone joins the firm.


Robert Johnstone hard at work in his thriving architecture studio.


Over 70 years later, and Apex Design Build has evolved into a world class company, integrating design and construction for premium healthcare facilities across the United States.


Offering a full range of design, architecture, and construction services, the firm rebrands as Apex Design Build.


Steve’s sons—Randy, Sam and Bruce—join the firm and become the fourth generation of the Johnstone family at Millwood Services.


Having developed a firm widely recognized for its healthcare design capabilities and its renowned cabinetry brand, Millwood Services continues to grow in healthcare architecture, design and construction management.


Johnstone Contracting is renamed Millwood Services to better reflect their new manufacturing capabilities.


As the second and third generations expand the business, Johnstone Contracting relocates to a larger facility and begins manufacturing its own brand of millwork for both residential and healthcare clients.



With the war over and construction booming, Robert Johnstone obtained his architecture license and opened Robert P. Johnstone Architects in the attic of his home in Oak Park, IL.



Robert P. Johnstone Architects had built a recognized name and a well-respected reputation in the Chicagoland area.