As the daughter of a full-time artist and small business owner, Julie Boutilier-Berghorn has never lacked ambition and has always been a visionary. In her twenties, Julie moved to Maine and began her secondary education at the University of Southern Maine focusing on small business studies. Moving to Washington DC 6 years later, Julie started working for an upscale luxury design firm. During this time, she realized she had a gift for designing unique livable luxurious spaces through her sensitivity to each clients’ personal tastes and goals. Julie says, “It’s about developing relationships, listening, and letting love guide the process.” She realized designing livable luxury spaces could become a thriving business. After years of living in Washington, Julie moved back to Indianapolis in 1999, where she began working at her mother’s design firm. She studied Interior Design at Purdue University and bought Cornerstone in 2012.

Monica Due’s love of design began early. Frequent family travel, Broadway shows, and exposure to diverse cultures nurtured her eye for beauty and detail. After earning a Bachelor of Science in Interior Design with a minor in Entrepreneurship from Indiana University in Bloomington, Monica moved to New York City, where her design perspective expanded even further. There, she worked for a high-end boutique firm and was immersed in every aspect of the business from sourcing fabrics, furniture, and lighting, to collaborating closely with clients and contractors. Through this experience she refined a personal design aesthetic that blends modern, clean lines with an eclectic mix of antiques, layered textures, and sophisticated color palettes.

Monica returned to Indiana and joined Cornerstone Interiors in 2013, where she now acts as Senior Designer. She brings a fresh, modern approach to design while maintaining the relationship-driven service Cornerstone is known for. Monica’s natural ability to connect with clients allows her to create spaces that reflect who they are and how they want to live. She believes great design is a reflection of identity—a visual expression of what people love and what makes them feel at home.

When she isn’t designing, Monica channels her creative energy into travel, cooking, and gardening, where she finds inspiration in movement, beauty, and time with loved ones.

Emma Willner joined Cornerstone Interiors in 2021. She earned a Bachelor of Science in Interior Design from Purdue University at IUPUI, drawn to the field for its blend of creativity, variety, and challenge. Emma began her career at Cornerstone as Office Manager and quickly advanced into her current role, where she oversees communications, scheduling, and other project implementation tasks, bringing organization and empathy to every project. As Project Manager, she ensures each design vision is executed with precision and care, maintaining coordination between clients, designers, and contractors. Emma believes that collaboration and trust are the foundation of great design and values the relationships built throughout each project as much as the finished result. When she steps away from the bustle of projects, Emma feels rejuvenated through travel, time in nature, and meaningful moments with her community and faith.