Greenspace Associates strives to deliver quality landscape designs, implement that design vision and then provide services to help clients maintain the beauty of their new landscapes. Greenspace meets that goal every day.

Mark Slifka, ASLA
Owner, Commercial Design and Sales
mark@greenspaceassociates.com
A licensed landscape architect in Iowa and Illinois , Mark earned his degree in landscape architecture from Iowa State University in Ames, Iowa. His design philosophy calls for form to follow function, repeat elements, clean lines and low maintenance. Mark is a past president of the Davenport Noon Optimist Club and the local chapter of the American Society of Professional Estimators. He is also a past Distinguished Lt. Governor of Iowa Optimist and a member of the American Society of Landscape Architects.

BJ Nordby, ASLA
Residential Design and Sales
ben@greenspaceassociates.com
Although BJ earned his degree in landscape architecture at Iowa State University in Ames, Iowa, his landscaping education and experience began much earlier with his first job at a local garden center. He has more than 13 years of experience with the plants he incorporates into his designs. He knows what plants will thrive in your yard and which ones to choose to make the most of each season in the Midwest. BJ is member of the American Society of Landscape Architects and is certified by the National Concrete Masonry Association for segmental retaining wall installation.

Sharon Westphalen
Landscape Design and Sales - Dubuque Market
sharon@greenspaceassociates.com
Sharon's nearly ten years of experience in the landscaping industry has given her a diverse knowledge set including design, irrigation, maintenance and technical service. She earned her degree in landscape architecture from Iowa State University. She is in the community in Dubuque, Iowa, as a member of the Dubuque Chamber of Commerce and Young People Dubuque.

Scott Voss
Lighting and Irrigation Design
scott@greenspaceassociates.com
Scott has designed and installed custom lighting and irrigation packages for more than ten years. He is a CIC-certified irrigation contractor, and brings a creative and experienced perspective to each project.

Michelle Tinman
Grounds Care Management
michelle@greenspaceassociates.com
Michelle's clients benefit from her dedicated customer service and her broad range of experience. She has been a certified arborist since 2004, and has extensive experience in both tree service and snow management. She was certified in the Davey Tree Horticulture program in 2005. Michelle is also an active member of the Quad City community, participating in local chambers of commerce, Davenport One, Junior Achievement, the Iowa Arborist Association, the Quad City Arts Festival of Trees steering committee, Bettendorf schools, the Bettendorf Family Museum and the Illinois Leadership committee.