(616) 459-3539

Mary Witte



30 years of design experience in Interior and industrial design.

Founder of r.o.i. Design and formerly, Designers Workshop.

Committed to grow r.o.i. Design customers’ businesses through design.

Loves all areas of the arts, all sizes of dogs*, and all Lakers (GVSU).
*Has three rescued dogs: Moe, Dottie, and Bob.

Marianne Martz

Executive Interior Designer


Twelve-plus years of design experience in interiors and furniture-related design.

NCIDQ Certified, LEED Green Associate. Works in AutoCAD, Adobe, and Microsoft Software

Works to improve r.o.i. Design’s understanding of interior materials resources.

A new homeowner with a love of all animals and a side business of pet-sitting.

Ryan Bright

Creative Executive


Designer with 28+ years of experience in interior, graphic, and industrial design.

Master skills in AutoCAD and Adobe Creative Suite.

Oversite of r.o.i. Design’s deliverables and maintains quality standards.

Continues to improve his 100+ year-old home in Eastown with his wife and two kittens.

Lindsey Turner

Associate Interior Designer


More than ten years in design and architectural documentation.

Experienced in food service and restaurant design.

Committed to architectural compliance and problem-solving.

Commutes to r.o.i. Design from Kalamazoo leaving Gus, her White Highland Terrier, to manage the house.


Ronda Geyer

Product Procurement Manager & Project Manager


More than 20 years in project management, purchasing, and in-house sales.

Continually expanding resources and understanding of products and related finishes to meet customer needs.

Persistent and committed customer advocate.

Avid reader and gardener, recent empty nester, and mom to two dogs.

Julie Kleinjans

Finance & Marketing


30 years plus of office and business management, financial reporting, and cheerleading.

Over 25 years has valued how the r.o.i. team works together and provides the glue to our culture.

Loves her log home and all the dogs, cats, horses, and family in it!

Rayanne Rzepka

Studio Administrator

More than eight years of experience in administration and office management in resale, finance, and customer service.

Bachelor’s Degree in Public Relations.

Passionate about community involvement.

Working with her husband on their home improvement.

Cyndee Thenikl

Design Administrator 

Cyndee joins us with many years of administrative and sales experience. She has been a small business owner, and previously one of r.o.i. Design’s customers.

She enjoys singing and drumming with her rock and roll band, Twister, which performs in Michigan for club gigs and special events with cover songs from the 60’s to the 2000’s.

An avid kayaker, birder, and snowmobiler, she balances her outdoor passions with our part-time job that manages the administrative side of design contracts.

Her energy is welcomed, and we look forward to her improving our relationships with our design customers with better and consistent communication.

r.o.i. Design
1451 Front Ave NW, Grand Rapids, MI 49504