Meet Our Team

Gregg Barcelow

Gregg has been working professionally with natural aquariums, specializing in coral reef systems, for over 30 years. While studying zoology with a concentration in zoo and aquarium science at Michigan State University, he began working with the design, installation, and husbandry of marine aquariums at a nearby aquarium store. Studying and working with natural marine ecosystems served to spark not only Gregg’s passion for the science of the ocean world, but also the drive to understand its processes and the creativity to replicate it for our clients.

Gregg serves Aquarium Design Professionals as staff scientist, chief aquarium designer, consultant, quality control manager, and education curator. Whether during the initial design phase or well after project completion, Gregg works diligently with our clients to ensure that their vision is delivered and maintained. In addition to natural aquariums, Gregg’s other passion is science education. Gregg holds a Professional Educator License in the state of Illinois, and currently teaches Biology and Ecology for Chicago Public Schools.

Mark Gray

From the time he was a child, when his father began keeping exotic fish, Mark has been surrounded by aquariums. For more than 40 years, he has worked with aquatic systems, ranging from delicate planted discus systems to saltwater aquariums several thousand gallons in volume. An avid SCUBA diver, Mark has spent time exploring the coral reefs of Cozumel, the Bahamas, and the Dominican Republic. This passion for the underwater world has driven him to master the creation of a wide variety of aquatic systems for demanding clients. 

Mark serves Aquarium Design professionals as operations manager, project manager, life support system designer construction and plumbing specialist, and consultant. Being a licensed plumber, Mark has the technical ability to get water from one place to another and back, regardless of the scale and complexity of the project. Over the last several years, Mark has been involved with the design and construction of the Sea Dragon Display at Shedd Aquarium, the design of the life support system for the Moon Jelly Display and Hatchery at Brookfield Zoo, and was part of the team that captured sharks and other marine fish for the Georgia Aquarium. Under Mark’s guidance, projects are delivered on time and to specification.

Marco Gray

Following in his father’s footsteps, Marco has been enamored with aquatic ecosystems since he was a young child. Starting by designing and managing luxury koi ponds, Marco now specializes in coral curation, propagation, and aquarium life support system design. Always having his finger on the pulse of advancements in the coral reef aquarium industry, Marco has a keen eye for melding cutting edge design and technology to help bring our clients’ visions to life.

Marco serves Aquarium Design Professionals as staff marketing specialist, aquarium design consultant, aquarium maintenance service manager, livestock procurement and care manager, and client support specialist. 

Brian Kociuruba

Brain has always been connected to the ocean. As a New York native who eventually moved to Florida, Brian has spent his life around salt water. His time in the ocean inspired his curiosity about marine aquariums, which became a central part of his life. He eventually turned that passion into a career, and he has been designing, installing, and maintaining saltwater coral reef aquariums since 2017. One of Brian’s true loves is scuba diving, and his time underwater helps inform and shape his view about what an reef aquarium should look like and how it should operate. Brian makes sure that no stone is uncovered in the aquarium design and installation process.

Brian serves Aquarium Design Professionals as the chief aquarium installation coordinator, project estimator, consultant, and construction specialist. With Brian overseeing the installation process, clients can rest assured that the process will be seamless, organized, and completed to specification on time. His carpentry abilities allow Aquarium Design Professionals to provide an exceptional level of customization, as aquarium cabinetry can be expertly matched to existing decor. In addition to his aquarium work, Brian, an Army veteran, has worked closely with coral reef conservation efforts such as Ocean’s Reef Project and Ocean Rescue Alliance International.

Nate Reinhart

Nate’s skills, experience, and passion represent the convergence of conservation, education, and engineering. Originally from Pennsylvania, Nate has always been deeply embedded in nature and conservation. Upon earning his MS in Environmental Science, Nate worked as a fisheries biologist for the Pennsylvania Fish and Boat Commission and the Maryland Department of Natural Resources. After moving to Chicago as an environmental compliance consultant, Nate used his love of aquatic ecosystems and technical experience to develop specialized aquaponic systems for use in schools and other educational settings.

Nate serves Aquarium Design Professionals as a staff scientist, conservation and environmental engineering consultant, natural pool designer, and science education curriculum designer. With his strong environmental science experience and conservation background, Nate understands how to make aquarium practices sustainable and environmentally sound. Additionally, Nate believes strongly in science education, and he also currently teaches Physics and Biology for Chicago Public Schools.