Mark Merkelbach is a civil designer and professional wetland scientist (PWS) with 17 years of local and international experience in managing complex projects and design teams centered around sustainable development, green stormwater infrastructure design (GSI), wetland and stream habitat design, water quality treatment, and sustainability analysis. He works with owners, stakeholders and design firms in all stages of project development from master planning, compliance, design, and construction. Under Mark’s direction, he has successfully completed projects with construction budget in excess of $100 million. These projects achieve  carbon reduction, water savings, water quality enhancement and habitat rehabilitation through green infrastructure planning and low impact development.        

BILL LUCAS, Ph.D. Principal Environmental Engineer


Dr. Lucas is recognized for his capabilities in stormwater modeling, hydraulic computations, and state of the art water quality design. He provides a wide breadth of knowledge and experience in optimizing green infrastructure stormwater infrastructure system functions and performance. Dr. Lucas is a national leader in advanced water quality systems, with 2 U.S. and 8 international patents and research now underway in five universities in over four nations.      

KEI-SING YIU   Landscape Designer / TW Office Manager


Kei-Sing Yiu is a landscape designer with 5 years professional experience in multiple-scale park design, recreational area planning, urban design, historical landscape preserve, stormwater treatment, and wetland design. He joined Green Earth Operations to work on local and international projects right after he graduated from University of Washington at 2014. As an in-house landscape designer, he produces quality diagrams to illustrate the technical knowledge to clients, and provides design ideas for varies scale of environmental engineering projects to create not only aesthetic value, but also multiple functions for people and nature.        

NIAN SHE   Principal


Dr. She has more than 25 years of experience in river/lake restoration, sediment remediation, water quality, hydrologic/hydraulic modeling, stormwater management and water resources planning and management. He was a senior civil engineering specialist with City of Seattle before joining Green Earth Operations. He is also a guest professor in Shenzhen University and Huazhong University of Science and Technology of China, and an international expert in LID, sediment remediation and river/lake restoration. He developed several innovative technologies in sediment remediation, river/lake restoration and holds several patents in sediment treatment processes.

JING ZHOU   Landscape Designer

Jing is a landscape designer who received her Master’s degree in Landscape Architecture from University of Washington. Her design focuses on the urban environment and interconnections with water features, ecological programming and green infrastructure. Before that, she studied Landscape Architecture in Beijing Forestry University, where she became experienced with designs of different scales – from the master plan to detail design.