Thomas Oslund

Principal/Partner and Director of Design | FASLA, FAAR

Tom is considered one of the leading design landscape architects in the country. Tom’s interest in art and his passion for design are fueled by a commitment to excellence and innovation. Tom has more than 35 years of experience at a variety of project scales from 800-acre master planning efforts to a 5000-square foot rooftop garden. Tom is known for designing engaging landscapes for some of the most discerning local, national, and global clientele. The studio he established in 1998, O2 Design (formerly oslund.and.assoc.) has consistently produced award-winning work, tallying over 65 local, national, and international awards.

Tom received the Star Tribune “Artist of the Year” Award in 2012 for his integration of art in urban design. His belief in the collaborative process of working closely with clients, architects, engineers, fabricators, and artists has yielded positive results and international recognition as an innovator when it comes to solving complex site design challenges. Tom has also taught and lectured world-wide on his work.

Harvard University Graduate School of Design, Masters in Landscape Architecture, 1986
University of Minnesota, Bachelors in Landscape Architecture, 1980
International Travel Grant, Europe, 1979
Received the Rome Prize Fellowship in Landscape Architecture from the American Academy in Rome, 1991-1992

Jay Coatta

Managing Principal/Partner

As a founding partner, Jay brings a passion and entrepreneurial spirit to any situation that can confront a design firm. As managing partner, Jay is responsible for the day to day operations of O2 Design (formerly oslund.and.assoc.), including all financial affairs, contracts, staff performance, and balancing of current work load schedules. Jay’s background in business has provided a sound foundation for office procedure and responsiveness to our clientele. His methodology of balancing value, quality, and fiscal responsibility have been the cornerstone of success for O2 Design. Over the past 18 years, Jay has embraced the complexities of managing a design firm within an ever-changing economic environment. His abilities and creative approach to managing change within the profession – both technologically and fiscally – has ensured that O2 Design remains current and competitive in the marketplace.

His interest in golf and skill level led him to earn medalist honors in the 1993 U.S. Mid-Amateur Tournament. That interest has led to the involvement of O2 Design in many golf course and resort master planning and design efforts.

Harvard University Graduate School of Design, Certificate of Recognition – Golf Course Architecture, 1999
Gustavus Adolphus College, Bachelors of Science in Financial Economics, 1987


Tadd Kreun

Principal/Partner | FASLA

As a principal and partner in the firm since 1998, Tadd has the responsibility for the design and management of O2 Design’s (formerly oslund.and.assoc.) largest and most significant projects. Tadd has over 24 years of experience on several projects ranging in size from residential projects, courtyards, and gardens to large campuses and professional sports facilities. His ability to take ideas and develop them into working solutions are outstanding and his passion for construction and technology merge together beautifully during the course of the design process. From early ideas to construction supervision, Tadd’s creativity is apparent. His experience on large, complex site projects and his ability to manage the construction process has contributed to many of the award-winning projects for the firm. Tadd’s positive attitude and uncompromising desire for excellence has made clients, contractors and consultants pleased to have had the experience of working with him. Tadd was honored by the American Society of Landscape Architects by becoming a Fellow in the fall of 2010 based on his outstanding accomplishments and professional excellence of his work.

University of Minnesota College of Architecture and Landscape Architecture, Bachelors of Landscape Architecture, 1992

Catherine Murray


As Principal of the Chicago Office of O2 Design (formerly oslund.and.assoc.), Catherine is responsible for design and project inception all the way through construction completion. Her vast experience within a variety of office scales provides a valuable resource in helping shape the team’s approach toward any design challenge. Catherine’s creative talent and experience over the last 29 years has produced notable projects both within the United States and internationally. She is known for working collaboratively with a variety of design disciplines through all phases of the design process. Her creativity and positive attitude has produced award-winning solutions for complex design challenges for a wide range of urban design, corporate, and academic campuses. The experience she brings to any design challenge is formidable and thoughtful. Her ability to work with clients and communicate simple ideas to complex design problems is an asset to every project team with which she works.

Harvard University, Masters of Landscape Architecture, 1986
University of California, Berkeley, Bachelors of Landscape Architecture, 1982


Sandra Rolph

Associate Principal | ASLA, LEED AP

In addition to a MLA degree from the University of MN, Sandra holds a BS in Environmental Science Hydrology/Climatology, and an MSc in Physical Geography from the University of British Columbia, Canada. Her skill in blending scientific and design thinking makes her an excellent addition to the studio, as does her proficiency in presentation graphics, 3D modeling, and urban design explorations using Revit. Sandra’s involvement on projects ranges from broad-scale master planning to small site design, with a focus on sustainability in corporate/academic campus environments. Sandra blends the worlds of science, and research, and design by contributing her deep understanding of the social and ecological function of the environment and its ethical stewardship to each of her projects. As a LEED AP, Sandra views the green building movement as a great opportunity to enrich our projects with the careful integration of sustainability with artful design and innovation. She works from project inception through LEED certification to ensure that our clients sustainability goals are met, while seeking opportunities to educate the public about the relationship between our natural and built environments.

University of Minnesota, Master of Landscape Architecture, 2007
University of British Columbia, British Columbia, Canada, Master of Science, Physical Geography, 2002
McMaster University, Ontario, Canada, Bachelor of Science, Environmental Science, 1999

Han Zhang

Senior Associate | PLA, LEED AP BD+C

Han joined O2 Design (formerly oslund.and.assoc.) in 2012 and quickly grew to become a crucial member of the professional team. Highly detail-oriented and work-focused, she delivers exceptional work on sophisticated construction projects. She applies holistic and systematic thinking in master planning and design projects to provide innovative solutions to complicated issues. Her experience in the landscape architecture practice ranges from private residential projects to hundred-acre master plans. Han has design interest in urban environment, waterscape, and brownfield design. Her design philosophy is deeply influenced by her dual-culture background, allowing her to provide projects with her own unique character, cultural interpretation, and inspiration. Devoted to and passionate about her work, Han pursues simplicity, functionality, and artistry in design. Han also currently is an adjunct assistant professor at the University of Minnesota College of Design.

University of Minnesota, Masters of Landscape Architecture with American Society of Landscape Architecture Student Honors, 2013
Tongji University, Shanghai, China, Bachelors of Landscape Architecture with Excellence, 2011

Mya Kesler

Senior Associate

After receiving a Bachelor of Science in plant biology from the University of Illinois/Champaign Urbana, Mya received her Masters in ecological management at Duke University.  Mya then moved to the San Francisco Bay area and started a landscape contracting firm, Fiddlehead Gardens, managing the project design and construction for residential and commercial clients. After moving to Minnesota in 2013, she received her Masters of Landscape Architecture from the University of Minnesota. Her thesis concentrated on the benefit of creating pollinator habitat in urban areas. Her diverse career in different regions of the United States has made her a valuable associate with O2 Design (formerly oslund.and.assoc.). Mya designs in an intentional manner, focusing on designing landscape architecture that supports valuable ecosystem services.

University of Illinois, Bachelor of Science in Biology & Plant Ecology, 1998
Duke University, Master of Environmental Management and Master of Forestry, 2000
University of Minnesota, Master of Landscape Architecture, 2016

Matthew Kessler

Senior Associate

Matthew embeds a curiosity for the built & natural worlds into the detailed minutia of each project he works on from concept through construction. After studying music production at an independent music college in St. Paul, MN, he received both his Bachelor of Environmental Design (2012) and Master of Landscape Architecture (2014) from the University of Minnesota, winning the coveted Capstone Award. Matthew spent the first 5 years of his career in Dallas, Texas designing & managing large scale master planned community projects, urban plazas and city parks projects. He brings a focus to O2 design (formerly oslund.and.assoc.) on 3D visualization as a design tool fundamentally transforming our production methodology. His experience was instrumental in achieving multiple communication awards from the Texas chapter of the ASLA. He was also named Adjunct of the Year 2018 for his work at the University of Texas – Arlington in the College of Architecture, Planning & Public Affairs teaching digital modelling and post production techniques. He believes that people deserve to live among beautiful thoughtful places and that landscape architecture is uniquely situated as a profession to be the most innovative transformative force for the future.

University of Minnesota, Master of Landscape Architecture, 2014
University of Minnesota, Bachelor of Environmental Design,  2012

Shuwen Ye


Shuwen is a recent graduate from the University of Pennsylvania with a master’s degree in landscape architecture. In her master thesis work, she focused on post-disaster recovery and ecological restoration in coastal Ecuador, she continues this connection post graduation. Shuwen also holds a bachelor’s degree in architecture, thus bringing the benefit of a multi-disciplined perspective to projects, conscious of the connection between landscape and architecture. In the design process, Shuwen excels at unearthing the potential within each location through thoughtful research and creative design strategies.

University of Pennsylvania, Master of Landscape Architecture, 2017
Zhejiang University, Hangzhou, China, Bachelor of Architecture, 2015

Yuqi Yan


Yuqi joined O2 Design (formerly oslund.and.assoc.) in 2017 and quickly grew to become a crucial member of the professional team. Yuqi graduated from the University of Minnesota with a master’s degree in landscape architecture. Living in multiple countries throughout her life stimulated her interest in cultural diversity and community engagement in landscape design. Coming from a background in environmental art design, she infuses the design with creative thinking and artistic inspiration. Her passion and work experience have also ignited her interests in urban hydrological systems and ecologically-sensitive design. As a valued design team member, Yuqi is detail-oriented and work-focused; she consistently delivers exceptional work on complex construction projects.

University of Minnesota, Master of Metropolitan Design, 2019
University of Minnesota, Master of Landscape Architecture with American Society of Landscape Architecture Student Merit, 2017
Shenyang Jianzhu University, Bachelor of Environmental Art Design, Shenyang, China, 2013


Fei Liu


Fei is a recent graduate from the University of Minnesota with a Master’s degree in Landscape Architecture. While pursuing his graduate degree, he received the Student Design and Scholarship Excellence Award and two ASLA-Minnesota student design Awards. He is highly skilled in 2D and 3D graphic design to create distinct planning and design communication tools for clients and solving the most efficient way to delineate complicated design concepts. Fei brings innovative and fresh new ideas to our design solutions. His enthusiasm for exploring unique approaches that unite traditional Chinese landscape expressions with current design thinking help create sustainable, poetic and beautiful design solutions.

University of Minnesota, Master of Landscape Architecture, 2018
Ningxia University, Bachelor of Landscape Architecture, 2011

Juhyuk Lee


Juhyuk Joined O2 Design (formerly oslund.and.assoc.) in Summer 2019. He has developed a passion for capturing and creating beauty from the urban landscape while growing up in Seoul where remnants of rapid industrialization are plentiful. Studying landscape architecture from the University of Minnesota and Harvard Graduate School of Design, Juhyuk’s interest expanded into exploring the potential of landscape as a medium promoting reconciliation of social, environmental and geopolitical issues. His design approach seeks to challenge the dichotomies between city and nature by reconciling the boundary between them.

Harvard Graduate School of Design, Master of Landscape Architecture, 2019
University of Minnesota, Bachelor of Environmental Design, 2016