Oona Johnsen is a licensed landscape architect in Florida and California with 19 years of experience in the field of landscape architecture. A leader in promoting sustainable and ecological approaches to site and landscape design, her specialties include LEED projects, public projects, low impact development strategies, and projects that incorporate stakeholder and/or community input during the design process.

Expertise and past project settings include site improvements and phased planning efforts for military communities, institutional and school campuses, and public settings which include complete streets/public realm revitalization, plazas/courtyards, hardy planting in difficult site settings/structural soils, and playground design. Additionally, Oona has designed artful and intimate spaces for residential, hotel, and resort settings. Attention to how the space will be used and maintained is important research and leads to project success.

Oona is a proficient project manager and can organize support staff efficiently, whether in-house or virtually across state lines. She believes in direct and continuous communication with clients, sub-consultants, and internal staff to keep projects moving smoothly, on time and on budget. She is consistently told she is a pleasure to work with, which gives her repeat work with clients.

Oona can take a project from predesign, to concept phase, then schematic/design development. She also leads the detailed creation of construction documents: plans, details, and specifications, which then lead to the development of permit and bid documents. Furthermore, Oona is skilled at the construction administration of the project, maintaining quality, consistency where needed, and solving construction issues in a timely manner.


  • Registered/Licensed Landscape Architect: California #5726
  • Registered/Licensed Landscape Architect: Florida LA6667387
  • ARCSA AP: Accredited Professional, American Rainwater Catchment System Association (ARCSA)
  • LEED AP: Leadership in Energy and Environmental Design (LEED) Accredited Professional, U.S. Green Building Council (USGBC)/li>
  • Member, American Society of Landscape Architects (ASLA)

Bachelor of Science in Landscape Architecture,
University of Washington, Seattle


  • Fulbright Scholarship, 2004 - 2005
  • Outstanding Achievement Award, ASLA, Maple Valley Library
  • Merit Award, Washington State ASLA, Swedish Hospital Rooftop Garden Design
  • Merit Award, Washington State ASLA, Research Paper: The Restoration of a Forest Ecosystem to Recreate Second Growth with Old-Growth Characteristics and Aesthetic Qualities
  • Faculty Award, UW Landscape Architec ture Department
  • Madison Street Park: Hillsborough County Planning Commission, Award of Excellence in Entertainment & Redevelopment Categories, October 2020
  • Met West Office Building 3: National Association of Industrial and Office Parks (NAIOP), Best Office Project Award, January 2020
Works Cited
  • Contemporary Slovenian Timber Architecture for Sustainability, Kuzman, Manja & Kutnar, Andreja: Springer International Publishing, 2014: 133-134
  • Landscape Architecture Magazine, County Seat, Hinshaw, Mark, January 2007: 44-51
  • Landscape Architecture Magazine, Governing Green, Calkins, Meg, February 2002: 34
  • Landscape Architecture Magazine, Reading the Wilderness, Enlow, Clair, January 2003: 42
  • Civic Builders, Fentress, Curtis W, England: Wiley-Academy, 2002: 196- 205.
  • Landscape Architecture Magazine, Fountains: Some Guidelines, MacElroy W., Winterbottom D., June 2001: 44
  • Advisory Committee, Florida Friendly Landscaping (FFL) 2018-Present
  • Tampa Downtown Partnership, Urban Design Committee Member 2020-Present
  • Accredited Professional & Member, American Rainwater Catchment Systems Association
  • Member, Tampa Bay Section, American Society of Landscape Architects (Florida)
  • Member, Florida Native Plant Society, Suncoast Chapter
  • Accredited Professional & Member, United States Green Building Council, Tampa Bay Branch
  • Member, Preserve the Berg, St Petersburg
Speaking Events
  • Residential Rain Gardens, Learn how to build rain gardens and why they are beneficial to Pacific Grove. Community Lecture for Pacific Grove, April 22, 2015
  • Hartnell College, Introduction to Stainability 101, Guest lecterer, What is Landscape Architecture, LEED, & Low Impact Development, September 29, 2014, professor Jordan Daniels.
  • AIA Monterey Bay monthly program lecture: LID! A Re-Introduction to Low Impact Development, Local Examples, and Local Rebate Programs, September 25, 2014, 5:30-7:30.
  • The Neal and Larry Show 101.1 FM Radio: Dedicated to the promotion of Self Sufficiency in Architecture, Community, and the Individual; September 6, Saturday 1:00pm; Oona Johnsen, a registered landscape Architect in California, will be joining us to discuss the universe of landscaping, with particular emphasis on water, and how it all relates to Self-Sufficiency in a changing world of drought and dwindling resources. Join us to learn new ways to collect, store and utilize the water resources on your personal piece of land.
  • Moving Stormwater Through Paving, Pervious Pavements for Residential Applications, Learn how pervious pavement systems work, why they are important, including examples of various designs, products, and construction techniques. Community Lecture for Pacific Grove, June 27, 2014
  • Sustainable Business Practices, Save Money and Increase Exposure, Co-Speaker with Gabby Carbajal, Monterey Health Department and Abbie Beane, The Offset Project; Sustainable Pacific Grove, June 11, 2014
  • Monterey Peninsula Water Management District: Rainwater Harvesting Workshop, Co-Speaker with Jon Ramsey, Aqua Soleil, May 10, 2014, Monterey
  • Raindrop in a Watershed: Cleaning Monterey Bay One Watershed at a Time, Learn about sustainable stormwater management practices and the upcoming RainScapes rebate program for homeowners and businesses, Community Lecture for Pacific Grove, March 2014
  • Low Impact Development & Green Infrastructure, Co-Speaker with Doug Dowden, MRSWMP Program Manager ,Sustainable Pacific Grove, September 2013
  • University of California Santa Cruz, Panelist for the class titled: Green Building, Topic: Green Building Professionals, Professor: Karsten Mueller, Ph.D., April 2012
  • A Child’s Introduction to Native Plants, Bayview Elementary School, Monterey Penninsula Unified School District, Monterey, CA, May 2011. Topic: An interactive discussion with two Kindergarten classes about native plants including hands on approach to learning about particular native plants by touch, smell, and dissection as well as their association with butterfly larvae, bees, and hummingbirds.
  • Dune & Shoreline Ecology, United States Green Building Council (USGBC) Faculty Retreat, Asilomar Conference Grounds, Pacific Grove, CA, August 14 and 15, 2010 Topic (day 1): A guided walk to USGBC Faculty explaining the surrounding dune and shore- line ecology; explanation of historical context, local weather conditions, sand dune formation, restoration techniques, native plant communities, and local habitat, as well as explaining issues of dune habitat fragmentation and the threats of invasive plant species coupled with current development trends. Topic (day 2): A guided walk to USGBC Faculty with a more detailed look at the surrounding dune and shoreline ecology; explanations the symbiotic relationships of certain plants, how particular plant and animal species have adapted to the dune and shoreline environment, as well as discussing problems and constraints to site and landscape design and restoration efforts in the LEED rating system.
  • A Child’s Introduction to Native Plants, Creative Children’s Learning Center Daycare, (Part of the Knowledge Learning Corporation and Accredited by the National Association for the Education of Young Children), Monterey Presidio, CA August 3, 2010 Topic: An interactive discussion to 4 year olds about what native plants are including hands on approach to learning about particular native plants by touch, smell, and dissection.
  • Bees: Fact, Fiction, and Pollination, Rana Creek Nursery, Carmel Valley, CA August 7, 2010 Topic: Discussion and display of California native plant species that support pollinators such as bees and how to integrate these plants into home gardens. Co-presenter, Doug Westpal, hobby beekeeper.
  • LEED / Green Building, American Public Works Association Monterey Bay Chapter Summer Training Conference, Salinas Community Center, Salinas, CA July 22, 2009 Topic: Discussion of new LEED version 3.0 system and how it applies to public works and how it is changing traditional design and construction practices. This topic was focused by addressing parking lot design options.