Landscape Designers

Jeff Findley
Landscape Design/Sales

Marta Carlson
Landscape Design/Sales

Bill Siewert
Landscape Design/Sales

Timothy Trimmer
Landscape Production Manager

Susan Renna
Landscape Buyer
Over the past three decades, Professional Grounds, Inc. has acquired some of the most experience and specialized professionals in the industry. We are confident that when we send a member of our team whether it’s a Landscape Designer, Certified Horticulturist, or a foreman and his crew to a client’s property that they will provide quality service and carry themselves with the highest level of professionalism.
Jeff Findley
Education: George Washington University
Pursuing Master's of Landscape Design
Lawrence Technological University
Bachelor of Science-Architecture
Oakland Community College
Landscape Technology
Certifications: Certified Landscape Technician
(Exterior)-Hardscape Installation,
Softscape Installation
International Concrete Paver Institute
(ICPI)-Level 1 Paver Installer Certified
Cast Lighting-Certified Low Voltage
Lighting Installer
Unique Lighting University-Certified
Low Voltage Lighting Installer
Jeff was transplanted from the Midwest to Virginia and brings with him over 17 years of experience in the landscape industry. Once himself a crew member, he progressed to a landscape Foremen/Project Manager, followed by five years as owner and designer of a landscape design/build firm. As a previous owner of a landscape business in the Midwest, Jeff was able to understand the importance of industry knowledge and experience; thus gaining several certifications, such as the Certified Landscape Technician (CLT) with an emphasis on exterior installations. Jeff’s work has been published in Metro Washington Home Improvement magazine and also as a category winner in the Navastone Before & After Contest. His passion is for the creatively complicated sites combined with the contextual aesthetic of the surrounding area. He has been praised for his creative approach towards his projects whether it’s his designs or ability to work with challenging landscapes. His customers have always appreciated his honesty and his level of dedication, which has proven him to be a leader among our designers.
Marta Carlson
Education: Ohio State University
Associates Degree-General Science/
Greenhouse Management
Kent State University
Associates Degree-Business
Administration
Catawba Valley Community College
Continued Education-Landscape Design
Certifications: NC Landscape Contractor
NC Professional Plant Specialist
NC Commercial Pest Applicator
Master Gardener
Marta brings with her over 23 years of experience in the landscaping industry ranging from nursery growing, production, retail, sales, design and installation. For 11 of those years Marta owned and operated a retail garden center and landscape design and installation business providing her with a background in business as well. She has a passion for design and easily visualizes her clients’ dreams and desires then brings them to reality. From site planning to furniture placement, Marta will become involved with every aspect of the client’s project insuring proper flow and comfort while making the construction process a delightful experience. Her project creations can range from traditional to tropical, while appropriately incorporating hardscapes, water features and plantscapes. Marta’s passion, enthusiasm and motivation have allowed her to design beautiful and functional landscapes while developing strong relationships with her clients.
Bill Siewert
Education: Northern Virginia Community College
Landscape Designer/Horticulturist
Certifications: International Concrete Paver Institute
(ICPI)-Level 1 Paver Installer Certified
Turf & Grounds Maintenance
Virginia Class A Licensed Contractor
Awards: Six-time Design Award Winner-
Washington National Flower & Garden Show
Bill has been in the landscaping industry since 1983, and owned his own landscaping business for 20 years. One of Bill's first job's in the industry was as a foreman at Professional Grounds, where he was recognized as an employee with a great amount of potential. Born and raised in Springfield, Virginia, Bill understands the unique landscape demands of the Northern Virginia Area. With his extensive knowledge in the field of construction, Bill is able to turn landscaping problems into unique landscaping solutions that are both functional and esthetically pleasing. Bill stays abreast of the latest techniques and products through his participation in industry seminars and continuing education.
Timothy Trimmer
Education: Elon University
Bachelor of Science-
Business Administration
Timothy, a second generation family member, has worked for Professional Grounds on a full-time basis since 2003. Once a crew member himself, Timothy has experience in all facets of the actual day to day operations. His working knowledge and practical hands-on experience in the field helps our customers make informed decisions to ensure the beautification of their property. Tim’s major responsibilities include overseeing Landscape Production and Enhancements Sales, and he responsible for job cost accounting for all landscape projects. Timothy’s interest and enthusiasm coupled with practical experience and formal education has proven to benefit our customers and our team at Professional Grounds, and will do so for years to come.
Susan Renna
Certifications: Certified Master Gardener
Since 2008, Susan has been working directly with growers, manufacturers and the nursery industry to acquire the best plant material available for installation and maintenance by Professional Grounds, Inc. Susan provides expert advice, service and education regarding shrub and plant varieties and proper planting and care to our clients and crews. She insures high quality selection, transportation, installation and care of all plant products. Susan served as the Coordinator for the Fairfax County Master Gardner Program, supporting one of the largest Master Gardener Organizations in the U.S. Her knowledge of horticulture and care of plants allows Professional Grounds to offer educational seminars for our clients year round.