About Us

- Landmark Service Group -

Think Safety – Service – Quality – Exceptional – Trusted – Proven – Reputation

Who we are

  • Landmark Outdoor Services, LLC – 30th year in the Green Industry
  • Family Owned and Operated since 1989
  • Landmark Operations are located at 10901 East 11th Street in Tulsa…central to Tulsa and the surrounding area. We are just a matter of minutes from anywhere in Broken Arrow, Jenks, Bixby, Glenpool, Owasso, Sapulpa, Sand Springs, Claremore, Catoosa, etc.
  • Currently provide Comprehensive Grounds Management services to numerous, commercial properties throughout the Greater Tulsa Metro area
  • Landmark has crews dedicated and trained to service Small, Medium and Large Commercial Properties. In addition, we have a Residential Division that is specifically trained and equipped to maintain residential lawns.

Landmark is a family owned, locally operated, full-service grounds maintenance company with our beginning dating back to 1989.

  • We exist to serve the grounds maintenance and landscaping needs of our clients.
  • We believe in building long-term client relationships by providing the highest level of comprehensive grounds maintenance service that value and performance based.
  • Our number one focus is on the quality of our work done by every employee, for every customer, every property, every service , everyday.
  • We always emphasize Quality over Quantity.
  • Client satisfaction is not a part of our business…. IT IS OUR BUSINESS.

Our Core Values….

They are the values that guide and frame how we live and work.  They are what define Landmark, and are the roadmap by which we guide our business.  We are convinced that without them we would not be whom and what we strive to be.

Our benchmarks are to:

  • Always be trustworthy and fair in all of our dealings
  • Always conduct ourselves in a professional manner
  • Always expect high job performance standards
  • Always be dependable, reliable and accountable
  • Always work as a TEAM member
  • Always treat everyone with great respect, honesty, and integrity
  • Always make sure that the value we provide exceeds the cost
  • Always strive to be the very BEST in our industry
  • Always Exceed our client’s Expectations


  • Founded in 1989
  • T.E.R.O. Certified
  • 2 Degreed Horticulturalists on Staff (Oklahoma State University)
  • Licensed Landscape Architect (Oklahoma State University – 1981)
  • 8 Licensed Pesticide Applicators on Staff
  • Fully Insured (General Liability – Worker’s Compensation – Fleet)
  • Completed numerous seminars and schools regarding turf and landscape management
  • We have a staff of over 100 highly trained, dedicated field employees and 5 full time office employees at your service