Paving The Path Forward

The leaders of Mowbrays’ believe in nurturing and promoting the future leaders of MTS. By promoting our best and brightest, we feel the future of our company is in good hands.

Our team is passionate about our safety practices and the work that we perform. Together, our team is helping keep the community safe. Interested in learning more about our services? Contact us today to find out how we can meet your needs.

Robin Mowbray

Mowbray’s Tree Service Owner

With the passing of Gloria Mowbray in 2021, Robin Mowbray, the youngest daughter of John and Gloria Mowbray, is now the leader of Mowbray’s Tree Service. Robin started her career with MTS in 1993 working as an administrator, then transitioned into Payroll, and finally Human Resources. During that time she also worked with insurance companies, employee unions, and compliance. During her tenure MTS has grown from approximately 100 employees, to over 1,500 full time employees. Robin’s strength is her ability to listen to and have compassion for her Mowbray’s Tree Service family or, as other owners may label them, her employees.


  • Provide support for all MTS Departments
  • Provide strategic counsel and maintain focus on MTS as a woman owned business – WBE
  • Support her family as they continue to guide MTS into a bright future in the Vegetation Management Industry.


  • 20+ years of applied multi-utility tree service administration.
  • 10+ years as corporate executive.

Richard John Mowbray

Mowbray’s Tree Service President/CEO

Richard Mowbray, grandson to John and Gloria Mowbray, is the third generation of the Mowbray family to lead Mowbray’s Tree Service. Richard started his career in the Utility Vegetation Management (UVM) industry in 2005 as a groundman, and worked his way up to CEO. He has worked just about every position within Mowbray’s including crew foreman, hazardous tree removal specialist, crane operator and, in 2019, Corporate Safety director. 

During this time Richard has worked with utility companies in California and Arizona performing vegetation management and also the various wildfire projects throughout California. These utilities include the following:

  • Southern California Edison (SCE)
  • Pacific Gas and Electric (PG&E)
  • Sacramento Municipal Utility District (SMUD)
  • Arizona Public Service (APS)
  • Pacific Power and Light (PPL)
  • Add Bear Valley Electric Service (BVES)


  • Provide support for client and regulatory interface.
  • Ensure the operating units within MTS have the required support and guidance to continue to drive MTS to “Best in Class”.


  •  ISA Certified Arborist
  • ISA Qualified Tree Risk Assessor
  • TCIA Certified Tree Safety Professional
  • CA Contractors License C61/D49
  • NCCCO Certified Crane Operator
  • Licensed Timber Operator

Mike Bartelli

Mowbray’s Tree Service Sr. Vice President of Operations

Michael Bartelli is a seasoned industry professional and Certified Arborist with over 25 years of experience in Utility Vegetation Management. He joined the Mowbray team in 1991 and has been actively involved in the operations of Utility Vegetation Management as a General Foreman, General Manager, Project Manager, Area Manager, and most recently as the Sr. Vice President of Operations. During his tenure at Mowbray’s, Michael Bartelli has conducted and supervised vegetation management for utility companies to include:

  • Southern California Edison (SCE)
  • Pacific Gas and Electric (PG&E)
  • Arizona Public Services (APS)
  • Duke Energy
  • PacifiCorp


As the Sr. VP of Operations, Michael Bartelli oversees the day-to-day operations of the company, defines and implements operation strategies, structures, and processes. He is also responsible for managing the quarterly and annual budget process, and monitor performance to proactively identify efficiency issues and propose solutions.

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686 E Mill St.
San Bernardino, CA 92408

Call Us

(909) 389-0077