Tree Service Estimator — Certified Arborist
Full-Time | Modesto, CA 

About the Role
Grover Landscape Services is seeking a Tree Service Estimator with an ISA Certified Arborist credential to lead estimating and customer-facing technical work for our Tree Care Division.
This role applies your arboricultural expertise every day — walking properties, diagnosing tree conditions, scoping projects, and preparing professional estimates for commercial and residential customers. You will work alongside our Tree Division Manager and report to company leadership.
This role includes a transition period working directly with our retiring sales arborist to ensure a thorough handoff of relationships and account history.
This position is ideal for someone who wants to apply their tree care expertise in a customer-facing role with a stable, family-owned company that values quality workmanship and honest advice.

About Us
Grover Landscape Services is a commercial landscape and tree service company headquartered in Modesto, California. We take pride in long-tenured employees, quality workmanship, and treating customers and employees with integrity and respect.

Key Responsibilities

• Walk commercial and residential properties to assess tree conditions and scope work
• Prepare detailed, accurate estimates for pruning, removals, plant health care, and related tree services
• Provide expert tree care advice to customers grounded in current arboricultural best practices
• Document site conditions, tree inventories, and work specifications using company software
• Follow up on open estimates to answer questions, refine scope, and close sales
• Coordinate with Tree Division crews to ensure scopes are accurate, achievable, and well executed
• Maintain ongoing relationships with property managers, HOAs, municipalities, and commercial clients
• Support the Tree Division Manager on technical assessments and complex projects

Qualifications

• ISA Certified Arborist credential, current
• 3+ years of hands-on tree care experience (climbing, ground operations, or estimating)
• Working knowledge of California landscape and native tree species
• Strong customer communication skills with the ability to explain technical work clearly
• Detail-oriented and organized — capable of producing accurate, professional estimates
• Proficient with computers, mobile devices, and CRM/estimating software
• Valid California driver's license with clean record

Work Environment

• Field-based with regular time at our Modesto headquarters
• Company vehicle, phone, and laptop provided
• Standard business hours with occasional after-hours customer follow-up
• Collaborative and team-oriented environment in a stable, family-owned company

Compensation and Benefits
We offer a competitive salary commensurate with experience and qualifications. Our comprehensive benefits package includes:

• Medical Insurance
• Dental Insurance
• Paid Time Off (PTO)
• 401(k) with company match
• Profit Sharing
• Company Vehicle
• Paid Professional Development and Continuing Education

ADVERTISED PAY RANGE 85K–110K

CLICK HERE to Apply online:

Salary $7,113.60 - $8,593.95 Monthly ($85,363.20 - $103,127.40 Annually)
BENEFIT INFORMATION CLICK HERE
(3% Negotiated Salary Increase effective 7/1/2026)

The City of Claremont is looking for a highly motivated, self-starter with excellent customer service skills to manage, plan, direct, organize, and supervise horticulture and landscape maintenance.

The Landscape Maintenance Supervisor is dedicated to maintaining and improving the beauty, safety, and sustainability of our community. They oversee landscape and tree maintenance operations, manage staff and contractors, and help shape the future of the City's Urban Forest and water-efficient landscaping programs.

Would you like:

• To make a visible impact on the community? 
• Lead meaningful environmental and sustainability initiatives? 
• Manage exciting capital improvement projects? 
• Work alongside a dedicated Maintenance & Operations team? 
• Grow your career in municipal landscape and urban forestry management?

SUPPLEMENTAL RECRUITMENT INFORMATION
APPLY CLICK HERE

Candidate applications will be screened for minimum qualifications as well as against the pool of qualified applicants who apply.   Successful candidates will be invited to attend a panel interview. Dates for recruitment processes are subject to change.   Recruitment may close after a sufficient number of qualified applicants are received.  All candidates will be notified of their standing in the recruitment process via email.  

OPEN DATE: June 16, 2026
CLOSE DATE: July 8, 2026
PANEL INTERVIEW: July 22, 2026

The Position
The Landscape Maintenance Supervisor has primary responsibility of monitoring, coordinating, and inspecting the work of contractors engaged in the maintenance and construction of City-owned landscaped areas, such as parks, playgrounds, median islands, cemetery grounds, or other public right-of-way, and the landscape adjacent to City buildings and facilities. 

The Landscape Maintenance Supervisor will:

• Supervise landscape maintenance crews and contracted service providers 
• Oversee parks, athletic fields, landscaped areas, irrigation systems, and tree  maintenance programs 
• Administer the City's Urban Forest Program 
• Manage Weed Abatement and Brush Clearance programs 
• Assist with budget preparation and contract administration 
• Develop policies, procedures, and employee training programs 
• Ensure compliance with safety standards and maintenance specifications
• Respond to service requests and emergency situations 

The Landscape Maintenance Supervisor will supervise lower-level staff and provide technical direction. Work hours are generally Monday through Thursday (38-hour work week) between 6:30 a.m. and 4:30 p.m. The Landscape Maintenance Supervisor will attend Commission and Committee meetings in the evenings, and other evening/weekend meetings or special events as required.

Ideal Candidate
We are looking for someone who has:

• Strong supervisory and team-building skills.
• Extensive knowledge of horticulture, arboriculture, and landscape maintenance.
• Experience with irrigation systems, controllers, and water conservation practices.
• Contract administration and project management experience
• Excellent written and verbal communication skills.
• A commitment to safety, customer service, and operational excellence.
• The ability to inspire staff and foster high performance.

Experience:
Four or more years of increasingly responsible maintenance, landscape, tree, and/or contract administration work, which included at least two years of responsible supervisory experience.
Three or more years of experience as a Certified Arborist from the International Society of Arboriculture. 

Education:
Two years of vocational or college-level training with an emphasis in urban horticulture, landscape maintenance, arboriculture, or a related field.  A Bachelor's Degree is desirable.

License or Certificate:
Required at time of hire:

• Valid California Class C Drivers’ License and good driver record are required.  
• Arborist Certification from the International Society of Arboriculture is required at time of hire. 

Desirable:

• Municipal Specialist from the International Society of Arboriculture is desirable. 
• Tree Risk Assessment Qualification (ISA TRAQ) is desirable. 

Required within first year of employment:

• Qualified Applicator Certificate required within six months of employment.   
• TRAQ credential required within twelve months of employment.
• Certified Playground Safety Inspector (CPSI) certificate may be required after hire as determined necessary by the Community Services Director.  If so decided, incumbents will be notified and provided adequate notice to complete.

To view the complete job description HERE

Additional Information
REASONABLE ACCOMMODATION: The City of Claremont is committed to providing reasonable accommodation to applicants as required by the Americans with Disabilities Act (ADA) and Fair Employment and Housing Act (FEHA). Individuals with qualified disabilities who need reasonable accommodation during the selection process or in the performance of their duties must specify the accommodations needed, in writing, at the time when the employment application is submitted.

EQUAL OPPORTUNITY EMPLOYER: The City of Claremont is an Equal Opportunity Employer, committed to supporting Diversity, Equity, and Inclusion initiatives to build and sustain an environment that values diversity, welcomes opportunities to engage and understand others, and fosters a sense of belonging.

Website: http://www.claremontca.gov

JOB TYPE: Full Time0
DEPARTMENT: Parks
SALARY: $6,645.00 - $8,639.00 Monthly
CLOSING DATE: 6/30/2026 11:59 PM Pacific
LOCATION: Whittier, CA
JOB NUMBER: 2026-023
OPENING DATE 05/22/2026
MAX NUMBER OF APPLICANTS: 150

Description
WILL CLOSE AFTER 150 COMPLETED APPLICATIONS OR JUNE 12, 2026, WHICHEVER OCCURS FIRST.

DEFINITION:
Under direction, directs, coordinates, and supervises the activities and operations of the maintenance and care of City street and park trees; supervises the weed abatement program; implements maintenance policies and procedures; outlines, assigns, and determines work projects; ensures safe work practices; performs other related duties as required.

DISTINGUISHING CHARACTERISTICS:
The Tree Maintenance Supervisor is the supervisory level classification responsible for overseeing the Tree Maintenance Division.  The incumbent is responsible for planning and scheduling staff assignments and monitoring work production.  This class serves as supervisor for related tree planting, maintenance, trimming, and care of City street and park trees and weed abatement, inspecting, evaluating, and approving completion of assignments by tree crews.  This classification is distinguished from the next higher classification of Park Manager in that the latter has overall responsibility for the administration and management of all park and tree maintenance operations. 

SUPERVISION RECEIVED/EXERCISED:
Receives direction from the Park Manager.  Exercises direct and indirect supervision over assigned staff

Examples of Duties
ESSENTIAL FUNCTIONS: (include but are not limited to the following)

• Supervises, inspects, and participates in the work of crews engaged in the assigned tree program, including tree planting, maintenance, trimming, and care of City street and park trees; supervises the weed abatement program; outlines unusual work assignments and special projects according to general instructions; coordinates and provides liaison to contractors; inspects completed work.
• Participates in the development and implementation of goals, objectives, policies, and procedures; evaluates work methods and procedures for improving Division performance and meeting goals; ensures that goals are achieved; forecasts the needs and resources of the Tree Division; assists in assessing current and long-range goals and objectives.
• Participates in the selection and training of Tree Division personnel; assumes responsibility for motivating and
  evaluating assigned personnel; provides or arranges for necessary training; initiates discipline procedures as is
  appropriate.
• Participates in the development of and monitors the Tree Division budget; prepares reports; oversees and
  maintains the inventory, maintenance, and operating condition of departmental tools, equipment, and supplies;
  requisitions and orders needed materials, parts, and equipment.
  Determines work assignments and utilization of personnel, equipment, and materials; recommends equipment and supplies; purchases materials and supplies as required; maintains a variety of records.
• Prepares and administers contracts for tree trimming services; prepares bid specifications for contract services; ensures that services are performed in keeping with contract provisions.
• Evaluates service needs, equipment, work methods, and operations; evaluates maintenance procedures, and
  services to determine effectiveness; recommends changes to increase effectiveness to meet departmental
  objectives.
• Receives and investigates service requests; determines and ensures appropriate disposition; investigates and
  reports on matters related to claims made against the City.
• Evaluates and recommends work projects and activities; estimates time, materials and equipment necessary for successful completion of work; identifies and reviews resource needs with appropriate management staff;
  allocates resources accordingly.
• Establishes positive working relationships with representatives of community organizations, State/ local agencies and associations, City management and staff, and the public.

OTHER DUTIES: (include but are not limited to the following)

• Assists other Parks and Public Works divisions when required.
• Answers emergency calls from the public and other agencies taking appropriate action.
• May be exposed to confidential and privileged information during the course of duties, which should be maintained as such.
• Performs other related duties as required

Click Here to view full job description.

The Position
THIS CLASSIFICATION IS SCHEDULED TO RECEIVE 4% SALARY INCREASE EFFECTIVE JULY 1, 2026. 
OPEN EXAMINATION - ONE YEAR PROBATIONARY PERIOD

Under the direction of the Assistant Director of Public Works, this mid-management position supervises an urban
forestry management program designed to optimize the health, beauty and safety of parkway trees for the public
through proper planning, planting, maintenance and care.

Essential functions of the job include, but are not limited to, the following:
Ensures Department services are provided with exceptional customer service and the highest level of ethical standards.  

Plans, organizes, trains, directs and evaluates the work of personnel engaged in the planting, care and related
maintenance activities required to nurture and maintain a healthy and thriving urban forest.  Reviews and evaluates
employees' job performance and effectively recommends personnel action.

Plans, develops, institutes and evaluates programs related to the urban forestry management program.  Reviews
proposed development plans and records to evaluate parkway tree planting proposals in relationship to departmental
policies, City ordinances and regulations.  

Handles unusual or difficult citizen complaints, checks time and materials expended and prepares reports.  Prepares and submits budget reports anticipating equipment, materials and personnel needs.  Maintains appropriate records and develops policies related to the urban forestry program.

Manages tree maintenance contracts.  Reviews tree removal and planting permits for approval recommendation.
Interacts with other City departments in the development of tree related projects.

May assume responsibilities of Assistant Director of Public Works in his/her absence.

May have the opportunity to participate in related divisional cross-training efforts. Experience and qualifications gained
in this cross training may apply towards promotional opportunities and transfers.

Assumes responsibility for ensuring the duties of this position are performed in a safe, efficient manner.

Performs other related duties as assigned or as the situation requires.

Minimum Requirements
An equivalent combination of experience and education sufficient to perform the essential job functions and provide the required knowledge and abilities is qualifying.

Experience
Four years experience in the direction and supervision of tree planting, maintenance and removal operations.

Education/Training
Bachelor's Degree in forestry, horticulture or a related field.

License(s)/Certification(s)
Valid California Class C driver's license.
Possession and maintenance of "Certified Arborist" designation with the International Society of Arboriculture.

Knowledge, Skills & Abilities
Knowledge of:
Commonly used software programs such as MS Word and Excel.
Methods, equipment, tools and safety practices of tree planting, maintenance and removal.
Principles and practices of modern arboriculture of forestry used in park and street tree programs.

Skill in:
Use of a personal computer.

Ability to:

• Provide exceptional customer service to all employees and vendors.
• Deal courteously and tactfully with the public.
• Develop necessary skills from on-the-job training and meet standards of performance for the classification by the end of the probationary period.
• Effectively supervise subordinates.
• Establish and maintain effective working relationships with subordinates, other employees and the general public.
• Foster a teamwork environment.
• Model and practice the highest standards of ethical conduct.
• Plan and prioritize assignments.
• Read, write and comprehend directions in English.
• Review and evaluate employees' job performance.

Other Characteristics
Willingness to:
Works necessary hours and times to accomplish goals, objectives and required tasks in a timely manner.  
Initiate, recommend, and carry out personnel actions.
Assume responsibility for maintaining a safe working environment.
Initiate, recommend and carry out personnel actions.

Click Here for more information

Job Title: Board Certified Master Arborist

Location
West Sacramento, CA, 95691 Hybrid
Other Location

Description
PER DIEM 7 DAYS PER WEEK & HIRING BONUS AVAILABLE
** ISA BOARD CERTIFIED MASTER ARBORIST CERTIFICATION REQUIRED **
OMS Field Services is looking for Master Arborists to work in our clients Vegetation Management program. This position will be responsible for managing and maintaining trees and other vegetation in a safe, healthy, and aesthetically pleasing manner in accordance with client policy and compliance. Master Arborists will work closely with client and diagnosing and treating tree diseases, pests and provide advice on tree care and management. Business conduct must occur in accordance with OMS policies and procedures and be aligned with the goals of OMS and our client.

Essential Functions:

• Conducting individual tree evaluations and tree risk assessments.
• Evaluating project data, development site plans, and other project-related technical reports.
• Collecting field data utilizing field computers, tablets, and global positioning system (GPS) units.
• Processing and analyzing field-collected data.
• Analyzing data and conducting project-related research.
• Preparing arborist reports and other technical reports related to tree and urban forest management.
• Developing written tree management recommendations.
• Presenting findings to decision-making bodies, project teams, and industry groups.
• Preparing proposals, project scopes, and budgets.
• Working collaboratively with project planners, engineers, biologists, GIS staff, and other resource specialists.
• Other duties as assigned by OMS or the client.

Qualifications:

• Certification as an International Society of Arboriculture (ISA) Certified Master Arborist with Tree Risk
• Assessment Qualification (TRAQ) required.
• Bachelor’s degree in forestry, natural resources, environmental science, or other related field is desired but not mandatory.
• Required to maintain a Class C driver’s license, including participating in Employer Pull Notice Program (EPN), with DMV.
• Must have clean driving record.
• A proven track record of business development success.
• Additional desired qualifications include excellent writing skills, project management and client, development experience, and experience with GIS, GPS, plant/tree identification, and arboricultural and vegetation management practices.
• Conduct a background check, clear drug screening, and physical exam.
• Approval by Client Representative.

Working Conditions:
Environmental Factors: Indoor and outdoor conditions; exposure to heat, cold, potentially hazardous chemicals, toxic materials; work on/walk on slippery or uneven and potentially mountainous terrain. Noise level is usually moderate. Physical Demands: The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. While performing the duties of this job, the employee is regularly required to use hands to finger, handle, or feel objects, tools, or controls. The employee frequently is required to stoop, bend, kneel, crouch, talk, hear, stand, walk for extended periods of time, walk long distances, sit during extended periods of time, and reach with hands and arms. The employee must occasionally lift, push, pull, and/or move up to 25 pounds. Specific vision abilities required by this job include close vision, distance vision, color vision, peripheral vision, depth perception, and the ability to adjust focus. Ability to perform tasks during a typical 8+ hour workday.

Benefits:

• 401(k)
• Health insurance
• Dental insurance
• Vision insurance
• Life insurance
• Paid time off
• Employee assistance program
• Employee discount
• Flexible spending account
• Health savings account
• Referral program
• Vehicle stipend
• Per Diem 
• Hiring Bonus

Job Type: Full-time, Temporary
License/Certification:

• ISA Board Certified Master Arborist certificate (Required)

Pay Range
$35.47   Hourly to $50.00   Hourly

Contact information:
Jena Lemont 
925-220-4298
jena.lamont@omsgroupllc.com

Click Here to learn more.