26/27 Substitute Custodian

Mercer Island School District 400; Mercer Island (WA); On-site; USD 28,000 - 40,000; Part time

Job summary

Mercer Island School District 400 is seeking a Substitute Custodian on Mercer Island, WA. The role provides safe and healthy facilities for students, staff and community members, performing cleaning tasks and basic maintenance to keep buildings ready for use.

Starting immediately, the position requires a High School diploma or GED and a valid Washington State Driver’s License. Pay is $24.78 per hour for substitute duties, with hours varying by school needs.

Qualifications

• High school diploma or GED.
• Custodial experience preferred.
• Knowledge of custodial tools and cleaning procedures.
• Must have a valid Washington State Driver’s License.

Responsibilities

• Sweep, mop, wash and vacuum floors, and polish with a buffing machine.
• Wash walls, ceilings and interior windows; wash outside windows when needed.
• Gather and dispose of trash and wash waste containers.
• Wash sinks and maintain plumbing fixtures; restock soap and paper products.
• Assist in repairs and moving equipment; assist with staging scaffolding.
• Prepare cleaning supplies and equipment as needed.
• Duties directly related to the job.

Skills

Communication skills

Interpersonal skills

Driver's license

Education

High school diploma or GED

Job description

Mercer Island School District 400 Maintenance & Operations - Mercer Island, Washington Open in Google Maps

26/27 Substitute Custodian

Mercer Island School District 400 Maintenance & Operations - Mercer Island, Washington Open in Google Maps

This job is also posted in Mercer Island School District

Job Details

Job ID: 5958468
Application Deadline: Posted until filled
Posted: Oct 13, 2026 7:00 AM (UTC)

Starting Date: Immediately

Job Description

POSITION SUMMARY

Provide students, staff and community members with facilities which are safe and healthy.

ESSENTIAL FUNCTIONS

This list of essential functions is not exhaustive and may be supplemented as necessary in consultation with the employee(s) involved.

• Sweep, mop, wet-wash and vacuum floors. Polish floors using a buffing machine.
• Wash walls, ceilings and inside windows by hand. May wash outside windows.
• Gather and dispose of trash, wash wastebaskets and large refuse containers.
• Wash sinks and other plumbing fixtures, replace disposable products, such as toilet paper and paper towels, and soap.
• Assist in repair to building, grounds and equipment.
• Assist in moving equipment and in erecting staging scaffolding.
• Assemble cleaning supplies and equipment needed for the performance of above tasks.
• Duties directly related to purpose of job

QUALIFICATION REQUIREMENTS

To perform this job successfully, an individual must be able to perform each essential duty satisfactorily. The requirements listed below are representative of the knowledge, skill, and/or ability required. Reasonable accommodation may be made to enable individuals with disabilities to perform the essential functions.

Education/Experience/Qualifications

• High school diploma or GED.
• Previous work experience or training as a custodian preferred.
• Knowledge of the use and care of common maintenance and custodial tools, materials, and equipment.
• Must have strong communication and interpersonal skills.
• Ability to establish and maintain effective working conditions with students, staff and the community.
• Must possess a valid Washington State Driver’s License.

Position Type: Substitute
Salary: $24.78 to $24.78 Per Hour
Job Categories:

Support Staff > Custodian

Contact Information

• Human Resources
• Central Office HR
• Email: [e-mail]