Administrative Assistant – Power Dept, San Marcos

Diamond Fence Co.; San Marcos (CA); On-site; USD 25,000 - 36,000; Full time

Benefits offered by this job

401(k)

Dental insurance

Health insurance

Life insurance

Paid time off

Professional development assistance

Tuition reimbursement

Vision insurance

Job summary

Diamond Environmental Services is seeking an Administrative Assistant for the Power Dept in San Marcos, CA. You will support the Outside Sales Representative, organizing projects from kickoff through billing and closeout.

The role emphasizes proactive communication, meticulous record keeping, and on-time delivery of milestones. Ideal candidates are highly organized, detail-focused, with strong written and verbal communication and the ability to juggle multiple projects and priorities.

Qualifications

• Sales administration experience, 1 year required.
• Billing and documentation skills are important.
• Spanish language skills preferred.
• Ability to manage multiple projects and deadlines.
• Strong written and verbal communication.

Responsibilities

• Partner with Outside Sales Rep to manage projects from start to finish.
• Coordinate project requirements, scheduling, documentation, and internal needs.
• Track project progress and proactively follow up on outstanding items.
• Communicate with customers, vendors, and internal departments throughout the project.
• Maintain accurate and organized project records and documentation.
• Identify delays or missing information and keep projects moving.
• Complete billing and other administrative responsibilities associated with project closeout.
• Manage multiple active projects and changing priorities simultaneously.
• Maintain consistent communication with the Outside Sales Rep regarding project status, deadlines, and outstanding items.

Skills

Highly organized

Detail oriented

Strong communication

Self-motivated

Proactive mindset

Project coordination

Time management

Education

Associate degree

Job description

Administrative Assistant – Power Dept, San Marcos

Locations:San Marcos, CA - HQ

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Job Description

Company Overview

Diamond Environmental Services is an essential sanitation service to critical infrastructure work for construction, energy, waste, and healthcare industries and government sites. We are open and operating with the safety of our employees and customers coming first and foremost. With over 20 years industry experience Diamond Environmental Services has become one of Southern California’s premier portable sanitation companies. With Locations serving the counties of San Diego, Riverside, and Orange, San Bernardino and Los Angeles, we provide all types of portable sanitation services and temporary fencing to both commercial and residential customers.

Summary

In this role, you will be paired with an Outside Sales Representative, working together as a team to manage projects from start to finish. You will play a key role in keeping projects organized, moving, and on schedule—from initial coordination through project completion and billing.

This position is ideal for a true go-getter who takes ownership of their work, stays ahead of deadlines, follows up consistently, and isn’t afraid to take initiative to push projects across the finish line.

Key Responsibilities

• Partner closely with an Outside Sales Representative to manage projects from start to completion
• Coordinate project requirements, scheduling, documentation, and internal needs
• Track project progress and proactively follow up on outstanding items
• Communicate with customers, vendors, and internal departments throughout the project
• Maintain accurate and organized project records and documentation
• Identify delays or missing information and take initiative to keep projects moving
• Complete billing and other administrative responsibilities associated with project closeout
• Manage multiple active projects and changing priorities simultaneously
• Maintain consistent communication with the Outside Sales Representative regarding project status, deadlines, and outstanding items

What We’re Looking For

• Highly organized and detail-oriented
• Strong sense of urgency and accountability
• Self-motivated with a proactive, problem-solving mindset
• Comfortable taking ownership of projects and following through
• Able to manage multiple projects, deadlines, and priorities at once
• Strong written and verbal communication skills
• Confident communicating with customers and internal teams
• Comfortable with billing and administrative responsibilities
• Team-oriented and able to build a strong working partnership with an Outside Sales Representative
• Someone who proactively follows up instead of waiting for answers
• Takes pride in seeing projects through from start to completion

Construction, electrical, power, or related industry experience is a plus, but not required. We are willing to train the right candidate.

Diamond Services is an Equal Opportunity Employer and is committed to providing equal employment opportunities to all qualified applicants and employees. Employment decisions are made without regard to any characteristic protected by applicable federal, state, or local law.

Pay: From $22.00 per hour

Benefits:

• 401(k)
• Dental insurance
• Health insurance
• Life insurance
• Paid time off
• Professional development assistance
• Tuition reimbursement
• Vision insurance

Education:

• Associate (Preferred)

Experience:

• Sales administration: 1 year (Required)

Language:

• Spanish (Preferred)

Work Location: In person

WE ARE AN EQUAL OPPORTUNITY EMPLOYER.

About Diamond Environmental Services LP:

Diamond Environmental Services is an Essential Sanitation service to critical infrastructure work forconstruction, energy, waste, and healthcare industries and government sites. We are open and operating with thesafety of our employees and customers coming first and foremost.

With over 20 years industry experience Diamond Environmental Services has become one of Southern California'spremier portable sanitation companies. With Locations serving the counties of San Diego, Riverside, and Orange,San Bernardino and Los Angeles, we provide all types of portable sanitation services and temporary fencing to bothcommercial and residential customers.