Adan Cerda
Oceanside
Summary
Experienced Office Management and Customer Service Professional optimizing productivity, efficiency and service quality across various environments. Highly dependable, ethical and reliable support specialist and leader that blends advanced organizational, technical and business acumen. Works effectively with cross-functional teams in ensuring operational and service excellence.
Overview
9
9
years of professional experience
Work History
Customer Service Supervisor
Diamond Environmental Services
San Marcos, CA
11.2023 - Current
- Managed billing operations handling up to $1.5 million in monthly transactions, ensuring accurate invoicing and timely collections
- Supervised daily call center operations averaging 600 calls while resolving customer concerns and maintaining high customer satisfaction
- Assisted with marketing initiatives to improve brand visibility, customer engagement, and business growth
- Initiated and led a customer service improvement campaign focused on enhancing service quality, improving team performance, and increasing overall customer satisfaction scores
- Oversaw and supported the customer service integration during the merger of three companies, ensuring a smooth transition and maintaining high standards of customer satisfaction and communication throughout the process
- Led and supported a team of 50 employees by providing training, guidance, and performance oversight to maintain efficient operations
Intern / Family & Youth Outreach Program
Boys & Girls Club of Garden Grove
Garden Grove, CA
01.2025 - 05.2025
- Co-managed a juvenile diversion and educational program focused on rehabilitation, personal development, and reducing repeat offenses
- Conducted client intakes, assessments, and counseling support for at-risk youth, helping develop individualized service plans
- Maintained accurate and confidential client records through Clinic Tracker and case management systems
- Collaborated with the Garden Grove Police Department and Garden Grove Unified School District to coordinate services and support for juvenile clients
- Assisted counselors with case management, client support, and implementation of counseling services
- Supported community outreach initiatives to increase awareness of diversion programs and counseling resources for at-risk youth
Manufacturing Technician
Genmark Dx, Roche
Carlsbad, CA
05.2023 - 11.2023
- Follow cGMP and ISO standards to ensure compliance in a regulated manufacturing environment
- Operate in cleanroom conditions while adhering to strict safety, quality, and sanitation protocols
- Execute manufacturing SOPs and complete production tasks according to schedule and work orders
- Maintain organization of work areas, tools, and materials to support efficient production flow
- Operate across the manufacturing line, working independently and as part of a team
- Ensure accurate documentation by reviewing manufacturing records, correcting errors, and preparing files for quality release
- Maintain a safe work environment when handling chemicals and equipment while meeting production standards
Sales Consultant
CarMax
Oceanside, CA
08.2022 - 08.2023
- Utilized CarMax inventory knowledge to assist customers in selecting vehicles aligned with their needs and preferences
- Guided customers through the full sales process, including vehicle selection, appraisals, test drives, and financing applications
- Completed accurate documentation and transaction records to ensure smooth and compliant sales processes
- Held California Sales License
Gear Up Campus Aide 3
MiraCosta College
Oceanside, CA
01.2020 - 12.2021
- Tutor middle school and high school-aged students within Oceanside Unified School District campuses working alongside OUSD Staff and Faculty.
- Facilitate tutoring program for a specific middle and high school and supervise employees and students, along with and in the absence of the campus coordinator.
Team Lead
Regal Inc.
Oceanside, CA
10.2019 - 10.2020
- Managed theatre opening and closing operations to ensure timely and efficient daily execution
- Oversaw movie screenings, maintaining proper scheduling, presentation quality, and guest experience standards
- Ensured compliance with food safety and quality guidelines in concessions and bar operations
- Handled cash management, including register balancing, discrepancy resolution, and daily reporting
- Supported bar operations and maintained accountability for cash handling and operational accuracy
Assistant Manager
Legoland California Food and Beverage Dept.
Carlsbad, CA
06.2017 - 08.2022
- Supervised a team of 30+ front-of-house and back-of-house staff, overseeing dining room, bar, and daily operational activities
- Managed ordering, inventory control, and stockroom audits to support cost efficiency and financial targets (COGS, spend per cap, EBITDA)
- Maintained high-quality guest experience standards for high-volume, family-focused theme park dining
- Ensured compliance with OSHA regulations, health codes, and restaurant safety policies
- Monitored food quality and service performance to maintain customer satisfaction and operational standards
- Led, trained, and motivated staff to achieve peak performance in a fast-paced environment
- Certified in TIPS and Food Handler Management
Education
Master of Arts Degree - Higher Education Student Affairs
Grand Canyon University
Phoenix, AZ08.2027
Bachelor of Arts Degree - Psychology
California State University Fullerton
Fullerton, CA05.2025
Associate of Arts Degree - Psychology
MiraCosta Community College
Oceanside, CA05.2021
Skills
- Exceptional active listening and interpersonal communication skills, with the ability to build strong professional relationships and collaborate effectively across teams and departments
- Highly adaptable and quick to learn new systems, processes, and work environments, allowing for a smooth transition into fast-paced or evolving roles
- Strong work ethic with a dependable, results-driven mindset and a commitment to maintaining professionalism, accountability, and high performance standards
- Proven leadership abilities with experience motivating others, solving problems efficiently, and contributing to a positive and productive team environment
- Skilled at managing challenging tasks and responsibilities with confidence, composure, and attention to detail
Languages
Spanish
Native or Bilingual
Timeline
Intern / Family & Youth Outreach Program
Boys & Girls Club of Garden Grove
01.2025 - 05.2025
Customer Service Supervisor
Diamond Environmental Services
11.2023 - Current
Manufacturing Technician
Genmark Dx, Roche
05.2023 - 11.2023
Sales Consultant
CarMax
08.2022 - 08.2023
Gear Up Campus Aide 3
MiraCosta College
01.2020 - 12.2021
Team Lead
Regal Inc.
10.2019 - 10.2020
Assistant Manager
Legoland California Food and Beverage Dept.
06.2017 - 08.2022
Associate of Arts Degree - Psychology
MiraCosta Community College
Master of Arts Degree - Higher Education Student Affairs
Grand Canyon University
Bachelor of Arts Degree - Psychology
California State University Fullerton