Sumin Jo
Aylesbury,Buckinghamshire
Summary
Customer-focused professional with strong experience in account management and commercial support within the waste management industry. Experienced in managing corporate FM and broker accounts, resolving service challenges and maintaining strong relationships with customers, suppliers and internal stakeholders. Skilled in commercial negotiations, cost-saving initiatives, performance reporting and using Excel and Power BI to support effective business decisions.
Overview
1
1
Certification
7
7
years of professional experience
Work history
Commercial Support Manager
Biffa
Aylesbury, Buckinghamshire
2026.04 - Current
- Managed supplier relationships, negotiating competitive pricing and identifying opportunities to reduce costs through supplier rationalisation.
- Managed supplier pricing data within internal systems, ensuring accurate and consistent commercial information across the business.
- Managed commercial event waste projects from quotation through delivery and collection, ensuring successful execution while identifying opportunities for additional services and repeat business.
Corporate Account Executive
Biffa
Aylesbury, Buckinghamshire
2024.04 - 2026.03
- Produced performance reports and data analysis using Excel and Power BI, providing insights for internal and external stakeholders.
- Act as the main point of contact for a portfolio of commercial clients, managing day-to-day account activities and service delivery.
- Handle and resolve invoice queries, credit requests, and billing discrepancies in a timely and professional manner.
- Support retention and renewal efforts by delivering high levels of customer service and identifying upselling opportunities where appropriate.
- Monitor and maintain compliance with SLAs and KPIs, ensuring performance standards are consistently met or exceeded.
Customer Representative
Biffa Waste Management
Aylesbury, Buckinghamshire
2023.08 - 2024.03
- Identify and assess customers’ needs to achieve satisfaction
- Keep records of customer interactions, process customer accounts and file documents
- Handle customer complaints, provide appropriate solutions and alternatives within the time limits; follow up to ensure resolution
- I have undergone comprehensive training in cases, emails, KCP and buddying within the first six months of my employment tenure, enhancing my proficiency in these areas
- I earned the esteemed titles of 'Employee of the Month' and 'Rookie of the Year,' recognizing my outstanding contributions and rapid adaptation to the team within a short span
- Permanent
Customer Care Advisor
MATCHESFASHION
Remote
2021.06 - 2023.08
- Have knowledge with the products and meet sales target.
- Maintain customer satisfaction with forward-thinking strategies focused on addressing customer needs and resolving concerns.
- Processing complaints and, if appropriate, issuing refunds.
- Permanent
Activities Co-Ordinator
ChilternCare
, Buckinghamshire
2021.08 - 2022.06
- Coordinated, planned, developed and implemented activities designed to enrich lives of assisted living residents
- Organised events to support residents quality of life
- Encouraged, supported and assisted residents with activities and documented activity attendance and degree of involvement.
- Permanent
ESL Assistant Teacher
Yeolmae Academy
Daejeon
2020.01 - 2022.03
- Taught courses under guidance of senior instructors
- Encouraged small groups to discuss topics and explore concepts through hands-on activities.
- Developed materials for classroom teachers to support instruction, lab work or in-class activities
- Permanent
Education
GCSEs -
Chungnam Girls’ Hi
South KoreaSkills
- Advanced Microsoft Excel (PivotTables, VLOOKUP, Data Analysis, Reporting)
- Power BI Reporting & Data Visualisation
- Stakeholder Relationship Management
- Commercial Negotiation & Supplier Management
- Customer Retention & Relationship Management
Certification
- Practical Project Management
Timeline
Commercial Support Manager
Biffa
2026.04 - Current
Corporate Account Executive
Biffa
2024.04 - 2026.03
Customer Representative
Biffa Waste Management
2023.08 - 2024.03
Activities Co-Ordinator
ChilternCare
2021.08 - 2022.06
Customer Care Advisor
MATCHESFASHION
2021.06 - 2023.08
ESL Assistant Teacher
Yeolmae Academy
2020.01 - 2022.03
GCSEs -
Chungnam Girls’ Hi