Marcella Sienko
Mount Prospect,IL
Summary
Adaptable professional with experience in customer service, cash handling, and regulated testing operations. Recognized for multitasking, attention to detail, and maintaining accurate records. Committed to supporting smooth daily operations and trusted service.
Overview
1
1
Language
11
11
years of professional experience
Work History
Drug and Alcohol Technician
MS Safety Partners LLC
Bensenville, IL
02.2023 - Current
- Supported safety audits by preparing documentation and resolving outstanding compliance items.
- Demonstrated adaptability when faced with new challenges or technologies, enabling quick mastery of necessary skills.
- Liaised with internal departments to optimize productivity and efficiency.
- Collected and processed urine, saliva, and breath specimens following chain-of-custody procedures.
- Monitored workflow and reinforced regulatory compliance across daily testing operations.
- Reduced errors in drug testing reports through meticulous attention to detail and thorough verification of results.
- Supported clients'' needs through clear communication and timely response to inquiries or concerns about drug test results.
- Ensured compliance with federal, state, and local regulations by diligently following all relevant guidelines and procedures.
- Verified donor identity and documented testing information for accurate recordkeeping.
- Prepared specimens for laboratory analysis and maintained compliance with testing protocols.
- Trained new technicians on specimen handling, documentation, and confidential procedures.
Cashier Manager
Sky Tobacco
River Grove, IL
03.2019 - 02.2023
- Supervised cashier team, ensuring accurate transactions and consistent customer service.
- Trained new cashiers on register procedures, payment handling, and store policies.
- Enforced age-verification standards for tobacco sales and compliant checkout practices.
- Addressed customer concerns at register, supporting smooth checkout and repeat business.
- Managed shift coverage, balancing front-end operations and staffing needs.
- Managed daily cash deposits, ensuring accuracy and timely submission to the bank.
- Quickly and accurately counted drawers at start and end of each shift.
- Resolved customer complaints quickly to maintain customer satisfaction.
- Monitored inventory to keep store stocked with necessary items and avoid running out of in-demand products.
- Established strong rapport with customers, fostering loyalty and repeat business through exceptional service.
Cashier
Goody’s Fast Food
River Grove, IL
04.2016 - 02.2019
- Processed customer orders accurately at register and POS system.
- Maintained clean, organized checkout area and restocked needed supplies.
- Communicated order details clearly to kitchen staff for timely fulfillment.
- Greeted customers entering store and responded promptly to customer needs.
- Operated cash register for cash, check, and credit card transactions with excellent accuracy levels.
Education
High School Diploma -
Ridgewood Community High School
Norridge, ILSkills
- Attention to detail
- Customer service
- Works Well Under Pressure
- Multitasking and organization
- Deadline oriented
- Problem-solving
- Work Planning and Prioritization
- Work ethic and integrity
- Cash handling
Languages
Polish
Native or Bilingual
Work Availability
monday
tuesday
wednesday
thursday
friday
saturday
sunday
morning
afternoon
evening
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Timeline
Drug and Alcohol Technician
MS Safety Partners LLC
02.2023 - Current
Cashier Manager
Sky Tobacco
03.2019 - 02.2023
Cashier
Goody’s Fast Food
04.2016 - 02.2019
High School Diploma -
Ridgewood Community High School