Bonnie DeKoster
Cottage Grove,MN
Summary
Adaptable to changes in priority, seamlessly managing multiple assignments simultaneously, and utilizing excellent follow through skills with diligence. Anticipates and takes initiative to support business needs. Approachable by team members as a first point of contact with demonstrated ability to seek out answers and problem solve. Strong interpersonal communication skills to build robust relationships throughout the organization. Capable of effectively working with many different work styles. Known as a credible leader who quickly builds partnerships and trusting relationships to reap results. Discrete when overseeing confidential information.
Senior administrative professional with proven track record in optimizing office functions and supporting executive teams. Known for efficient handling of schedules, correspondence, and meeting logistics to drive organizational success. Highly collaborative, adaptable to changing needs, and committed to delivering exceptional administrative support.
Overview
20
20
years of professional experience
Work History
Senior Administrative Assistant
Marathon Petroleum Company LP
01.2022 - Current
- Coordination of employee events, community events, contributor on SPP Rise workstreams, maintaining VP budget, and ensuring day to day operations run smoothly in the administration building.
- Coordinate SPP employee events such as summer picnic, holiday party, children’s holiday party.
- Lead organizer for Community Day 2025
- Assist Community Relations Representative with community day 2023, golf outing, CAP meeting preparations, and assist where needed.
- Contributor on two SPP Rise workstreams, Owning our Responsibilities and Empowering Our People
- St. Paul Park Recreation Club, Secretary, organizing events for employees outside work hours
- Wellness Champion, organizing wellness opportunities for employees
- Maintain VP yearly budget.
Administrative Assistant-Front Desk
Allied Universal @ Marathon Petroleum
01.2021 - 01.2022
- Ensure guests have appropriate badge, answer and direct phone calls, sort and distribute mail and packages, assist various departments with requests and ensure lunchroom supplies are kept full.
- Knowledge of Lenel system which includes creating and updating badges and ensuring areas are safe.
- Welcome guests, assist vendors, and ensure phone calls and mail get directed to the appropriate person.
- Distribute mail to the appropriate departments.
Administrative Assistant-Sales
Rihm Kenworth
01.2020 - 01.2021
- Ensure department operations run smoothly, support sales staff with sales process, submit trucks sales into multiple systems, support customers with warranty and titling questions, and report accurate sales and commissions to the Controller.
- Assist truck sales representatives throughout the sales process.
- Reports truck sales into multiple systems and ensures truck deals are submitted correctly to Controller.
- Create Purchase Orders for Truck Sales Department
Accounts Payable Specialist-Contract
ASTON CARTER @ MASTEC
01.2020 - 01.2020
- Responsible for assisting accounting team with full cycle accounts payable, converse with buyers to resolve issues, and distribute department mail to appropriate areas.
- Efficiently process the approved invoices into Oracle in a timely manner, ensuring extensive coding is correct, and resolve issues associated with the process.
- Collaborate with buyers regarding purchase orders and resolve issues so invoices can be processed quickly.
- Distribute department mail to appropriate areas.
Administrative Assistant
UNIVERSAL SERVICES
01.2020 - 01.2020
- Accurately update fleet information in maintenance software, code invoices, monthly reporting, and keep fleet files current.
- Accurately maintain fleet information in software applications and distribute monthly reporting
- Thoroughly enter invoices, coding to the correct location and company.
Accounting Specialist 2
BREMER INSURANCE
01.2017 - 01.2019
- Effectively receive cash receipts, reconcile direct bill statements, monitor aged receivables, and work with carriers to correct discrepancies.
- Efficiently process all cash receipts, commission statements, customer payments, and aged receivable payments daily. Thoroughly reconcile direct bill commission statements for several carriers by the end of month.
- Contact internal and external partners regarding statement errors, payment problems, and discrepancies.
- Provided support to accounting staff and customer service representatives.
Advanced Administrative Assistant-Western Refining/Northern Tier Energy
St. Paul Park Refining Company
01.2005 - 01.2016
- Company Overview: (previously Western Refining, NTE, & Marathon Petroleum)
- Ensured daily office operations ran smoothly, maintain DOT compliance files, maintain budget, co-chaired a safety panel, developed and revised procedures, organized and partook in community relation events.
- Improved corporate image by organizing and participating in community relation events.
- Enhanced profitability by ensuring accuracy of information, retaining, and auditing daily activities, and preparing multiple monthly reports.
- Earned multiple high ratings from DOT officers due to diligence and organization through administration of DOT compliance files for multiple transport fleets.
- Assisted in achieving a phenomenal safety record, by creating and organizing a safety panel, which promoted relevant topics, teamwork, and focused on at-risk behaviors.
- Successful coordination of meeting schedules for multiple supervisors, preparing appropriate materials, and distributing meeting minutes.
- Contributed and supported management through yearly budgeting, entering PO’s, coding invoices, coding and submitting company credit cards, and maintaining accounts for accurate billing.
- Ensured compliance with regulations by developing and revising company procedures and policies.
Education
Certificate of Completion - Child Care & Education Level II
Dakota County Technical College
Rosemount, MNAssociate of Arts (AA) - Child Development
Inver Hills Community College
Inver Grove Heights, MNSkills
- Effective written communication
- Effective problem resolution
- Effective time management
- Financial budget oversight
- Flexible problem-solving
- Volunteer coordination
- Community engagement
- Development of promotional materials
- Collaborative teamwork
- Client support
- Event coordination
Timeline
Senior Administrative Assistant
Marathon Petroleum Company LP
01.2022 - Current
Administrative Assistant-Front Desk
Allied Universal @ Marathon Petroleum
01.2021 - 01.2022
Administrative Assistant-Sales
Rihm Kenworth
01.2020 - 01.2021
Accounts Payable Specialist-Contract
ASTON CARTER @ MASTEC
01.2020 - 01.2020
Administrative Assistant
UNIVERSAL SERVICES
01.2020 - 01.2020
Accounting Specialist 2
BREMER INSURANCE
01.2017 - 01.2019
Advanced Administrative Assistant-Western Refining/Northern Tier Energy
St. Paul Park Refining Company
01.2005 - 01.2016
Associate of Arts (AA) - Child Development
Inver Hills Community College
Certificate of Completion - Child Care & Education Level II
Dakota County Technical College
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