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Accounting Assistant I, II, III, or Senior

Tri-State Generation and Transmission Association, Inc.
Westminster, United Statesfull_timeVerifiedPosted 19 Dec 2025
💰 $76,000/yr($41,000/yr$76,000/yr)

About the role

The Senior Accounting Assistant supports the Accounts Payable function by ensuring accurate and timely processing of invoices and payments, while maintaining vendor relationships. This role also supports compliance and contributes to the integrity of financial records to enabling efficient business operations.

Note:
There is one position available and the position will be filled at one of four job grade levels: Accounting Assistant (Accounts Payable) I, job grade 1; Accounting Assistant (Accounts Payable) II, job grade 2, Accounting Assistant (Accounts Payable) III, job grade 4; or Senior Accounting Assistant (Accounts Payable), job grade 5. This decision will be based on the qualifications and experience of the candidate selected, and Tri-State business needs at the time of hire.

 
Tri-State recognizes the value of a highly-engaged and committed workforce and provides an excellent benefits program that includes:
Medical Insurance, Dental Insurance, Vision Insurance, Health Savings Account (HSA), Flexible Spending Accounts (FSA), Tuition Reimbursement, Flexible Work Schedules including compressed work week and telecommuting opportunities to work remotely up to 40%, Life Insurance, 401K, Long Term Disability (LTD), Short Term Disability (STD), Employee Assistant Program (EAP) and Paid Leave Benefits. 
 

Senior Accounting Assistant (Accounts Payable)
Hiring Salary Range: $63,000-$76,000
Accounting Assistant (Accounts Payable) III 
Hiring Salary Range: $56,000-$68,000
Accounting Assistant (Accounts Payable) II
Hiring Salary Range: $46,000-$54,000
Accounting Assistant (Accounts Payable) I 
Hiring Salary Range: $41,000-$48,000


Actual compensation offer to candidate may vary outside of the posted hiring salary range based upon work experience, education, and/or skill level.

  • Process and verify invoices for completeness and duplicates, submit for approval
  • Process payments according to payment terms and approval of invoices
  • Follow up on unmatched items, invoices without adequate backup and un-invoiced items.
  • Reconcile vendor statements and resolve discrepancies 
  • Investigate invoices that are beyond predefined payment terms.
  • Calculate appropriate use tax accruals for appropriate items.
  • Coordinate Communication of AP policies and procedures both internally and externally.
  • Monitor month end close process with AP team.
  • Assist AP Manager with annual 1099 process. 
  • Request current data for vendor records.
  • Provide back up as requested to other accounting assistants. 
  • Perform Accounting corrections for GL String/POET
  • Perform check runs and maintenance.
  • Monitoring and managing daily AP status to ensure invoices are processed timely and prompt pay discounts are taken.
  • Responsible for more high level of complex activities.
  • Monitor new vendor and vendor maintenance process.
  • Monitor vendor payment method internally and externally. 
  • Assist with Special Projects assigned by AP Manager
  • Maintain compliance with all company policies and procedures and attain knowledge and remain knowledgeable of regulations, laws, standards, and best practices applicable to functional area.
  • Because Tri-State has an obligation to provide continuous, reliable electric service to its customers, the ability to work overtime at any time of the day or week is considered an essential function of the job.

     

  • OTHER DUTIES AND RESPONSIBILITIES 
  • Perform other related duties as assigned

     

  • SUCCESS FACTORS/JOB COMPETENCIES: 
  • Planning: ability to think ahead and plan within timelines and resources; develop scopes, plan and schedule work; set priorities and goals; anticipate and adjust for problems; evaluate workloads; measure and evaluate performance against established goals.
  • Time management: ability to successfully plan and implement objectives within established timelines and work schedules.<

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