Medius Jobs in Colorado (NOW HIRING)

Accounts Payable Lead
Drive Process. Solve Problems. Make an Impact.
Are you an Accounts Payable professional who enjoys leading processes, resolving complex issues, and partnering across teams rather than spending your day on high-volume data entry? This is an opportunity to join a high-performing, collaborative accounting team where your expertise will influence financial accuracy, process improvements, and operational success.
As our Accounts Payable Lead, you'll serve as the go-to resource for AP operations, vendor relationships, expense management, and process optimization while working alongside a tenured team in an innovative, fast-growing organization.
Why You'll Love This Role
✅ Lead and improve AP processes instead of just processing transactions
✅ Partner directly with leadership and cross-functional teams
✅ Play a key role in a collaborative, highly visible accounting department
✅ Work with modern tools including Microsoft Dynamics 365, Medius, Navan, and Excel
✅ Join a growing organization where attention to detail and excellence are truly valued
Position Overview
The Accounts Payable Lead plays a critical role within our accounting team, providing oversight and guidance for accounts payable operations while ensuring accurate, timely, and compliant financial transactions. This position focuses on invoice review, coding approvals, vendor management, issue resolution, expense oversight, and continuous process improvement.
The ideal candidate is a proactive problem-solver who enjoys investigating discrepancies, improving workflows, and serving as a trusted resource for both vendors and internal stakeholders.
Key Responsibilities

• Review and approve AP invoices, corporate credit card transactions, and employee expense reports for accuracy, coding, approvals, and policy compliance.
• Serve as the primary resource for accounts payable operations, providing guidance and support for complex invoice, vendor, and payment issues.
• Research and resolve invoice discrepancies, payment concerns, and vendor account issues.
• Build and maintain strong vendor relationships through professional communication and timely resolution of inquiries.
• Partner closely with Purchasing and Receiving teams to support three-way matching and resolve discrepancies.
• Assist with balance sheet reconciliations and support compliance with GAAP and DCAA requirements.
• Oversee corporate credit card activity and identify out-of-policy expenses.
• Serve as the lead administrator for Navan, managing travel and expense activity and general ledger integration.
• Support customer billing and additional accounting functions as needed.
• Utilize Medius and Microsoft Dynamics 365 to support efficient AP workflows and financial accuracy.
• Act as a resource for employees regarding timesheets, PTO balances, payroll questions, and accounting-related inquiries.
• Identify and implement process improvement opportunities that increase efficiency, accuracy, and internal controls.

What We're Looking For
Required Qualifications

• 3+ years of Accounts Payable experience, including three-way matching.
• Strong Microsoft Excel skills, including Pivot Tables and VLOOKUPs.
• Experience reviewing invoices, processing transactions, and performing reconciliations.
• Experience managing expense reports and corporate credit card programs.
• Strong analytical and problem-solving abilities.
• Exceptional attention to detail and commitment to accuracy.
• Ability to thrive in a role focused on oversight, troubleshooting, and process improvement.
• Strong communication and relationship-building skills.
• Knowledge of GAAP principles and experience supporting compliance requirements.

Preferred Qualifications

• Experience with Microsoft Dynamics 365.
• Experience with Medius AP automation software.
• Familiarity with Navan or similar travel and expense platforms.
• SharePoint experience.
• Associate degree or higher in Accounting, Finance, Business, or a related field.
• Desire for continued professional growth and development within accounting and finance.

Work Environment
This is a fully onsite opportunity at a secure facility supporting cutting-edge Department of Defense programs. You'll join a small, experienced, and highly collaborative accounting team known for its open-door culture, strong teamwork, and commitment to excellence.
This environment is ideal for professionals who enjoy solving problems, supporting colleagues, improving processes, and contributing to a growing organization focused on innovation and operational excellence.
Technology You'll Use

• Microsoft Dynamics 365
• Medius
• Navan
• Microsoft Excel
• SharePoint

Ready to take your Accounts Payable career beyond processing and into leadership?
Apply today and become a key contributor to a team where your expertise, ideas, and initiative make a real impact.
Job Type & Location
This is a Contract to Hire position based out of Longmont, CO.
Pay and Benefits
The pay range for this position is $35.00 - $41.83/hr.
Individual compensation offered for this position within this range will depend on many factors, including qualifications, skills, relevant experience, job knowledge, geographic location, internal equity, and other pertinent job-related factors.
Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following:
• Medical, dental & vision
• Critical Illness, Accident, and Hospital
• 401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available
• Life Insurance (Voluntary Life & AD&D for the employee and dependents)
• Short and long-term disability
• Health Spending Account (HSA)
• Transportation benefits
• Employee Assistance Program
• Time Off/Leave (PTO, Vacation or Sick Leave)
Workplace Type
This is a fully onsite position in Longmont,CO.
Application Deadline
This position is anticipated to close on Sep 4, 2026.
About Aston Carter
Aston Carter provides world-class corporate talent solutions to thousands of clients across the globe. Specialized in accounting, finance, human resources, talent acquisition, procurement, supply chain and select administrative professions, we extend the capabilities of industry-leading companies. We draw on our deep recruiting expertise and expansive network to meet the evolving needs of our clients and talent community with agility and excellence. With offices across the U.S., Canada, Asia Pacific and Europe, Aston Carter serves many of the Fortune 500. We are proud to be a ClearlyRated Best of Staffing® Platinum Award winner for both client and talent service.
The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.
If you would like to request a reasonable accommodation, such as the modification or adjustment of the job application process or interviewing process due to a disability, please email astoncarteraccommodation@astoncarter.com for other accommodation options.
San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.
Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.
Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.