Office Manager

Epicosity; Sioux Falls (SD); Hybrid; USD 42,000 - 56,000; Full time

Job summary

Epicosity, a full-service marketing agency in Sioux Falls, SD, is seeking an organized Office Manager to keep our busy office running smoothly and support a fast-paced team. You will greet clients and guests warmly, manage accounts payable end-to-end, process monthly invoices, and ensure timely payments.

You will coordinate travel, vendor relations, and office services, while maintaining organized records and filing systems.

Qualifications

• Experience in office management and billing processes.
• Strong organizational skills and attention to detail.
• Ability to coordinate multiple tasks and priorities.

Responsibilities

• Greet clients and guests warmly, representing Epicosity with professionalism.
• Manage accounts payable end-to-end: invoices, documentation, vendor statements, and checks.
• Process monthly client invoices and ensure timely collection of receivables.
• Handle 1099/W-9 maintenance, vendor inquiries, and billing issue resolution.
• Support the CEO and VP of Finance with accurate, timely financial tasks.
• Oversee office supply inventory and maintain relationships with vendors.
• Keep the office organized, tidy, and running smoothly.
• Coordinate with vendors for cleaning, technology, and facility needs.
• Sort mail and prepare shipments (US, UPS, FedEx).
• Manage employee travel arrangements and coordinate tradeshow logistics.
• Maintain filing systems in accordance with agency processes.
• Plan and coordinate office culture events and employee experiences.

Skills

Organization

Communication

Accounts Payable

Vendor Management

Employee Support

Job description

Looking for an exciting career?
Let's talk.

Join Our Epic Team

Epicosity, a full-service marketing agency located in Sioux Falls, SD, is looking to hire a Office Manager

At Epicosity, we're a full-service advertising agency that guides our clients and staff on a journey to awaken their inner champion. Our work spans branding, digital, web, video, and media — and it's earned recognition locally, regionally, and nationally. We've also been recognized as one of the Midwest's best places to work by Prairie Business Magazine. That culture doesn't happen by accident, and the right Office Manager plays a big part in keeping it thriving.

We're looking for an organized, detail-obsessed, people-first Office Manager who takes pride in keeping things running smoothly — and who genuinely loves being the person everyone can count on.

The Opportunity

Primary Responsibilities

Client & Guest Experience

Be the first face and voice of Epicosity — greeting guests and callers with warmth, professionalism, and energy

Never miss an opportunity to excite and delight clients

Finance & Billing

• Manage accounts payable end-to-end: reviewing invoices, maintaining documentation, reconciling vendor statements, and distributing checks
• Process monthly client invoices and manage timely collection of outstanding receivables
• Handle 1099/W-9 maintenance, vendor inquiries, and billing issue resolution
• Support the CEO and VP of Finance with accurate, timely financial tasks

Office Operations

• Oversee office supply inventory and manage relationships with environmentally responsible, cost-effective vendors
• Keep the office organized, tidy, and running like clockwork
• Coordinate with vendors for cleaning, technology, trash, and other facility needs
• Sort and distribute mail; prepare US, UPS, and FedEx shipments as needed
• Manage employee travel arrangements and coordinate tradeshow logistics
• Maintain organized, clearly labeled filing systems in accordance with agency processes

Culture & Events

Plan and coordinate office culture events that bring the team together and reinforce Epicosity's intentionally positive workplace

Champion the employee experience by organizing celebrations, team activities, and internal initiatives that make Epicosity a great place to work