Office Administrator

Mack & Associates, Ltd.; Littleton (CO); On-site; USD 60,000 - 65,000; Full time

Benefits offered by this job

Medical benefits

PTO

401(k) plan

Bonus program

Job summary

Mack & Associates, Ltd. is seeking an organized Office Administrator in Littleton, CO to manage day-to-day office operations and provide essential administrative, accounting, and operational support.

The role involves coordinating vendors, supporting financial processes, and assisting staff across departments. Ideal candidates will have a High School diploma (Associate’s preferred), 1+ years’ experience in admin/operations, and strong MS Office skills.

Qualifications

• High School diploma or equivalent required; an Associate’s degree in Business Administration or related field preferred.
• 1+ years in office administration, accounting support, or related role preferred.
• Strong organizational and time-management abilities with deadline drive.
• Excellent attention to detail and handling of financial records and sensitive information.
• Proficient in Microsoft Office and familiar with business/document/inventory systems.

Responsibilities

• Manage daily office operations including reception, mail, supplies and building services.
• Support accounting by processing payment requests, tracking invoices, and maintaining records.
• Assist with vendor setup, payments, documentation, and account matters.
• Process and track incoming payments, refunds, and other financial transactions.
• Coordinate company vehicles/equipment, registrations, maintenance, and access.
• Support onboarding/offboarding and handle equipment, supplies, access, and admin needs.
• Assist meetings, trainings, travel, events, and special projects across departments.

Skills

Organizational skills

Time management

Communication

Team player

Attention to detail

Microsoft Office

Education

High School diploma

Associate’s degree preferred

Tools

MS Office

Office management software

Job description

A well-established company is seeking a proactive and highly organized Office Administrator to join their team in Littleton, Colorado. This is an exciting opportunity for a detail-oriented professional to take ownership of day-to-day office operations while providing essential administrative, accounting, and operational support to the team. The Office Administrator will play a key role in keeping the office running efficiently, coordinating vendor and facility needs, supporting financial processes, and assisting employees across the organization. This role is ideal for someone who enjoys wearing multiple hats, thrives in a fast-paced environment, and takes pride in staying organized and finding solutions. With a competitive salary range of $60,000–$65,000 and the opportunity to make a meaningful impact on the overall success of the office, this is an excellent opportunity for an administrative professional looking for a long-term career opportunity. This company offers benefits including medical, PTO, 401(k), and a bonus program.

Responsibilities of the Office Administrator:

• Manage daily office operations, including reception, mail and packages, supplies, building services, and general office upkeep.
• Support accounting functions by processing payment requests, tracking invoices, monitoring outstanding items, and maintaining accurate financial records.
• Assist with vendor administration, including new vendor setup, payment coordination, documentation, and resolving outstanding account matters.
• Process and track incoming payments, refunds, and other financial transactions while ensuring information is properly recorded and communicated.
• Coordinate company vehicles and equipment by maintaining records and assisting with registration, maintenance, access, and other related needs.
• Support employee onboarding and offboarding by coordinating equipment, supplies, access, and other administrative requirements.
• Assist with meetings, trainings, travel, events, and special projects while providing general administrative and operational support across departments.

Qualifications of the Office Administrator:

• High School diploma or equivalent is required; an Associate’s degree in Business Administration, Accounting, or a related field is preferred.
• 1+ years of experience in office administration, accounting support, operations, or a related administrative function is preferred.
• Strong organizational and time-management skills with the ability to prioritize competing responsibilities and meet deadlines.
• Excellent attention to detail and accuracy when handling financial records, documentation, and sensitive information.
• Proficiency with Microsoft Office Suite and familiarity with business, document, or inventory management systems.
• Strong written and verbal communication skills with a professional, service-oriented approach when working with employees, vendors, and visitors.
• Resourceful and dependable team player who can work independently, adapt to changing priorities, exercise sound judgment, and maintain confidentiality.