Office Assistant

Business Unit Overview

Contribute meaningfully at the core of corporate operations for Post Holdings, Inc. We are seeking a skilled Office Assistant to join our St. Louis headquarters and support our corporate leaders with top-tier administrative and office services. This full-time, onsite role offers the chance to be at the heart of our daily operations—balancing admin support, office coordination, and event logistics. If you’re a multitasker with a sharp eye for detail and a passion for creating order, this is your opportunity to help fuel team success.

Feeding the world is what we do – how we do it is unique. We are not your textbook consumer packaged goods company. While others may be slow to make change happen, Post continuously drives both inorganic and organic growth. Our history is evidence of that fact with over 100 years of heritage and growth from brands that transcend generations like Honey Bunches of Oats, Fruity Pebbles, Malt-O-Meal, Bob Evans, Kibbles 'n Bits, Egg Beaters, Peter Pan peanut butter and more. Our foodservice and ingredient businesses supply other products you love for brands, restaurants and stores.

Our offices and manufacturing sites are in more than 60 locations in five countries, and we have 11,500+ employees. Over the past 12 years, Post has made 25+ acquisitions and reached $7.9 billion in net sales in fiscal 2024. During turbulent times of market uncertainty, the food industry has provided a level of stability unlike other industries.

Post Holdings, Inc. is a Fortune 500 ® company headquartered in Brentwood, a suburb of St. Louis, Missouri. Our casual professional atmosphere encourages team members to collaborate, innovate and support our operating companies. Our passion and drive advance the reputation of our operating companies and brands—together, we make a difference.

Responsibilities

The primary purpose of this position is to provide responsive and high-quality office support and administrative assistant services. This position will coordinate and execute clerical functions for the office and provide shared administrative support to corporate functions.

RESPONSIBILITIES

Administrative Support

Manage calendar and prioritize inquiries and requests, resolve scheduling conflicts, schedule internal and external meetings for corporate leaders as requested

Coordinate travel arrangements, prepare itineraries, plan logistics and prepare and submit expense reports

Prepare certain documents on behalf of leaders and proofread materials for clarity, completeness, and accuracy

Prepare and send letters as directed

Order, schedule and set up food for luncheons and trainings

Screen all incoming phone calls, inquiries, visitors, and correspondence, and route accordingly

Perform research as needed

Create reports, presentations and meeting minutes as requested

Develop and carry out an efficient documentation and filing system

Coordinate events as necessary

Perform other administrative duties and project work as assigned

Office Services

Greet and assist onsite guests

Order and timely maintain office supply inventory in the building

Identify opportunities for process and office management improvements, and support these improvements

Ensure office policies and procedures are implemented appropriately

Assist with office layout planning and office moves with Corporate Facilities

Place service calls for office equipment and act as the primary point of contact for general office inquiries and building maintenance

Maintain and stock copy room, kitchen and conference rooms in an orderly and timely manner

Ensure a clean and organized office environment

Provide oversight for the safety and security of employees and their property

Manage expense reporting according to internal policies and procedures

Oversee proper maintenance for coffee service, vending machines, cleaning, etc

Liaison with building management company

Qualifications

REQUIRED QUALIFICATIONS

Education/Experience:

At least 3-5 years of experience as a receptionist, office manager or an administrative assistant

High School degree or equivalent required

Knowledge/Skills:

Excellent knowledge of Microsoft Office and Adobe Professional

Ability to work with minimal oversight

Exemplary planning and time management skills

Strong attention to detail and organizational skills

Ability to solve problems, including non-routine issues

Ability to multitask, prioritize daily workload

Establish and maintain cooperative and effective working relationships with others

Excellent written and oral communication skills

Self-motivated and ability to work independently

Complete work with many interruptions

Ability to maintain discretion and keep highly sensitive information confidential

Physical Demands:

Sitting or standing for extended periods of time

Bending at the waist, kneeling or crouching to file materials

Lifting, carrying, pushing or pulling objects up to 25 pounds

Reaching overhead and above shoulders to retrieve supplies

This is a fully onsite role located in St. Louis, Missouri.

The primary purpose of this position is to provide responsive and high-quality office support and administrative assistant services. This position will coordinate and execute clerical functions for the office and provide shared administrative support to corporate functions.

RESPONSIBILITIES

Administrative Support

Manage calendar and prioritize inquiries and requests, resolve scheduling conflicts, schedule internal and external meetings for corporate leaders as requested

Coordinate travel arrangements, prepare itineraries, plan logistics and prepare and submit expense reports

Prepare certain documents on behalf of leaders and proofread materials for clarity, completeness, and accuracy

Prepare and send letters as directed

Order, schedule and set up food for luncheons and trainings

Screen all incoming phone calls, inquiries, visitors, and correspondence, and route accordingly

Perform research as needed

Create reports, presentations and meeting minutes as requested

Develop and carry out an efficient documentation and filing system

Coordinate events as necessary

Perform other administrative duties and project work as assigned

Office Services

Greet and assist onsite guests

Order and timely maintain office supply inventory in the building

Identify opportunities for process and office management improvements, and support these improvements

Ensure office policies and procedures are implemented appropriately

Assist with office layout planning and office moves with Corporate Facilities

Place service calls for office equipment and act as the primary point of contact for general office inquiries and building maintenance

Maintain and stock copy room, kitchen and conference rooms in an orderly and timely manner

Ensure a clean and organized office environment

Provide oversight for the safety and security of employees and their property

Manage expense reporting according to internal policies and procedures

Oversee proper maintenance for coffee service, vending machines, cleaning, etc

Liaison with building management company

REQUIRED QUALIFICATIONS

Education/Experience:

At least 3-5 years of experience as a receptionist, office manager or an administrative assistant

High School degree or equivalent required

Knowledge/Skills:

Excellent knowledge of Microsoft Office and Adobe Professional

Ability to work with minimal oversight

Exemplary planning and time management skills

Strong attention to detail and organizational skills

Ability to solve problems, including non-routine issues

Ability to multitask, prioritize daily workload

Establish and maintain cooperative and effective working relationships with others

Excellent written and oral communication skills

Self-motivated and ability to work independently

Complete work with many interruptions

Ability to maintain discretion and keep highly sensitive information confidential

Physical Demands:

Sitting or standing for extended periods of time

Bending at the waist, kneeling or crouching to file materials

Lifting, carrying, pushing or pulling objects up to 25 pounds

Reaching overhead and above shoulders to retrieve supplies

This is a fully onsite role located in St. Louis, Missouri.