Business Unit Description:
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:

Administrative Support

• Manage calendar and prioritize inquiries and requests, resolve scheduling conflicts, schedule internal and external meetings for the corporate leaders as requested
• Coordinate travel arrangements, prepare itineraries, plan logistics and prepare and submit expense report
• Prepare certain documents on behalf of leaders and ability to 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 general 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:

Education/Experience:

• At least 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 problem solve, 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