Thornton Tomasetti is seeking a proactive and organized Office Assistant to support our Chicago office. This role is ideal for someone who enjoys creating a smooth, welcoming office environment and has a strong can-do attitude. You’ll be at the center of office operations, helping our teams stay efficient and supported. Responsibilities: Answer and monitor the main office line via Microsoft Teams Assist with setup and cleanup for Thornton Tomasetti Events Handle lunch coordination, ordering, and cleanup for office events Manage office supply ordering and vendor communication Maintain a clean, organized, and professional office appearance Provide general administrative support to the Office Manager and Office Directors Requirements: 0–3 years of administrative experience Proficiency in Microsoft Word, Excel, Outlook Strong organization, multitasking, and customer-service mindset