Assistant Buyer, Integrated Media Investment

Crossmedia is a global media independent agency committed to transparency and innovative connections between brands and people. The Assistant Buyer will manage day-to-day responsibilities of paid media campaign management, supporting the execution, maintenance, and reporting of media buys across traditional and digital channels. Responsibilities Assist in the preparation of media authorizations and insertion orders to activate buys Enter campaign data and maintain accurate records across internal systems (e.g., OneStrata, Investment Trackers) Help manage timelines and deliverables, ensuring vendors receive specs and assets on time Monitor campaign pacing and delivery, flagging any under- or over-delivery to the team Compile weekly and monthly campaign performance reports, pulling data from media partners, platforms, and internal dashboards Analyze delivery vs. planned metrics and assist in optimization recommendations Help create and update post-buy analyses for client presentations Track billing and work with finance teams to resolve discrepancies or reconcile vendor invoices Maintain budget trackers and assist in updating actuals vs. planned spend Organize documentation including contracts, screenshots, and proof of performance Communicate directly with vendors to confirm buys, gather reporting data, and resolve execution issues Attend vendor meetings and take notes to assist the broader team in evaluating new opportunities Attend and note take during team meetings, client briefings, and status calls as appropriate Participate in training sessions to deepen knowledge of media buying systems, analytics tools, and the media landscape Stay informed on media industry trends, competitive campaigns, and emerging platforms Skills Bachelor's in Advertising, Marketing or related field A very high proficiency with Microsoft Office Suite: Excel, PowerPoint, Outlook Strong attention to detail and highly organized Must have a love for numbers and numerical aptitude Excellent communication skills Eagerness to learn and adaptability A strong interest and knowledge of Media Buying and Planning Previous marketing, advertising or media agency experience are a plus Benefits Flexibility to work in hybrid manner with in-office and work from home options (depending on role). Open/Flexible PTO with US & UK specific policies Sponsored healthcare options and agency-wide physical & mental health support 401k with company match (USA), and generous Pension (UK) Paid sabbatical at significant milestone anniversaries Generous paid parental leave policy Life milestone recognition & support The Pursuit of Happiness Fund devoted to helping Crossmedians find their happy (be it travel, enrichment class, fitness membership or professional development) Cell phone/tech reimbursement Student Loan payment plan (US) Tuition reimbursement Learning & Development and training programs And burgers – lots and lots of burgers Company Overview Crossmedia, Inc. is an independent minority-owned New York City-based communications planning and media services agency. It was founded in 2000, and is headquartered in New York, New York, USA, with a workforce of 201-500 employees. Its website is