---
title: 'Associate Invoice Reconciliations (Media) at Critical Mass'
canonical: 'https://feeny.ai/job/associate-invoice-reconciliations-media-critical-mass-san-jose-tbv0f6fwpyjd'
type: 'job'
last_seen: '2026-11-06'
---

# Associate Invoice Reconciliations (Media) at Critical Mass

- **Company:** Critical Mass
- **Location:** San Jose, CA
- **Posted:** 2026-09-23
- **Last confirmed live:** 2026-11-06
- **Apply:** https://job-boards.greenhouse.io/criticalmass/jobs/8114082

## Job description

Join Critical Mass as our Associate Invoice Reconciliations (Media) with a focus on media billing. In this role, you will play a vital part in supporting our media investment team, ensuring accurate and timely invoicing for our clients, and maintaining meticulous records of media budgets and vendor transactions. If you have a passion for media and finance, exceptional attention to detail, and thrive in a dynamic environment, we invite you to apply and become an integral part of our team.

The ideal candidate should be comfortable working in alignment with Eastern Time (ET).

You Will:

- Maintain oversight of client media budgets and requirements and develop and communicate media billing schedules
- Review and audit Media Authorization Forms alongside related vendor invoices.
- Provide support for SOX Testing, including documentation and assistance with selected samples
- Reconcile client billing and vendor invoices within the finance system
- Manage supporting backup documentation for month-end reconciliation
- Prepare ad hoc reports as necessary for internal and external purposes
- Coordinate campaign timelines and provide operational support to the investment team throughout campaign activation, including actualization and vendor invoice reconciliation.
- Assist with campaign setup, buy entry, and ongoing maintenance, ensuring all inputs align with client-approved budgets and Media Authorization Forms (MAFs).
- Collaborate with internal teams to deliver accurate status updates for billing purposes.
- Contribute to process improvement initiatives and support automation efforts to enhance efficiency in client and campaign deliverables.

You Have:

- Diploma or degree with a focus on accounting, finance, marketing, media, or a related field.
- 0–2 years of experience in accounting, finance, media operations, or a related environment.
- Strong accounting knowledge complemented by solid technical and analytical skills.
- Strong Excel skills, including the ability to work confidently with formulas, lookups, pivot tables, and data sets.
- Proficiency in Microsoft Office Suite, including Excel, Word, and Outlook.
- Familiarity with foreign currency transactions.
- Experience with Mediaocean, Prisma, or other media planning, buying, or financial management tools is a plus.
- Exceptional attention to detail and a high level of accuracy when handling financial, campaign, and billing data.
- Excellent written and verbal communication skills.
- Strong organizational skills and the ability to manage multiple priorities and deadlines.
- Ability to adapt and thrive in a fast-paced, dynamic environment.
- Self-motivated and capable of working independently with minimal supervision.

## What We Offer

- Maternity and parental leave extra days
- Competitive benefits packages
- Vacation, compassionate leave, sick days, and flex days
- Access to online services for families and new parents
- Diversity and Inclusion Board with 12 affinity groups
- Internal learning and development programs
- Enterprise-wide employee discounts
- And more…

At Critical Mass, we value our employees and offer competitive compensation and benefits packages. If you’re looking for a challenging and rewarding opportunity to make a significant impact on the lives of our employees, we encourage you to apply for this exciting position today!

The Talent Team at Critical Mass is focused on ensuring we provide the best training, onboarding, and employee experience possible! Our new hires & employees are the future of our organization, and we want to set you up for long-term success. In an effort to do so, we expect our team to work from an office a minimum of 3 days a week.

The Ask Stems From Our Want To

Strengthen opportunity for continuous learning

Improve collaboration and team relationships.

Increase employee engagement

This work model balances the need for individual flexibility while maintaining the relentless customer focus we provide at CM. We understand that not everyone may feel comfortable with this expectation, so we ask that you please let us know immediately if there are any concerns so we can help navigate accordingly.

Critical Mass is an equal opportunity employer.

Critical Mass uses artificial intelligence in our recruitment process to enhance job postings, filter keywords during the review of prospective candidates, and, in some cases, transcribe interviews with our recruiters. Human review remains central to the process, and all hiring decisions are ultimately made by our team.

The Critical Mass Talent Acquisition team will only communicate from email addresses that use the URLs criticalmass.com, omc.com and us.greenhouse-mail.io. We will not use apps such as Facebook Messenger, WhatsApp, or Google Hangouts for communicating with you. We will never ask you to send us money, technology, or anything else to work for our company. If you believe you are the victim of a scam, please review your local government consumer protections guidance and reach out to them directly.

If U.S. based: https://www.consumer.ftc.gov/articles/job-scams#avoid If Canada based: https://www.canada.ca/en/services/finance/consumer-affairs.html If U.K. based: https://www.gov.uk/consumer-protection-rights If Costa Rica based: https://www.consumo.go.cr/educacion_consumidor/consejos_practicos.aspx

## About Critical Mass

## Company Overview
- **One-liner**: Critical Mass is a digital experience design agency that creates connected digital ecosystems for global brands through design, technology, data, and AI.
- **Entity Type**: Private (subsidiary of Omnicom Group Inc., a publicly traded holding company)
- **Headquarters**: Calgary, Alberta, Canada
- **Founded**: 1996
- **Founders**: Not publicly available

## Core Business
- **Primary industry**: Advertising Services / Digital Experience Design & Marketing
- **Target customers**: B2B, Enterprise (serves globally renowned brands such as Apple, Adobe, BMW, Nike, Diageo, Airbnb, and BNY)
- **Mission or purpose statement**: “We create connected digital ecosystems through design and technology” – powering brand differentiation with performance driven by data, technology, AI, creative, and media.

## Products & Services
- **Intelligence & Insights**: Data-driven research and analytics to uncover customer behavior and market opportunities.
- **Brand & Creative**: Strategy, visual identity, and storytelling across digital and traditional channels.
- **Experience Design**: User experience (UX) and interface design for web, mobile, and connected products.
- **CRM & Loyalty**: Customer relationship management programs and loyalty platform design.
- **Social**: Social media strategy, content creation, and community management.
- **Technology**: Custom software development, platform engineering, and system integration.
- **Data & AI**: Advanced analytics, machine learning models, and AI-powered personalization.
- **Performance Marketing**: Paid search, social advertising, and programmatic media buying.
- **Media**: Media planning, buying, and optimization across channels.
- **Automation**: Marketing automation and workflow orchestration solutions.

## Market Standing
- **Valuation/Market Cap**: Not disclosed (subsidiary of Omnicom Group Inc.)
- **Key Metric**: Annual Revenue of $300M (2024‑2025 data)
- **Notable Investors/Partners**: Parent company Omnicom Group Inc. (NYSE: OMC); key clients include Apple, Adobe, BMW, Nike, Diageo, Airbnb, BNY Mellon.
- **Growth Signals**: Headcount of ~1,448 employees (LinkedIn, 2025) with +6.9% YoY growth; 12–14 offices across North America, Europe, Latin America, and Asia; award wins – Fast Company’s 100 Best Workplaces for Innovators, Digiday’s Most Innovative Agency; in-house development program for emerging talent (no experience required).

## Competitive Advantages
- **Global footprint** with offices in 13+ countries enabling cross‑market campaigns.
- **Award‑winning creative and technical capabilities** recognized by industry peers.
- **Deep client relationships** with iconic brands across multiple verticals (tech, auto, luxury, finance).
- **In‑house development program** for emerging talent, lowering the barrier to entry and building a pipeline of skilled practitioners.
- Culture described as “big talent and tiny egos,” emphasizing collaboration and low politics.

## Strategic Focus
- Continued investment in **AI, data, and automation** to deliver connected ecosystems that drive measurable performance.
- Expanding **media and performance marketing** capabilities alongside traditional creative and design.
- Growing **global delivery network** (e.g., Costa Rica, Colombia, Japan) to offer cost‑effective scale.
- Nurturing **emerging talent** through internal programs to sustain a pipeline of digital‑first creators.

## Why Work Here
- **Culture**: “The people make the place” – a collaborative, low‑ego environment that attracts “digitally‑minded creative folks.” Fast Company named it one of the 100 Best Workplaces for Innovators.
- **Work policy**: In‑office (based on Built In profile and office‑centric job postings); 12 global offices (Vancouver, Calgary, Toronto, New York, Chicago, Los Angeles, London, São Paulo, Tokyo, San José, etc.).
- **Notable perks**: In‑house development program for emerging talent (“No experience required”); opportunities to work with world‑class brands; “equal parts laughter and resolve” in team culture.
- **Engineering/creative culture**: Cross‑functional teams (strategy, design, technology, media) with a flat hierarchy; employees report high autonomy on projects.

## Sources
1. [criticalmass.com](https://www.criticalmass.com/)
2. [criticalmass.com/jobs](https://www.criticalmass.com/jobs)
3. [linkedin.com/company/critical-mass](https://www.linkedin.com/company/critical-mass)
4. [builtin.com/company/critical-mass](https://builtin.com/company/critical-mass)
5. [job-boards.greenhouse.io/criticalmass](http://job-boards.greenhouse.io/criticalmass)

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