When progress demands experience, that’s where we come in. Yoh is in the business of moving things forward: projects, people, and possibility, delivering the expertise, methodology, and momentum that keep work moving. From consulting and staffing to enterprise workforce solutions, we bring the expertise to move your business ahead, today and for decades to come. Everything’s aligned and integrated to client needs. If it’s powered by science, built by engineers, or driven by data, Yoh is there, embedded in the workforce solutions that move industries ahead. We partner with innovators and problem-solvers who are transforming the marketplace from the inside out. By combining domain expertise with delivery discipline, we turn complex ideas into measurable outcomes. Nearly a century after our founding, Yoh remains STEM-centered, values-charged, and fully focused on improving business operations and outcomes. Yoh works wherever progress moves fast, with: industries defined by innovation, compliance, and transformation. Our flexible, scalable approach helps the world's best and brightest companies deliver impact. Yoh is a proud member of the Day & Zimmermann family of companies.
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The Yoh, A Day & Zimmermann Company annual revenue was $68.8 million in 2026.
John Comito is the President of Yoh, A Day & Zimmermann Company.
1,234 people are employed at Yoh, A Day & Zimmermann Company.
Yoh, A Day & Zimmermann Company is based in Philadelphia, Pennsylvania.
The NAICS codes for Yoh, A Day & Zimmermann Company are [561, 56].
The SIC codes for Yoh, A Day & Zimmermann Company are [736, 73].