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Lititz, PA — ARRO Consulting, Inc. (ARRO), a trusted provider of engineering, environmental, and consulting services since 1946, is pleased to announce the acquisition of Ott Consulting, Inc., effective January 13, 2026. The acquisition strengthens ARRO’s presence in eastern Pennsylvania and expands its multidisciplinary service offerings for municipal and private sector clients.
Ott Consulting is an engineering firm headquartered in Emmaus, Pennsylvania, providing civil engineering, site development, surveying, and landscape architecture services. Founded in 2003, the firm has served the Lehigh Valley, Slate Belt, and Pocono region for more than two decades, earning a strong reputation for technical excellence, responsiveness, and deep local partnerships. These values closely align with ARRO’s commitment to client-centered service and community impact.
The addition of Ott Consulting enhances ARRO’s ability to better serve public and private clients with a broader range of engineering and design services across the region. Together, the teams are well positioned to support projects from early planning through construction, while maintaining the personalized service clients expect. The acquisition also expands ARRO’s footprint to 12 offices across Pennsylvania and Maryland, strengthening ARRO’s ability to support clients locally and regionally.

 

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