GHK Capital-Backed WSB Announces Acquisition of Alta Science & Engineering

Alta Strengthens WSB’s Environmental and Scientific Capabilities

MINNEAPOLIS--(BUSINESS WIRE)--WSB LLC (“WSB”), one of the nation’s fastest‑growing design and consulting firms, today announced the acquisition of Alta Science & Engineering, Inc. (“Alta”), a well‑established science and engineering firm with more than 35 years of experience delivering environmental and infrastructure solutions across the western United States. WSB is a portfolio company of GHK Capital Partners LP (“GHK”), a leading middle-market private equity firm based in Greenwich, CT.

The acquisition of Alta strengthens WSB’s environmental and natural systems platform, expanding the firm’s ability to support public‑ and private‑sector clients facing complex environmental, regulatory, and infrastructure challenges. Alta brings deep expertise in environmental services, remediation and brownfields, site characterization and compliance, ecosystems and restoration, water resources, civil engineering, and data management and visualization.

“The acquisition of Alta Science & Engineering represents a strategic investment in the continued growth of WSB’s environmental capabilities,” said Bret Weiss, WSB’s president and chief executive officer. “Alta is widely respected for its scientific excellence, thoughtful problem‑solving, and people‑first culture. Their expertise complements our existing services and strengthens our ability to deliver integrated, science‑based solutions for our clients. Just as important, our two firms share a common set of values-collaboration, integrity, and a commitment to making a positive impact on communities. We are very happy to be entering the Pacific Northwest with this long-standing, successful organization.”

Alta has more than 60 employees and operates from four offices located in Idaho and Washington. With this acquisition, WSB continues to expand its multidisciplinary team while strengthening its presence in key environmental and natural resource markets. Today, WSB operates from more than 50 offices with approximately 1,700 employees nationwide, serving clients across government, commercial, and infrastructure markets.

“Joining WSB marks an exciting next chapter for Alta Science & Engineering,” said Derek Forseth, chief executive officer of Alta. “From the beginning, Alta has believed that quality science and engineering-guided by strong human values-can make a meaningful difference. Partnering with WSB allows us to build on that foundation while offering our clients access to broader resources and integrated expertise. For our staff, this partnership creates new opportunities for growth, collaboration, and long‑term career development within a like‑minded organization.”

WSB and Alta will work together to integrate their services and develop a coordinated go‑to‑market approach in 2026. This marks WSB’s seventh acquisition in three years and further expands WSB’s expertise across environmental services, remediation, water resources, ecosystem restoration, and project management.

Morrissey Goodale, a specialized management consulting and research firm exclusively serving the architecture, engineering, and environmental consulting industries, initiated the transaction and advised Alta Science & Engineering, Inc.

About WSB

WSB is a forward-thinking design and consulting firm specializing in engineering, community planning, environmental, and construction services. Its staff improves the way people engage with communities, transportation, infrastructure, and the environment. WSB integrates planning, design, and implementation to support clients nationwide. Guided by a strong vision and an authentic passion, WSB strives to look beyond today and capitalize on the opportunities of tomorrow. To learn more, visit wsbeng.com.

About GHK Capital Partners LP

GHK is a leading middle-market private equity firm focused on making control investments in industrial companies across North America. For more information about GHK please visit www.ghk.com.

About Alta Science & Engineering

Alta Science & Engineering is a Northwest‑based science and engineering firm with more than 35 years of experience delivering environmental and infrastructure solutions. Alta provides services including environmental services, remediation and brownfields, ecosystem restoration, site characterization and compliance, water resources, civil engineering, and data management. The firm is known for its science‑based approach, collaborative culture, and commitment to helping clients make informed decisions that benefit communities and the environment.