Apex Companies Acquires Water Science Associates

Apex Companies Acquires Forsgren Associates

November 2, 2025

Engineering Services

Apex Companies, LLC has acquired Forsgren Associates, Inc., a multi-discipline civil engineering, environmental sciences, and land surveying firm serving the Intermountain West. The deal adds deep engineering capabilities and expands Apex's operational presence across the Rockies and Pacific Northwest as Forsgren will operate as Forsgren, an Apex Company.

Apex Companies Acquires Environmental Partners

August 2, 2021

Engineering Services

Apex Companies, LLC has acquired Environmental Partners, a Quincy, Massachusetts-based multidisciplinary engineering and consulting firm with more than 80 professionals. The acquisition expands Apex's water, environmental, transportation, civil engineering, and asset management capabilities in New England and will have EP operate as "Environmental Partners, an Apex Company."

Apex Companies Acquires Storm Water Inspection & Maintenance Services (SWIMS)

June 3, 2024

Environmental Services

Apex Companies, LLC has acquired Storm Water Inspection & Maintenance Services, Inc. (SWIMS), a California-based stormwater services firm with more than 100 employees and two offices in Brentwood and San Juan Capistrano. SWIMS will operate as part of Apex’s national stormwater platform, preserving its management team while expanding Apex’s stormwater, erosion control, dewatering, and stormwater construction capabilities in California.

Apex Companies Acquires Johnson Engineering

September 3, 2024

Engineering Services

Apex Companies, LLC has acquired Johnson Engineering, Inc., a Florida-based multidisciplinary civil engineering firm with more than 130 professionals across six offices. The acquisition expands Apex’s engineering and consulting capabilities in Florida; Johnson Engineering will operate as "Johnson Engineering, an Apex Company" with existing management led by Lonnie Howard remaining in place.

Morgan Stanley Capital Partners Acquires Apex Companies from Sentinel Capital Partners

February 1, 2023

Environmental Services

Investment funds managed by Morgan Stanley Capital Partners (MSCP) have acquired Apex Companies, a Rockville, Maryland–based environmental consulting and engineering firm, from Sentinel Capital Partners. Sentinel will retain a minority stake post-closing; financial terms were not disclosed. Apex operates over 1,100 professionals across ~50 offices and provides services in stormwater compliance, water resources, ESG, health & safety, transportation, and civil engineering.

Parsons Corporation Acquires Applied Sciences Consulting, Inc.

October 2, 2025

Infrastructure

Parsons Corporation has acquired Applied Sciences Consulting, Inc., a Tampa-based civil and environmental engineering firm specializing in water and stormwater solutions. The all-cash acquisition expands Parsons' water capabilities and strengthens its presence in Florida, with Applied Sciences integrated into Parsons' North America Infrastructure business unit.