A Delaware-based engineering and design firm has bought MHF Design Consultants, a 24-person civil engineering and surveying firm based in Salem.

The MHF engineers and surveyors will join Greenman-Pedersen Inc.’s (GPI) multi-disciplinary engineering team of over 1,500. MHF’s staff provide a comprehensive range of civil engineering and land surveying services relative to understanding the land and environment as a means of achieving development of the highest quality.

“MHF’s experience allows GPI to continue to grow geographically while providing diversification in the depth of services that we provide in New England,” GPI Executive Vice President Tim Letton said in a statement.

“This merger brings additional depth and strength to MHF’s ability to serve our clients and continue our long-term relationships,” MHF Principal Engineer, Frank C. Monteiro said in a statement.

Monteiro and fellow MHF Principal Engineer Mark Gross will join the GPI senior management team. Gross will become GPI New England’s director of land development – permitting; Monteiro will become GPI New England’s director of land development – engineering and GPI New England’s current Director of Land Development Heather Monticup will become director of land development – traffic.