NTM Engineering, Inc.

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Jeffrey MacKay, MS, PE, CPESC

Jeff is the vice president of NTM’s Stormwater & Civil Site Division. He has over 24 years of engineering experience. His background features transportation and land development projects, with an emphasis on stormwater management, hydrologic and hydraulic (H&H) studies, and erosion and sediment (E&S) control. Jeff’s water resources experience includes a combination of research, instruction, and engineering. He has completed H&H studies for Pennsylvania and New York transportation projects and provides PennDOT training on water resources topics within the context of design manual procedures. He is also the author of PennDOT’s first comprehensive Stormwater Management Policy and assisted in developing PennDOT’s Drainage Manual. At NTM, Jeff designs stormwater and drainage systems, conducts and reviews H&H studies, prepares and reviews erosion and sediment control plans, prepares NPDES and waterway permits, and advises PennDOT’s Bureau of Project Delivery on related issues.

Jeff is a member of the Transportation Research Board Hydrology, Hydraulics, and Water Quality Committee and is the lead developer/instructor for the School of Professional Engineering Exam Review Course on water resources/environmental.

Jeff earned his BS and MS degrees in Civil Engineering from Drexel University. He holds professional engineering licenses in Pennsylvania, Maryland, and New York. He is also a Certified PennDOT Instructor and a Certified Professional in Erosion and Sediment Control.

NTM News

NTM Engineering Announces New Leadership Reorganization

April 9, 2025, Dillsburg, PA — NTM Engineering, Inc. (NTM) is proud to announce new leadership shifts in our Wayne office and environmental division. … [Read More]

NTM Welcomes Lotfaliani to Hydrology & Hydraulics

We are pleased to welcome Shirin Lotfaliani, MS to our Hydrology & Hydraulics Division! Shirin joined NTM on March 18, 2025, as a Designer. She … [Read More]

Slovikosky Promoted to Design Engineer

Congratulations to Debbie Slovikosky for recently earning her Professional Engineer (PE) license and for being promoted to Design Engineer! Debbie … [Read More]

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Stormwater & Civil/Site Senior Engineer

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Stormwater & Civil/Site Project Manager

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Stormwater & Civil/Site Designer

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NTM Engineering, Inc.
130 West Church Street, Suite 200
Dillsburg, PA 17019-1278
Phone: (717) 432-4425
Fax: (717) 432-4426

State College Office
341 Science Park Road, Suite 203
State College, PA 16803
Phone: (814) 862-9191

Philadelphia Office
30 North 41st Street, Suite 520
Philadelphia, PA 19104
Phone: (215) 397-4055

Wayne Office
435 Devon Park Drive
Building 800, Suite 803
Wayne, PA 19087
Phone: (610) 605-3104

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