Donald M. Hemphill, P.E. Civil Engineer & Land Development Expert

Professional Experience

Provide technical investigations, analysis, reports, and testimony toward the resolution of commercial claims and personal injury litigation involving civil engineering, subdivision/site developments, platting, property acquisitions, land planning and zoning, feasibility analysis, drainage systems, flooding, stormwater detention, Federal Emergency Management Agency (FEMA) FIRM/LOMR, erosion control measures, National Pollutant Discharge Elimination System (NPDES) SWPPP, infrastructure, roadways, water distribution, wastewater collection, water/wastewater treatment facilities, pump stations, dry utilities, recreation facilities, parks, bike trails, lighting, pedestrian safety, parking lot design, traffic control signage, Manual on Uniform Traffic Control Devices (MUTCD), pedestrian/bike paths, Americans with Disabilities Act (ADA) site requirements, due diligence, entitlements, design/risk management, project/program management, construction scheduling, cost estimating, value engineering, delay claims, change order analysis, permitting, development agreements, construction contracts & practices, design-build, earthwork and grading, excavation, embankment construction, detention/retention pond design/construction, compaction, trench safety inspection, pipe laying, construction inspection and commissioning.

Multidiscipline consulting firm providing civil engineering, geotechnical, environmental, GIS, and other services. Managed civil engineering projects including: residential subdivisions, commercial site developments, planning and zoning, platting, master planning, utility infrastructure improvements, state highway acceleration/deceleration lanes, commercial driveway connections to state highways, site clearing, excavation, earthwork grading, storm water management, FEMA FIRM/LOMR, flood prevention, erosion control measures, NPDES SWPPP, water supply/treatment, wastewater collection/treatment, pump station, roadways, parking lots, traffic control, pedestrian safety, ADA site requirements, recreation facilities, due diligence, entitlements, design/risk management, value engineering, delay claims, change order analysis, project/program management, scheduling, cost estimating, value engineering, delay claims, change orders, development agreements, and construction contracts.

Multidiscipline consulting engineering and land surveying firm providing services for public and private sectors. Provided project management, civil engineering design, permitting, and construction support services for two master planned communities, including public infrastructure improvements to support a new children’s hospital.

Work included: NPDES SWPPP, erosion control measures, earthwork and grading, drainage systems, flood prevention, water supply, wastewater collection, dry utilities, roadways, pedestrian sidewalks, ADA ramps, traffic control, Texas Department of Transportation (TxDOT) coordination/permitting, MUTCD, existing gas lines, project management, construction contracts, inspections and commissioning.

Civil/structural consulting engineering and land surveying firm. Provided project management, civil engineering design, permitting, and construction support services to universities, and architectural and commercial clients.

Projects included: new-build and redevelopments; including private access roads, parking lots, university buildings, soccer facility and fields, K-12 schools, hospital additions, libraries, warehouses, and other use building sites. NPDES SWPPP, erosion control measures, earthwork and grading, drainage systems, flood prevention, water supply, dry utilities, pedestrian safety/travel routes, ADA ramps, lighting, permitting, MUTCD, project management, inspections,
and commissioning.

Developer of high-density boutique single and multifamily developments in Texas. Provided civil engineering services as an employee of the developer, facilitating the construction of single-family residential subdivisions and homes, including multifamily units.

Work included: feasibility analysis, property acquisitions, land planning and zoning, NPDES SWPPP, erosion control measures, earthwork and grading, drainage systems, water supply, wastewater collection, dry utilities, roadways, pedestrian sidewalks, ADA ramps, traffic control, MUTCD, design management, permitting, construction contracts, construction inspection, and support services during vertical construction.

Worked as a city employee in the land development department reviewing/approving design submittals and performing inspections of construction activities related to master planned single family residential developments with public parks and amenities.

Work included: permitting, design reviews, flood prevention, coordination with developers/contractors, support to the planning department, field inspections, and acceptance of assets for handover to the city infrastructure department. Erosion control measures, roadways, recreation facilities, lighting, pedestrian safety, traffic control.

Senior Civil Engineer (Perth, Western Australia, AUS) 2011-2014

Performed civil design services on mining and oil & gas projects.

• Worked as a civil engineer on the design of a new iron ore processing facility in the Pilbara.
• Worked as the utilities facilitator on an alliance project consisting of three consulting firms, two contractors, and the Main Roads authority to construct fly overs and ramps connecting the Perth Airport to freight corridors and public freeways.
• Served as the point of contact for the Water Corporation for all matters to process requests from the project designers and contractor team.

Work included: property acquisition, demolition, design & permitting, public notices/outreach, construction support, field inspections, water distribution, wastewater collection, drainage systems, flood prevention, earthwork grading, utility corridors, training in construction safety, commissioning.

Engineer-Technical Services Department (Tripoli, Libya) 2009-2011

AECOM provided program management services for a national housing and infrastructure development/redevelopment program. Performed site visits to existing treatment plants, existing communities, and project locations nationwide.

Work included: sewage treatment plant evaluations of existing facilities, design reviews for modified and new treatment plants, bid reviews and recommendations, and construction inspection. Review of design submittals for new community and redevelopment projects, including infrastructure, roadways, water distribution, wastewater collection, wastewater treatment facilities, pump stations, dry utilities, drainage systems, flood prevention, program management, and field inspections.

Project Manager/Consultant (Peoria, IL) 2005-2009

Performed numerous consulting engineering services for private and public clients.

Managed projects including: Residential subdivisions, commercial subdivisions, utility infrastructure improvements, and site development of multifamily units, banks, hotels, office buildings, a car dealership, and other site uses.

• Served as project manager on a design-build project that was constructed for a new Illinois Air National Guard training facility with offsite infrastructure.
• Work included civil engineering design, platting, drainage systems, flood prevention, storm water management, infrastructure, roadways, water distribution, wastewater collection, dry utilities, bike trails, baseball fields, pedestrian safety, parking lot design, traffic control signage, MUTCD, ADA, project management, cost estimating, change order analysis, permitting, construction contracts, design-build, earthwork and grading, excavation, embankment construction, compaction, detention/retention pond design/construction, trench safety inspection, pipe laying, construction inspection and commissioning.

Land surveying and consulting engineering firm.

• Prepared civil engineering designs for commercial site development and residential subdivision.
• Performed construction inspection services of water supply infrastructure.
• Supported land surveyors with field work and preparation of plats and topographic surveys.

Consulting engineering and land surveying firm with emphasis on single-family residential development. Prepared civil engineering designs, permitting, and performed construction support services for numerous residential subdivisions; including coordination with in-house land surveyors for boundary, topographic surveys, platting, and construction staking.

Work included: land planning and zoning, feasibility analysis, drainage systems, flood prevention, stormwater detention, FEMA FIRM/LOMR, erosion control measures, NPDES SWPPP, infrastructure, roadways, water distribution, wastewater collection, pump stations, dry utilities, traffic control signage, entitlements, cost estimating, value engineering, change order analysis, permitting, earthwork and grading, excavation, embankment construction, compaction, detention/retention pond design/construction, trench safety inspection, pipe laying, construction inspection and commissioning.

Multidiscipline consulting engineering, environmental, and land surveying firm. Responsible for civil engineering design and construction support services of single-family residential subdivisions, commercial site development, and infrastructure projects for public and private sector clients.

Projects included: municipal wastewater treatment plant, restaurants, and other commercial site developments.

• Coordinated with in-house land surveyors for boundary, topographic surveys, platting, and construction staking.
• Property acquisitions, land planning and zoning, feasibility analysis, drainage systems, flood prevention, stormwater detention, FEMA FIRM/LOMR, erosion control measures, NPDES SWPPP, infrastructure, roadways, water distribution, wastewater collection, pump stations, dry utilities, bike trails, pedestrian paths and safety, ADA, parking lots, traffic control signage, MUTCD, permitting, earthwork and grading, excavation, embankment construction, compaction, detention/retention pond design/construction, trench safety inspection, pipe laying, construction inspection, and commissioning.

Multidiscipline engineering, environmental, and land surveying consulting firm.

• Prepared civil engineering design documents, performed field work, and construction support services for infrastructure projects including, underground storage tanks, water treatment plants, and a city storm sewer trunk main.

Work included: topographic surveys, drainage systems, flood prevention, erosion control measures, NPDES SWPPP, infrastructure, demolition, trench safety inspection, pipe laying, excavation, construction inspection and commissioning. Worked with in-house land surveyors for boundary and topographic surveys.

Professional Credentials

Registered Professional Engineer: Arizona, Colorado, Connecticut, Florida, Georgia, Illinois, Louisiana, Mississippi, Nevada, New Jersey, New Mexico, New York, North Carolina, Ohio, Oklahoma, Pennsylvania, South Carolina, Texas, Utah, Washington

Education

B.S., Civil Engineering, University of Iowa

Continuing Education

• Funding Resources: Lead Service Line Replacement and Emerging Contaminants, U.S. Environmental Protection Agency, 2025
• Professional Engineering & Surveying Practice Update/Ethics, Texas Board of Professional Engineers and Land Surveyors, 2025
• AI in Disaster Preparedness, Response, and Recovery, U.S. Environmental Protection Agency, 2025
• IH-30 Canyon & Major Projects Update, American Society of Civil Engineers Dallas Branch, 2025
• Old Iron Bridge Rehabilitation, American Society of Civil Engineers Dallas Branch, 2025
• Introduction to Probabilistic Cost Estimating, Langan Engineering & Environmental Services, 2025
• Engineering Observations During Construction, Part 1, Langan Engineering & Environmental Services, 2025
• PFAS and Other Contaminants of Emerging Concern, Langan Engineering & Environmental Services, 2025
• Site Planning and Design, Langan Engineering & Environmental Services, 2025
• Vapor Intrusion, Langan Engineering & Environmental Services, 2025
• Land Development Workshop Part 1, Langan Engineering & Environmental Services, 2025
• Keep Your Head Above Stormwater: Management Design Fundamentals, Langan Engineering & Environmental Services, 2025
• Floodplain Management, Langan Engineering & Environmental Services, 2025
• Leveraging Stormwater Modeling to Prepare and Recover from Emergencies, U.S. Environmental Protection Agency, 2025
• Stormwater Management Presentation, Storm Trap (vendor), 2025
• Existing Conditions: Analysis and Data, Langan Engineering & Environmental Services, 2025
• Ecological and Sediment Remedial Investigations and Remediation, Langan Engineering & Environmental Services, 2025
• Drilling and Monitoring Well Installation, Langan Engineering & Environmental Services, 2025
• PFAS In Our World: Chemistry and Forensics of PFAS in Practice, Langan Engineering & Environmental Services, 2025
• Constructability: Details Matter, Langan Engineering & Environmental Services, 2025
• Management of Contaminated Soils, Langan Engineering & Environmental Services, 2025
• Essential Waste Management and Compliance, Langan Engineering & Environmental Services, 2025
• Foundation Selection and Design Fundamentals, Langan Engineering & Environmental Services, 2025
• PFAS Measurement Workshop: Understanding and Applying the PFAS Analytical Methods, Langan Engineering & Environmental Services, 2025
• Resilience, Ecology, and Access at the Water’s Edge: Waterfront Edge Design Guidelines, Langan Engineering & Environmental Services, 2025
• Understanding PCBs Part I - Remediation Waste, Langan Engineering & Environmental Services, 2024
• Ethics Unpacked: Insights Through Compelling Case Studies, Langan Engineering & Environmental Services, 2024
• PADEP “Act 2” Land Recycling Program Introduction, Langan Engineering & Environmental Services, 2024
• Cellular Concrete Lightweight Fill: Settlement Prevention with Cellular Concrete, Langan Engineering & Environmental Services, 2024
• Bringing Battelle to the Staff Part II, Langan Engineering & Environmental Services, 2024
• Bringing Battelle to the Staff Part I, Langan Engineering & Environmental Services, 2024
• Engineering of Dams: Challenges and Opportunities, Langan Engineering & Environmental Services, 2024
• PART V: PFAS In Our World: Waste/Fill Management, Permitting/Compliance & Technical Considerations, Langan Engineering & Environmental Services, 2024

Professional Memberships

• National Society of Professional Engineers (NSPE)
• American Society of Civil Engineers (ASCE), Texas Section-Dallas Branch
• Utility Engineering and Surveying Institute (UESI)

v. 05/6/26