Business Details
43 Years
experience
Expert Sanitary Engineering Services in San Diego
Established in 1983, Dexter Wilson Engineering has built a reputation as a trusted leader in sanitary engineering, specializing in water, wastewater, and recycled water systems. Our team delivers comprehensive planning, design, and construction management services to cities, public agencies, and private companies. With decades of collective experience, we prioritize timely project completion, technical excellence, and client-centric solutions tailored to unique infrastructure challenges.Our engineers hold advanced degrees and professional registrations, ensuring adherence to the highest industry standards. We maintain long-term partnerships with clients by combining technical expertise with a commitment to sustainable, future-ready infrastructure. Our work spans master planning, asset management, regulatory compliance, and specialty design projects for critical water systems nationwide.
Services
Wastewater Studies
Water System Design
Pump Station Design
Asset Management Plans
Regulatory Compliance
Pipeline Engineering
Reservoir Design
Hydraulic Calculations
Construction Management
Feasibility Studies
Details
- Year established: 1983
Highlights and features
- We offer over 40 years of experience in sanitary engineering solutions
- Our team includes registered engineers with advanced degrees in civil engineering
- We deliver projects on schedule with proven construction management expertise
- Specialized focus on water/wastewater systems with regulatory compliance expertise
- Proven track record with complex infrastructure projects for major municipalities
Services
Wastewater Studies
We conduct comprehensive wastewater system evaluations including master planning, capacity assessments, and regulatory compliance reviews. Our engineers analyze existing infrastructure, project future needs, and develop capital improvement programs for municipal and private clients. Services include hydraulic modeling, system audits, and long-term planning to ensure efficient wastewater management.
Water System Design
Our team designs complete water distribution systems including pipelines, reservoirs, and pumping stations. We handle projects from raw water intake to delivery systems, ensuring compliance with safety standards and future growth requirements. Services include hydraulic capacity studies, material selection, and integration with existing infrastructure for reliable water supply solutions.
Pump Station Design
We specialize in designing wastewater and water pump stations with capacities ranging from 850 to 40,000 gallons per minute. Our designs incorporate odor control, emergency power systems, and telemetry for remote monitoring. Each project includes mechanical, electrical, and structural components tailored to site-specific conditions and operational requirements.
Asset Management Plans
We develop predictive maintenance programs for wastewater and water systems using condition assessments and lifecycle analysis. Our plans help clients prioritize upgrades, budget for replacements, and maintain regulatory compliance. Services include GIS mapping, failure risk analysis, and financial planning for long-term system sustainability.
Pipeline Engineering
Our engineers design water and wastewater pipelines from 6-inch to 54-inch diameters, including force mains and gravity interceptors. We address complex challenges like highway crossings, seismic considerations, and environmental protections. Projects include material selection, hydraulic modeling, and construction sequencing to minimize service disruptions.
People
Natalie J. Fraschetti
President
Registered Civil Engineer with 20+ years of experience in sanitary engineering. Holds BS in Environmental Engineering from University of Florida. Leads engineering projects and company operations while maintaining technical expertise in water systems.
Andrew M. Oven
Senior Engineer
40+ years of experience in sanitary engineering with MS in Sanitary Engineering from UC Berkeley. Provides technical oversight and mentoring while managing complex infrastructure projects for municipal clients across California.
Dexter S. Wilson
Founder
Established the firm in 1983 with engineering expertise spanning 45+ years. Holds MS in Civil Engineering from University of Arizona. Continues active involvement in major projects while guiding the company's technical direction and client relationships.
Steven J. Henderson
Project Engineer
11+ years of experience in sanitary engineering with BS from Cal Poly Pomona. Specializes in wastewater system design and construction management while maintaining California professional engineering registration.
Fernando Fregoso
Design Engineer
7+ years of experience in water and wastewater system design with BS from Cal Poly Pomona. Focuses on pipeline engineering and pump station design while supporting both public agency and private development projects.
Questions
What engineering services do you specialize in?
We specialize in water supply systems, wastewater infrastructure, recycled water programs, and related civil engineering services for public agencies and private developers.
How long have you served the San Diego region?
We've provided engineering services in San Diego County since our founding in 1983, completing over 40 years of local infrastructure projects.
Do you handle large-scale municipal projects?
Yes, we've completed major projects for cities like Carlsbad, Vista, and San Diego including master plans for systems serving over 100,000 residents.
What makes your firm different from competitors?
Our exclusive focus on water/wastewater systems combined with decades of local experience enables specialized solutions that balance technical excellence with practical implementation.
Can you assist with regulatory compliance?
Yes, we help clients navigate state and federal regulations including preparing required reports and ensuring projects meet all environmental and safety standards.
Do you provide construction phase support?
Yes, we offer comprehensive construction management including bidding assistance, submittal reviews, site visits, and as-built documentation for project completion.
