Design/Build

From a fast-track tenant fit-out to an $8 million cogeneration facility, Walton has the Mechanical Engineering expertise to provide our customers a complete project within budget constraints and schedule requirements. Utilizing a Design/Build approach to the installation of your mechanical systems, Walton’s staff of Professional Engineers, Mechanical Designers, and CAD Draftsmen will work with you to customize your HVAC, Plumbing, and Process Piping projects ensuring a complete design along with proper coordination in the field with Walton’s Construction Services Group. Changes to the scope can be accomplished seamlessly “in-house,” eliminating schedule delays and impact costs. Licensed in Pennsylvania, Maryland, Delaware and West Virginia, Walton can also provide computerized energy usage calculations and return on investment (ROI) analysis, green and alternative energy designs and LEED certification, Internet-based DDC automatic temperature control systems, and AutoCAD drawings that will assist in the coordination of other trades work including electrical and fire protection.

Facets of Design/Build

Collaborative Planning & Engineering
With in-house or partnered engineering teams, mechanical contractors engage early in the project. This allows them to provide expert input, ensure feasibility, and align design with installation best practices.

Value Engineering
Design/Build supports continuous value analysis. Contractors can suggest cost-effective alternatives, materials, and designs that improve system performance while keeping the budget in check.

Streamlined Communication & Accountability
Owners benefit from a single point of contact, reducing friction and miscommunication between designer and builder. Accountability is clear, which minimizes delays and disputes.

Cost & Schedule Control
By integrating design and construction, project budgets are established early. Contractors can plan phases in advance, helping to fast-track construction and avoid change orders.

Constructability Reviews
During the design phase, experienced construction teams review the plans to ensure they are buildable, safe, and efficient. This reduces costly revisions later in the process.

Prefabrication & Modular Integration
Mechanical systems can be designed with prefabrication in mind, allowing for assembly in controlled environments. This saves time on site, improves safety, and enhances quality.

BIM & VDC Utilization
Building Information Modeling (BIM) and Virtual Design & Construction (VDC) are critical tools in Design/Build. They help coordinate systems, detect clashes, and support facility management after completion.

Commissioning & Turnover Support
Design/Build teams stay involved through testing and balancing, controls coordination, and documentation handoff. This ensures systems perform as intended on day one.

Post-Construction Support
Many contractors offer service and maintenance agreements, with access to as-builts and O&M documentation. Long-term support is a key benefit of the Design/Build relationship.


Design/Build is more than a method—it's a mindset that brings together innovation, collaboration, and execution. It's how modern mechanical contractors deliver smarter, more efficient buildings.

How a Complete Design/Build Department Helps Customers

Single Source of Responsibility
With one team handling both the design and installation of mechanical systems, there’s no confusion about who’s accountable. This eliminates finger-pointing and accelerates problem-solving.

Faster Project Delivery
Design and construction happen concurrently instead of sequentially. This reduces overall project timelines and allows for fast-tracking when needed—ideal for time-sensitive builds or renovations.

Cost Predictability & Budget Control
The in-house team can lock in accurate budgets early in the process with less risk of change orders. They’re building to their own designs, which cuts out costly interpretation errors.

Design That Works in the Field
Designers collaborate with field experts from day one, ensuring that what’s drawn on paper can be built efficiently and cost-effectively. You get practical, constructible solutions—not just theoretical ones.

Enhanced Collaboration
The Design/Build model fosters a team mindset. Everyone—engineers, estimators, project managers, and foremen—works toward the same goal, improving transparency and project harmony.

Prefabrication Opportunities
Having the design in-house allows for systems to be created with prefabrication in mind—saving time, improving safety, and delivering higher quality control.

Improved System Performance
Mechanical contractors who design their own systems are more likely to focus on efficiency, serviceability, and long-term performance. They build with operations in mind, not just code compliance.

Early Value Engineering
Contractors can suggest better materials, routing options, or energy-saving systems from the beginning—before the design is finalized—so you benefit from smarter decisions upfront.

Reduced Risk
With less dependence on third-party consultants, there’s less chance of miscommunication, coordination errors, or incompatible systems. The team owns both the vision and execution.

 

 

Mark Schnupp

Mechanical Design Engineer

717.755.9030


Department: Engineering
Years of Experience: 9+
Market Expertise: Commercial, Industrial, and Institutional Plumbing and HVAC
Service Expertise: HVAC and Plumbing system design and coordination
License(s): Engineer in Training
Name 3 Projects You are Most Proud of: Evapco East Expansion & Renovation, UPS Middletown and 1110 East Princess Street
Education: BS in Mechanical Engineering Technology from Penn State University
AAS in Mechanical Engineering Technology from Thaddeus Stevens College of Technology
What are your Strengths: I always try to put myself in the shoes of others and try to understand their perspectives to serve my teams and customers better by increasing my understanding of the whole picture.

Jeff Clark

Mechanical Design Engineer

717.755.9030


Department: Design/ Estimating
Years of Experience: 40
Market Expertise: HVAC Sales/ Service/ Maintenance and Design
Service Expertise: Controls and Mechanical
License(s): Certs - Electrical/ Controls and Commissioning
Name 3 Projects You are Most Proud of: CVSD Poolpak Replacement/ Philadelphia University Commons/ Kinsley Engineering Building, York College
Education: HS + Technical Community College
What are your Strengths: Sales/ Service/ Project Management and client relations

Donald Ryan

Mechanical Design Engineer

717.755.9030


Department: Design/Estimating
Years of Experience: 34 years
Market Expertise: 30+ years in sales
Name 3 Projects You are Most Proud of: 1.7 million sqft Proctor Gamble Warehouse near Shippensburg, PA; domestic water portion of the new Hershey factory in Hershey, PA; Koch Dealerships in Allentown, PA
Education: Attended Moravian College in Bethlehem, PA; attended Shippensburg University for Mathematics
What are your Strengths: Detail-oriented, family-oriented, ability to assist others