About Dobias Professional Engineering, PLLC
Welcome to Dobias Professional Engineering. We provide mechanical (HVAC) and plumbing engineering services with an emphasis on thoughtful design, practical solutions, and reliable performance. Each system is engineered with a clear understanding of its operational requirements, project constraints, long-term end-user functionality and performance.
Looking for additional engineering or architectural services?
Dobias Professional Engineering has extensive experience serving as a single-source provider coordinating architectural and engineering disciplines, as well as construction partners, from initial project conception through completion of construction. Through more than a decade of established relationships with architectural, civil, structural, electrical, and other engineering professionals, along with qualified contractors, DPE can incorporate these services under one contractual umbrella when requested. This approach enhances communication, reduces client coordination effort, and helps minimize construction-related issues throughout all phases of the project.
Who We Are
At DPE, we’re committed to delivering reliable mechanical and plumbing solutions backed by strong engineering and responsive service. Our designs prioritize long-term performance, ease of maintenance, and constructability. Whether it’s a new system or an upgrade, we bring a consistent focus on quality, coordination, and cost control.
Our commitment to delivering coordinated projects that are both on-budget and on-time is what sets us apart from other engineering firms.
Our Approach
Our philosophy is built on four core principles:
- Client-Centered Service: We focus on clear communication and practical solutions so each design reflects the client’s goals and the real needs of the project, not generic assumptions.
- Technical Excellence: Our work is based on sound engineering fundamentals and proven experience. Mechanical and plumbing systems are designed to meet applicable codes, perform as intended, and hold up over the life of the building.
- Innovation and Sustainability: Where appropriate, we incorporate innovative and sustainable strategies that make sense for the project. These approaches are applied thoughtfully, with an emphasis on long-term performance rather than trends.
- Strong Local Contractor Partnerships: We often work closely with trusted local contractors throughout the design process. These relationships support coordination, constructability, and smoother construction. Our designs are developed to be built and installed in the field, not just drawn on paper.
Areas of Expertise
At DPE, we specialize in:
- Hospital and healthcare design: DPE supports healthcare projects ranging from Level 1 trauma centers to medical office buildings. Our CEO is one of only five practicing mechanical engineers in Oklahoma holding ASHRAE’s Healthcare Facility Design Professional (HFDP) certification. We design mechanical and plumbing systems that meet healthcare codes, standards, and operational requirements.
- Heavy industrial design: We have extensive experience in heavy industrial environments, including manufacturing, water and wastewater facilities, aviation, and related sectors. Our designs account for corrosive materials, hazardous and explosive conditions, and stringent cleanliness and process requirements.
- Commercial restaurants: Restaurant projects present unique challenges related to airflow, building pressurization, and high heat loads. We provide coordinated designs for air handling units, exhaust hoods, make-up air systems, and integrated fire suppression, with a focus on code compliance, performance, and constructability.
- Remodels: With more than 15 years of experience in commercial building remodels, DPE understands the unique challenges these projects present. Successful remodels require more than designing a functional space. We evaluate how proposed changes affect existing systems, including airflows, building pressures, and plumbing infrastructure in adjacent and interconnected areas.
- Other areas of expertise: DPE has broad experience across a wide range of project types, including natatoriums, laboratories utilizing Phoenix Valve systems and controls, dental and orthodontic surgery offices, large assisted living facilities, museums, auditoriums and gymnasiums, pool pump houses, general office spaces, K-12 schools, higher education facilities, apartments, shopping centers, gas stations, and car washes.



Our Commitment
Our commitment is guided by the following principles:
- Quality Assurance: We maintain high standards throughout every phase of a project, from initial concept through construction and into long-term operation.
- Continual Improvement: We stay current with evolving technologies, codes, and industry best practices to deliver effective, well-reasoned engineering solutions.
- Client Satisfaction: We value long-term client relationships and take ownership of our work. When challenges arise, we address them directly and work to resolve issues promptly and fairly.
Thank you for considering Dobias Professional Engineering, PLLC for your mechanical and plumbing engineering needs. We look forward to working with you to bring your project to life.