Construction technology consulting — from the jobsite to the boardroom.
John A Mullen ConTech Consulting LLC provides independent technical consulting at the intersection of construction, technology, and the codes that govern them. Services include plumbing and mechanical systems advisory, code interpretation and compliance strategy, construction technology implementation, and expert technical writing and training.
Two decades from the tools to the boardroom. John is a fourth-generation plumber whose career runs from a UA apprenticeship through contractor executive leadership — chief estimator and project executive managing more than 300 field tradespeople — to directing medical gas and plumbing programs across one of the nation's largest healthcare systems, to national leadership in plumbing and mechanical codes, standards, and technical research.
Services
Core Consulting
Plumbing & Mechanical Systems Advisory Independent technical guidance on plumbing and mechanical systems — design review, troubleshooting, and practical solutions grounded in field experience.
Code Interpretation & Compliance Strategy Clear, defensible readings of the plumbing and mechanical codes, and compliance strategies that keep projects moving.
Construction Technology Implementation Practical guidance on construction technology adoption — from the jobsite to the boardroom.
Technical Writing & Training Expert technical writing, training content, and educational resources for the built environment.
Business & Digital Services
Business Management P&L tracking and reporting, SOPs, and operational guidance for contractors and growing firms.
Programming & AI Projects Custom programming and AI tools built for contractors — practical software that solves real jobsite and office problems
SEO & Media Website SEO and media strategy, in partnership with Throw a Wrench in Your Plans Media.
Water, Policy & Representation
Water Management Plans Written water management plans for buildings and healthcare facilities — built on ASHRAE 188 principles by an ASSE 12080 Water Management Specialist.
Water Quality & Legionella Response Consulting on water quality issues and Legionella outbreak response — investigation support, remediation strategy, and prevention programs.
Government Affairs Coordination of government affairs and regulatory engagement — navigating codes, standards, and public policy on your behalf.
Owner Representation Independent owner representation — protecting your interests across design, construction, and commissioning.
Project Types We Support
Healthcare & Hospital Construction — Medical gas, plumbing, and water systems, from new construction to existing-facility programs.
High-Rise Residential & Hospitality — Complex plumbing and mechanical scopes delivered at scale.
Commercial, Laboratory & Mission-Critical — Facilities where system performance is non-negotiable.
Data Centers — Thermal and water-energy applications for high-density computing loads.
Geothermal & Thermal Energy Networks — Ground-source, networked geothermal, and district-scale thermal projects.
Plumbing, Mechanical, HVAC & Fire Protection — Core MEP scopes across new construction and renovation.
Energy systems and emerging tech: geothermal, Thermal Energy Networks, hydronics, hydrogen infrastructure, and water-energy systems — plus practical AI projects built for contractors.
A Perfect Match If You're
A plumbing or mechanical contractor — looking to sharpen estimating, operations, P&L performance, or technology.
A general contractor or construction manager — needing a plumbing/mechanical subjectmatter expert on your team.
A building owner or facility team, including healthcare — managing water systems, code compliance, or capital projects.
An engineering firm — wanting a field-grounded second set of eyes on design and constructability.
A manufacturer, utility, or energy developer — working in thermal energy, geothermal, or water-energy systems.
An organization navigating codes or policy — needing representation before code bodies, regulators, or government stakeholders.
