Why Us...

the design technical resource consultant....
"Design Oriented Architectural & Engineering firms" want to work with.

Let our firm bring added value to your team...

architectural services for nearly
$6.8 billion in construction projects.

Thomas Berger, Managing Principal




Expanding L.A. Office

DTR Los Angeles Office


DTR Consulting Services, the "Building Science Guys" continue to grow their latest Los Angeles Area Office, just north of down town in the city of Glendale.  This location will help us to better serve our Clients in the Los Angeles metropolitan area. This office will help support our Orange County office in Irvine along with or two northern California offices. This unadulterated office location allows for the continued expansion of DTR Building Science Division.

Overseeing this office is the Firm Managing Principal | Senior Building Envelope Consultant, BEC, RCI, CDT, SCIP Thomas Berger brings with him a long history of experience and connection to the local community.  DTR Consulting Services continues to work with new and existing Architectural/ Engineering Clients, Building Owners, Contractors and Developers and in the Los Angeles, Orange County and San Diego Area since early 2003. This move allows DTR to build upon our current client base and to expand our Firm to better serve our current and future A/E Clients.

DTR continues to recruit the best new technical building science architects, engineers and consultants the Los Angeles area. Mr. Berger be in charge mentoring new staff members into the existing DTR Culture, providing guidance to both experienced and junior members, and increasing our market share based on our excellent reputation; DTR approach to serving our Clients.  DTR will be looking to hire both Building Envelope Consultants specialized in Building Science, Technical Architects, Construction Specifiers and Construction Inspection & Building Enclosure Testing Staff.

Golden Gate Bridge photo

Please help us Celebrate the Growth of this new DTR Office Location…


Updated: February 2019

Industry News:

4 specs


Dynaflair Corporation - name change to Security Closures
Irwin Telescopic Seating Company - merged into Irwin Seating Co.
Compudyne - changed company name to Norment Security Group, had previously combined Norshield Security Products
Dynamic Lighting - name change to Amerlux Exterior
Alcan Composites USA - name change to 3A Composites USA
Oldcastle Glass is now Oldcastle BuildingEnvelope

Updated: January 03, 2011

Professional Events:

Conferences & Seminars

Contractor-Architect image

Green California Summit & Exposition- Sacramento, CA
April 19 - 20, 2011

AIA National Convention - New Orleans
May 12 - 14, 2011

CSI Construct 2011 - Chicago, IL
September 13 - 16, 2011

Cal Green Seminars - California
January thru April 2011

Updated: January 16, 2011

Why Should You Select Us?


Our firm philosophy has always been to provide our clients with unsurpassed technical consulting services through a thorough understanding of our client’s expectations, project needs, deliverable requirements, construction budgets and the building owner’s project requirements. 

We strive to offer our services in a manner to instill trust and to allow our clients to be more efficient and profitable.   This is a big thing from the core of our beliefs.  If our clients can realize a savings, in both labor and expenses, by using our services then we have done our job well.  By utilizing our knowledge and experience to bolster our client’s presentations, design constructability and construction bid documents, collectively we can increase your firm‘s value in the eyes of your clients and to limit all parties exposure to potential claims.

Through continual promotion of in-house professional development for all staff, ongoing educational activities and technology advances, we can bring to our clients cutting edge industry advances to our clients, bringing value to the project and protecting our clients from financial losses.
All staff is personally trained by the Founding Principal to understand their role in the Project Team.  From the way DTR teams are assembled, trained, educated and scheduled for your projects, you can be assured we can serve you better than anyone else in the industry.

Thomas C Berger, Managing Principal.

What to Look for?

Top 10 things you should consider before hiring a Specification Writer or Technical Consultant...

What to look for Checklist Download Specification Consultant Survey (click here)

This short survey has been prepared to assist Architectural/Engineering Firms and Design/Build Contractors understand some of the key differences between the traditional in-house staff specification writer and independent consultants (of varying sizes). With independent consultants, it will help clarify their strengths and shortfalls. It may also help determine what your firm specific needs are.

Who do want on your team...


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Our Mission Statement

To provide our clients with unsurpassed technical services through a thorough understanding of our client's expectations, project needs, deliverables, budgets and the owner's project requirements. Offer services in a manner to instill trust and to allow our clients to be more efficient and profitable. Utilize our knowledge and experience to bolster our client's presentations and construction documents to increase their firm's value in the eyes of their clients and to limit all parties exposure to potential claims. Promote in-house professional development for all staff and encourage ongoing educational activities, which support our Mission Statement




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