The Architectural Technologist, also known as a Building Technologist, provides technical building design services and solutions and is trained in architectural technology, building technical design and construction. Architectural Technologists apply the science of architecture and typically concentrate on the technology of building, design technology and construction. They can or may negotiate the construction project, and manage the process from conception through to completion, typically focusing on the technical aspects of a building project. The training of an architectural technologist concentrates on the ever-increasingly complex technical aspects in a building project, but matters of aesthetics, space, light and circulation are also involved within the technical design, leading the professional to assume decisions which are also non-technical.
Most architectural technologists are employed in architectural and engineering firms, or with municipal authorities; but many provide independent professional services directly to clients, although restricted by law in some countries. Others work in product development or sales with manufacturers.
In Britain, Ireland, Sweden, Denmark, Hong-Kong (Chartered Architectural Technologist), Canada (Architectural Technologist or Applied Science Technologist), Argentina (M.M.O Maestro Mayor de Obras / Chartered Architecture & Building Science Technologist) and other nations, they have many abilities which are extremely useful in a technological sense to work alongside architects, engineers and other professionals - the training of a technologist provides skills in building and architectural technology. It is an important role in the current building climate. Architectural technologists may be directors or shareholders of an architectural firm (where permitted by the jurisdiction and legal structure). To become an architectural technologist, a three-year diploma (or equivalent) in Architectural Technology is required, followed by structured professional and occupational experience.
Most provinces in Canada have an association representing architectural technologists and technicians. On behalf of the public, the provincial governments have granted the provincial architect's associations with the privilege to regulate the profession.
In the province of Ontario, there were protracted efforts by the Association of Architectural Technologists of Ontario (AATO) to persuade the provincial government and the Ontario Association of Architects (OAA) that the public may be served by having technicians and technologists also design small buildings. In 2003, OAA's efforts to work with AATO failed and, instead, OAA established a relationship with the Ontario Associated of Certified Engineering Technicians and Technologists (OACETT). This joint effort resulted in the creation of a new association called the Ontario Association for Applied Architectural Sciences (OAAAS). Through OAAAS, a qualified technologist can be licensed by the OAA as a Licensed Technologist OAA, with authority to design small buildings. In 2011, OACETT withdrew and OAA embraced OAAAS as its Technology Program. 
In the Republic of Ireland, the Royal Institute of the Architects of Ireland RIAI declares being the leading professional body for Architectural Technologists in Ireland. The RIAI recognises the professional Architectural Technologist as a technical designer, skilled in the application and integration of construction technologies in the building design process. RIAI Architectural Technologists are recognised as professional partners to Architects in the delivery of exemplary buildings in the Republic of Ireland and worldwide. However, the Royal Institute of the Architects of Ireland has always prevented its technician members to provide a full architectural service. Many qualified architectural technologists believe that a conflict of interest exists, that the RIAI represents architects and cannot adequately defend the interests of architectural technologists: "The RIAI acts as the Registration Body and Competent Authority for "Architects" in Ireland and only provides support services for Irish AT'".
Another representative body is the Chartered Institute of Architectural Technologists (CIAT). The technical membership of the RIAI (RIAI tech) is equivalent to the technician membership of CIAT (TCIAT). Chartered members of CIAT (MCIAT) are qualified and recognised to lead a project from inception through to completion. The RIAI and the CIAT were represented within the Building Regulations Advisory Body (BRAB) which advised the Minister for the Environment on matters relating to the Building Regulations. BRAB is no longer active. CIAT is now challenging the Building Control Regulations 2014, which are depriving its members from providing full architectural services in the Republic of Ireland. The Irish Government appears to have no valid reason to prevent CIAT members from practising in the Republic of Ireland. The restrictions imposed on members of the CIAT are viewed as anti-competitive and in breach of European Law for free movement of services. The CIAT is awaiting for an opinion from the European Commission on this issue.
In South Africa the profession is by the South African Institute of Architectural Technologists SAIAT. Senior architectural technologists (10 years or more in practice) enjoy the same statute than architects. The South African Institute of Architects SAIA explains that: "Architecture can be practiced in one of four categories of registered person, namely professional architect, professional senior architectural technologist, professional technologist or professional draughtsperson. The possibility of progression from one category to the next has been provided for in the Regulations."
In the United Kingdom, chartered architectural technologists enjoy the same status as architects. They deliver similar services with a different orientation. The Chartered Institute of Architectural Technologists CIAT regulates the profession. CIAT defines chartered architectural technologists as follow: Chartered Architectural Technologists provide architectural design services and solutions. They are specialists in the science of architecture, building design and construction and form the link between concept and construction. They negotiate the construction project and manage the process from conception through to completion. Chartered Architectural Technologists, MCIAT, may practise on their own account or with fellow Chartered Architectural Technologists, architects, engineers, surveyors and other professionals within the construction industry. As professionals adhering to a Code of Conduct, they are required to obtain and maintain mandatory Professional Indemnity Insurance (PII) if providing services directly to clients. They specify products with reference to the RIBA Product Selector, Architects Standard Catalogue, Barbour Index and trade literature.