Our Firm

Born in 1998 in Marche-en-Famenne, Martin PIRSON holds a Master’s degree in Architecture from the University of Liège (2021).

After graduating, he joined Hotua-Poncelet Architecture in 2021 as part of his internship.

Passionate about 3D design, computing, and new technologies, he aims to further develop and refine his skills in these areas.

In July 2022, following the merger of HP, U’Man, and Pierre Maes, he joined UMAN architect, working primarily on public contract projects.

Born in 1995 in Liège, Eleftherios STYLIANIDIS holds a Master’s degree in Civil Engineering–Architecture from the University of Liège (2018). He began his career and completed his entire internship at the architecture firm Pierre MAES & Associates. During this time, he took part in a wide variety of projects, ranging from house extensions and full energy-efficient renovations of public housing to industrial halls and other public infrastructures such as hospitals and sports centers.

At the same time, he quickly launched his own practice, developing residential projects that included the transformation of single-family homes and the design of apartment buildings. In 2022, he became a partner and actively engaged in the new venture UMAN architect.

Born in 1993 in Liège, Marie POULET holds a Master’s degree in Civil Engineering–Architecture from the University of Liège (2016). After completing her two-year internship with an independent architect where she worked on the design and realization of various projects (residential buildings, renovations, industrial halls, offices) she decided to carry out her own architectural projects.

At the same time, seeking to broaden her expertise, she joined the special engineering firm Energ-Ir, where she designed ventilation, heating, plumbing, and electrical systems for a range of projects, including schools, office buildings, collective housing, and castles. She has also completed training as an Energy Performance of Buildings (EPB) Manager.

Marie is passionate about contemporary architecture and technology, particularly when combined with the energy and environmental challenges of construction. At the beginning of 2022, driven by the desire to return to her first passion architecture she decided to join UMAN architect.

Graduating with distinction in Architecture from the Institut Supérieur d’Architecture Lambert Lombard in Liège in 1983, Pierre MAES founded the Architecture Office Pierre Maes and Robert Mélotte immediately after completing his studies. He has since worked across a wide range of fields, including residential buildings, industrial facilities, tertiary sector projects, hospital architecture, urban planning and design.

In 1997, focusing primarily on public contracts and industrial projects, he established the firm Pierre MAES & Associés. Deeply interested in architecture and heritage from an early age, he joined the Royal Commission for Monuments, Sites and Excavations in 2001. A registered member of the Order of Architects of Liège since 1983, he has also been registered with the Order of French Architects (Hérault) since 1990.

Passionate about technology and the environment, he contributed to the development of energy performance software and also served as an Archicad beta tester for Graphisoft. Firmly convinced of the importance of multidisciplinary teamwork toward a shared goal, he co-founded the firm UMAN architect in 2021 with his partners and associates.

As an associate architect at UMAN architect, he brings the benefit of nearly 40 years of experience, guiding teams toward the realization of projects that strive for optimal quality. He advocates for constant dialogue and collaboration, key ingredients in the success of any project.

Born in 1979 in Liège, Malik MERBAH holds a Master’s degree in Architecture from the University of Liège (2003), with a specialization in Micro-Architecture. After completing his internships at 3F Architecture, he joined the firm Pierre Maes & Associés Architectes S.A. in 2006, where he worked for several years as a project manager.

During his 16 years at Pierre Maes & Associés, he was able to apply his skills and creativity to the design and realization of a wide variety of ambitious projects including industrial buildings, tertiary and service-sector facilities, apartment and office buildings, police stations, social housing, and private residences. This experience enabled him to master all phases of the architectural process, from initial design through to the final completion of works.

Deeply interested in 3D design, he also possesses strong skills in this field and is eager to refine and expand his expertise toward virtual immersion technologies. While he is highly sensitive to the aesthetic dimension of architecture, he always strives to design functional, high-quality spaces that meet his clients’ expectations.

In January 2022, following the merger of the firms Pierre Maes & Associés, HP, and U’MAN, he joined the new structure UMAN architect.

After completing my secondary studies at Travaux Publics de Liège, followed by a special mathematics program to prepare for higher education, I attended the Institut Lambert Lombard in Liège, where I received my architecture diploma. I immediately established myself as an independent architect while also working in several architecture offices.

A certain individual named Pierre Maes welcomed me into his growing team, providing valuable experience and opportunities. Now, at retirement age, I was offered a new challenge, which I gladly accepted, recognizing that the merging of skills and goals was giving rise to UMAN Architect.

This new horizon proved stimulating, and I was honored to be part of it. The merger of the three firms (HP Architecture, Contraste, and Pierre Maes & Associés) opened up new areas of practice previously unexplored, all working toward a shared goal of development. Long live the future.

Born in 1970 in Liège, Sabine SIMAL earned a secretarial diploma in 1988. After her first professional experience at the GENDARME consultancy office, she joined the Guy PARTHOENS engineering firm, where she further developed her expertise, primarily in the judicial and architectural fields.

In 2005, she joined Contraste Architecture, where she honed her secretarial skills, particularly in the context of architecture, handling tasks such as preparing construction site reports, liaising with various administrations and construction companies, managing schedules, and welcoming clients.

Grégoire DECHÊNE was born in 1979 in Tours, where he began his stone masonry training with the Compagnons du Devoir in 1995. He earned his CAP in 1997 and his CPP in 1999. Over more than 20 years, he honed his craft on numerous construction sites in Belgium and France, culminating in being recognized as a Talent Wallon in 2018.

He worked both on the creation of sculpted works and on the digital drafting (CAD) of these structures. It was his passion for drawing that led him, in 2019, to join Contraste Architecture, where he expanded his skills to include other techniques, such as BIM.

Born in 1977 in Verviers, Pierre PONCELET completed his secondary studies at IATA in Namur and earned a Master’s degree in Architecture from Institut Saint-Luc Liège in 2001, specializing in urban planning.

He began working independently immediately after graduation and, in 2008, partnered with David Hotua to establish HP-Architecture SRL. Active in both private and public projects, the firm grew steadily, bringing together around ten architects by 2020.

Sharing the desire to expand and pool expertise, HP-Architecture collaborated with Contraste and Pierre Maes, culminating in the creation of UMAN architect.

Originally from Namur, Antoine Poncin is currently in his final year of Architecture at the University of Liège.

He is particularly interested in the rehabilitation and transformation of buildings, with a desire to breathe new life into neglected spaces. Curious and motivated, he views his upcoming internship as an opportunity to learn alongside experienced professionals and take his first steps in the field of architecture.

With this goal in mind, he joined the firm ÔME, eager to fully engage in projects and develop his skills within a dynamic team.

Born in 1972 in Rocourt, Stefania BERTOJA earned her Architecture diploma from the Institut Supérieur d’Architecture Lambert Lombard in Liège in 1995. Upon completing her studies, she began her career and completed her entire internship at Pierre MAES Architecture. She later became an associate collaborator and Administrator at Pierre Maes & Associés Architectes S.A.

With a strong awareness of space quality, design, and the environment, she has, for over 25 years, managed numerous projects across various sectors, with a particular focus on public contracts. For more than 15 years, she has served as project manager, gaining extensive experience in hospital facilities, commercial buildings, office complexes, and listed heritage buildings, among others.

In 2022, she continued her journey as an Associate Architect at UMAN Architect.

After many years working in construction, Eric LACROIX decided to reorient his career and pursued training as a “Versatile Draftsman in an Engineering Office” at EAFC in Blegny.

Following an initial solo experience in an architecture office, he joined UMAN architect with the goal of joining a team of draftsmen, further developing his skills and leveraging his hands-on knowledge of the field.

Born in 1991 in Woluwé-Saint-Lambert, Julie Miers holds a Master’s degree in Civil Engineering–Architecture from the Catholic University of Louvain, obtained in June 2014.

Born in 1974 in Huy, Sébastien DECKMYN holds a Master’s degree in Architecture from the University of Liège (2000). After completing his internships, he co-founded Contraste Architecture in 2002. From the start of his career, he developed his expertise in both private and public projects.

In 2004, he trained in judicial expertise, a practice he continues to apply regularly. In 2012, he founded SPRL Gdlex, a company focused on technical consulting, which he left in 2018 but continues to collaborate with. In the same year, he became a trainer at the Collège des Experts Architectes de Belgique, where he currently serves as Vice-President.

Registered with the Order of Architects of the Province of Liège, he is also very active in the associative sector and has served as President of the Order of Architects of the Province of Liège since January 2021. As an associate architect, he contributes to the organization of the firm and the development of UMAN architect.

Born in 1997, Thi Mai HANOCQ holds a Master’s degree in Civil Engineering–Architecture from the University of Liège (2020).

After completing part of her internship at a Liège-based architecture firm, where she participated in various types of projects (residential, industrial, etc.), she joined Pierre MAES & Associés Architecture. In 2022, she became part of UMAN Architect.

At the same time, to broaden her expertise, she pursued training to obtain EPB Manager and EPB Certifier certifications.

Driven by a strong passion for both creativity and technical expertise, Stéphanie Maquet chose to study architecture.

Since 2007, she has thrived in creating living spaces, developing innovative technical solutions, and turning constraints into genuine opportunities. For her, each project is a chance to rethink limits and design functional, aesthetic, and sustainable spaces that meet specific needs.

Stéphanie pays special attention to the small details that make a difference, whether in the choice of materials, furniture design, or the search for subtle yet essential technical solutions.

Always eager to grow, she has expanded her skills over the years through training in safety and health coordination as well as building energy performance, subjects now central to her practice.

Today, her thirst for learning has led her to explore new horizons. Viewing architecture as a true team endeavor, Stéphanie joined ÔME Architect, an environment where she collaborates with passionate professionals to continue enriching her vision of architecture.

Born in 1974 in Liège, Fabrizio TENGATTINI holds a Master’s degree in Architecture from the University of Liège (2000). Immediately after graduation, he specialized in public contracts, and his daily deepening of the relevant laws led him to become a trainer for architects.

From 2004 to 2010, he also served as an Assistant Professor at the Haute École de la Province de Liège, where he trained future Construction Bachelor's students in professional practice. His passion for architecture and his profession earned him the Cadet Star in 2009 and the Gold Honor Insignia from the Institut Royal des Elites du Travail in 2016.

He is very active in the associative sector, advocating for his peers, and currently serves as President of the Union Wallonne des Architectes (UWA). As an associate architect, he contributes to all projects, focusing particularly on overall design and project guidelines.

After 20 years of experience in companies, with a career consistently combining communication and human resources, notably within two major industrial groups, Florence CLOTUCHE now supports UMAN in its “People & Communication” activities.

On a daily basis, she applies her communication expertise, HR experience, and coaching training to serve the team, all aimed at enhancing the employee experience.

After obtaining his Architecture diploma from Saint Luc Liège in 1997, Emmanuel PIERRET began his internship in the Pays de Herve at the Garsoux and Dethier office.

With six years of diverse experience, he then joined and became a partner at the Artau office in Malmedy, where he had the opportunity to work on large-scale public projects (nursing homes, hospitals, clinics) as well as residential projects.

The 20 years he spent at Artau allowed him to develop extensive knowledge and expertise in project execution and construction site management, with the MontLégia Clinic project as a career highlight.

In 2024, he embraced a new phase of his career by joining UMAN architect.

Born in 1998 in Liège, Manon VANDERSMISSEN holds a Master’s degree in Architecture from the University of Liège (2022).

Immediately after graduation, she joined UMAN Architect to complete her internship, participating in a variety of projects while specializing in public contracts.

Graduating from the Institut Supérieur Saint Luc in Liège in 1982, Pierre Monseu immediately embarked on a career as an independent architect.

He spent two years as a collaborator with Groupe Ause, led by Eugène Moureau and Philippe Coyette, and was one of the winners of the “A Future for the Past” competition, sponsored by the Council of Europe in Strasbourg.

In 2000, the construction of new offices in Huy coincided with the creation of his own practice, Pierre Monseu Atelier d’Architecture, providing an opportunity to apply his field experience and technical expertise.

In 2024, he partnered with UMAN and Jehoulet Architect to establish the firm ÔME.

Joining UMAN in 2024, UVAN does not create architecture, draw, or write construction meeting reports.

As Mobility Manager, his role is quite different: he accompanies the team in the field, during team-building events, and on site visits. He can also be found waiting at the bottom of ski slopes or with wheels in the sand and his hood in the sun.

Robust, versatile, and easily recognizable, UVAN is a valuable addition to our team!

Born in 1985 in Libramont, Damien DENIS holds a Master’s degree in Architecture from the Institut Supérieur d’Architecture Lambert Lombard (2009). He began his internships at the A.3 office in Arlon, working on projects of various scales and program types.

Two years later, at Altema, he contributed to the development of public contracts, primarily focusing on execution phases and construction site management. Seeking experience in the single-family housing sector, he joined HP ARCHITECTURE in 2014, where he further developed his creativity.

Today, he is primarily driven by public contract projects and diverse programming. Actively involved in the associative sector, he participated in the founding of UMAN architect in December 2021. As an associate architect, Damien leads the large projects and public contracts team.

Born in 1979 in Namur, David HOTUA holds a Master’s degree in Architecture from the University of Liège (2003). After completing his internships, he worked for several regional offices before partnering with Pierre PONCELET to establish HOTUA+PONCELET ARCHITECTURE in 2008, based in Marche-en-Famenne.

Passionate about the dynamics of development and human synergies, he contributes to the added value of UMAN Architect. Registered with the Order of Architects of the Province of Luxembourg, he is also a strong advocate and representative of the associative and cultural values of his region.

As an associate architect at UMAN architect, he contributes to the firm’s overall vision.

Born in 1995 in Rocourt, Jérémy MOTTARD holds a Bachelor’s degree in Graphic Techniques. Passionate about architecture and interior design, he specialized in 3D architectural rendering during his studies.

Shortly after graduating, he collaborated with several architecture firms across Wallonia before joining UMAN in January 2023.

As a 3D graphic designer, his role is to assist architects, developers, and builders in representing their construction projects through realistic 3D visuals.

Jean-Yves Jehoulet has always aspired to be an architect—he drew his first building at the age of seven! After graduating from Saint-Luc in Liège, he worked at CABANN architectonic’ and AIR-lab before founding his own firm, Jehoulet Architect, in 2012.

Actively involved in the advocacy and representation of the architectural profession, Jean-Yves has been a member of the Order of Architects since 2014. Within the institution, he has held several positions and currently serves as Secretary of the Francophone and Germanophone Council and of the National Council.

In 2024, he co-founded ÔME architect alongside Pierre Monseu Atelier d’Architecture and UMAN architect.

Born in 1978, Marc DEDECKER holds a degree in Automotive Mechanics, obtained in 2000.

Driven by a creative spirit and an interest in architecture and construction, he pursued training in building drawing and construction techniques, a pivotal step that allowed him to combine his technical skills with artistic creativity.

Equipped with these new competencies, Marc joined O2 Architecture in January 2018, where he began learning Building Information Modeling (BIM).

In September 2023, he embraced a new challenge by joining UMAN. With his diverse experience and passion for innovation, Marc continues to push the boundaries of his field daily, leaving his mark on the world of architecture and construction.

Born in 1992 in Liège, Colin CHARLIER studied Communication with a specialization in Journalism at the University of Liège.

After graduating, he worked for six years as a communications officer in professional organizations and as a journalist for the Belga news agency before joining UMAN Architect in January 2024, ready to take on new challenges.

On a daily basis, he is responsible for external communication (website, social media, newsletters, etc.) and the organization of events.

Arnaud DETRO works as a draftsman at UMAN architect.

Trained as an architect in Brussels, Amandine PAGEAIS is passionate about science, mathematics, and puzzles. Sensitive to art, light, and attentive to detail, she naturally specialized in residential architecture and joined ÔME architect.

Her driving force is sustainable construction, creating spaces that are beautiful, healthy, and breathable. She designs environments that promote well-being and intelligent use, spaces where people enjoy living, even on a rainy Monday morning.

Her own house in the Condroz ? Designed by herself and built during her pregnancy because she enjoys taking on two challenges at once, with the same level of precision and emotion.

Recently graduated in Architecture from the University of Liège, Lucie LOIX is originally from Geer, a small village in the Hesbaye countryside, where she grew up on a farm, fostering her appreciation for authenticity.

During her Master’s, she developed a passion for repurposing old buildings, giving new life to historically rich spaces while adapting them to contemporary uses. In 2023, Lucie spent time in Italy for an Erasmus program, an experience that greatly enriched her studies both professionally and personally.

In early September, joining ÔME architect was truly a dream come true for her.

Today, she is excited to explore the profession of architecture, learn from the wonderful team she has joined, and help design projects that may become clients’ lifelong dreams.