Contacts

I discovered my passion for construction as a young boy in my hometown of Lappeenranta, where I loved helping my parents with every possible task related to building and craftsmanship. My professional journey began in 2007, when I started studying at what was then Saimaa University of Applied Sciences. Summer jobs and career opportunities led me to Helsinki, where I started working permanently in an engineering office’s renovation design team at the end of 2010.

Throughout my career in structural engineering, I have primarily worked in renovation construction, project management, construction supervision, and consulting. In recent years, my role has shifted more towards administrative and quality project oversight, although I still remain actively involved in project design teams.

Certifications & Achievements:
•  B.Eng. in Civil Engineering
•  15 years of experience in renovation design, project management, and construction supervision
•  Founding Partner of Nodetec (since 2017)

FISE Certifications:
•  Steel Structures Designer – "V Class," new construction
•  Building Physics Designer – "V Class"
•  Concrete Structures Designer – "V Class," new construction
•  Concrete Structures Designer – "V+ Class," renovation construction

I am passionate about sports in all forms, but my heart is closest to skiing and triathlon. Over the years, I have completed multiple competitions, including successfully finishing the Ironman race in Barcelona in 2018. At home, my two amazing sons bring both inspiration and joy to everyday life.

Valtteri Vaarsalo
CEO
Nodetec Oy

I have been in the construction industry since 2007, when I started working on building sites as part of a group of carpenters. In 2010, I began working at Aalto University as a research and teaching assistant, focusing on building information modelling. My master’s thesis dealt with the same topic, and I completed it in 2012, at which time I also started working in an engineering office as a structural designer. Since then, I have worked in structural engineering. For the first five years, I mainly worked on repair and alteration projects, but I have since transitioned towards new building projects. Currently, my work is split approximately 50-50 between repair and new building projects. My role in projects is as a responsible designer and/or project manager. I am also in charge of BIM and overall technical development at Nodetec.

Expertise: Concrete structures, Repairs and alteration work, BIM

Certifications & Achievements:
•  M.Sc. in Building Technology
•  17 years of experience in the construction industry
•  Over 12 years of experience in structural engineering and BIM
•  Founding Partner of Nodetec (since 2017)

FISE Certifications:
•  FISE Concrete structures designer “Exceptionally difficult”: Renovation and alterations
•  FISE Concrete structures designer “Exceptionally difficult”: new structures
•  FISE Steel structures designer ”Difficult+”

Outside office hours, I keep my mind and body strong by exercising. You can usually find me jogging around the Old Town Bay before the break of dawn. I also maintain my management skills by spending time with my two inspirational daughters.

Patrik Laakso
CTO, Head of BIM development, Structural designer
Nodetec Oy

I have experience in structural design since 2009. My first design assignments were the design of concrete elements and residential apartment buildings. Since 2012, I have been involved in large renovation projects, such as the renovation of the Olympic Stadium and the OP Vallila headquarters. In the industrial sector, I have worked as a structural designer in several large projects in which I have designed exceptionally demanding concrete and steel frames and special structures such as underground high pressure walls. Examples of such projects include the Kaitaan metroasema (Länsimetro), the Finnoon Pumping Station and the Turun Wastewater Treatment Plant. In recent years, I have been responsible for the structural design of large renovation and modification projects in high-value properties in a prime locations in Helsinki.
In addition to project work, I am the head of the structural unit and work in the company's development and strategy. 

Expertise: Concrete and steel structures, Renovation projects, FEM

Certifications & Achievements: 
•  M.Sc. in Building Technology 
•  Over 15 years of experience in structural engineering and BIM 
•  Founding Partner of Nodetec (since 2017) 

Outside the office, I have the opportunity to develop communication skills and learn to create a good team spirit by spending time with my wife and two children.

Janne Hellsten
Co-Founder & Structural Engineer, Manager of Kotka Office
Nodetec Oy

I have been working on challenging and diverse structural design projects for 12 years, with around 6 years of experience as a project manager. My expertise covers both renovation and new construction, with some of the most interesting projects including:

•  The renovation and extension of the Olympic Stadium,
•  Participation in the concept design phase of the Lapinlahti Hospital renovation,
•  An ongoing large-span sports hall project in Espoo, built on a former marshland.

Renovation projects are particularly fascinating due to the unique structural methods and building materials used in different historical periods.

Expertise: Renovation construction, concrete structures, building information modeling (BIM)

Degree:
• M.Sc. in Civil Engineering

FISE Certifications:
• New Construction, Level V+

At Nodetec, I have especially enjoyed working with great colleagues, both on projects and in my free time, particularly through sports and physical activities. In challenging tasks that require advanced problem-solving skills, it is reassuring to be able to rely on a team of highly skilled professionals.

Anna-Kaisa Mero
Project manager
Nodetec Oy

I have been working in structural engineering support services since 2010. My role at Nodetec includes diverse administrative tasks.

Expertise:
•  20 years of extensive experience in various assistant and support service roles, as well as customer service.
•  Over 14 years of experience in the construction industry, specialised in structural engineering administration and support services.
•  I have specialised in structural engineering project management and processing and managing offers.

In my free time, I am active. I do weight training, horseback riding, and go to the gym whenever possible. I also enjoy being outdoors.

Suvi Pulkkinen
Business support services
Nodetec Oy

18 years of experience in structural design for residential, office, shopping centers, and hybrid projects. Specialized in concrete structures and steel/composite frame structures. Strong background in modelling and development of modelling processes

Expertise: Project management, precast concrete and cast-in-place structures, modelling, and development work

Heikki Aalto
Project Manager
Nodetec Oy

Jack has over 15 years of experience as a professional engineer, specialising in the design and execution of steel structures while maintaining proficiency in the design of a variety of other materials, including timber, reinforced-concrete, composite, and prestressed structures. As head of international projects, Jack deals with customers from around Europe and seeks new opportunities for Nodetec to grow globally.

Expertise: Steel structures, FEM tools, BIM, Third-party Checks.

Certifications & Achievements:
•  MEng Civil Engineering, University of Southampton, UK
•  Successfully delivered economical designs for hundreds of projects in the UK, Finland, and elsewhere in Europe.

Outside the office, Jack spends his time with his wife and two young children while pursuing his interests in playing music, football, and tabletop games.

Jack Barnard
Principal Engineer, Head of International Projects 
Nodetec Oy

Structural design experience since 1995. As a structural designer, I specialize in steel structure design and BIM software.

Certifications or educational background: Technician of mechanical engineering
Expertise: Structural engineering, project management

Petri Halonen
Project engineer, Structural designer
Nodetec Oy

Over 15 years in the construction industry, specializing in concrete, timber, and steel construction, with 2 years of experience as a structural designer.

Expertise: Renovation construction, concrete, timber and steel structure design, FEM analysis
Education: Bachelor of Engineering (B.Eng.) in Civil Engineering

Outside the office, I am passionate about versatile physical activities and music.

Antti Hurri
Structural designer
Nodetec Oy

I specialize in the design of complex steel structures, leveraging advanced BIM and FEM tools to enhance efficiency and precision.

Expertise: Structural Engineering, Steel Structures, BIM, FEM Software

Certifications & Achievements:
•  M.Sc. in Building Technology
•   3+ years of experience as a structural designer at Nodetec

In addition to my major in Building Technology, I pursued a minor in Computer Science at Aalto University to integrate automation into structural design, streamlining engineering workflows and improving productivity.

Ilia Sukharev
Structural designer
Nodetec Oy

Expertise: Structural Engineering, BIM

Certifications & Achievements:
•  Bachelor of Engineering (B.Eng.) in Civil Engineering
•  3 years of experience in structural design

Saana Härkönen
Structural designer
Nodetec Oy

I started working as a structural engineer in 2018, during the final years of my bachelor’s studies. I specialize in steel and concrete structural design and BIM software. The state-of-the-art engineering software inspires me to create new solutions to improve the engineer’s life.

Expertise: Structural design, BIM, FEM, Software engineering

Certifications & Achievements:
•  B.Sc. in Building Technology
•  7 years in structural engineering
•  Creation and management of the Nodetec internal BIM environment content and engineering toolkit. 

Outside the office, I am working on creating a better version of myself.

Mikhail Koshelev
Structural designer, Internal development specialist
Nodetec Oy

I have worked in various structural design tasks since 2020, covering both new construction and renovation projects. My main experience lies in steel structures and strength calculations.

Expertise: Structural design, steel structures, FEM analysis

Certifications & Achievements:
•  M.Sc. in Civil Engineering (Tampere University, 2023)
•  Structural Designer at Nodetec since 2024

What I find most fascinating in my work is applying mathematics and physics in a practical way to the design and analysis of structures.

Iina Kovalainen
Structural designer
Nodetec Oy

I have been working in the construction industry since 2009. At the beginning of my career I worked as a construction worker and later as a carpenter. I have been working as a structural designer since 2023.

Expertise: Renovation

Certifications & Achievements:
•  Over 15 years of experience in the construction industry
•  Over 1 year of experience in structural design
•  Bachelor of Engineering (B.Eng.) in Civil Engineering

Ossi Viren
Structural designer
Nodetec Oy

..

Expertise: Structural Engineering

Certifications & Achievements:
•  Bachelor of Engineering (B.Eng.) in Civil Engineering 

Verneri Forsell
Structural designer
Nodetec Oy

..

Expertise: Structural Engineering

Certifications & Achievements:
•  Bachelor of Engineering (B.Eng.) in Civil Engineering

Ville Oxel
Structural designer
Nodetec Oy

..

Expertise: Structural Engineering

Certifications & Achievements:
•  Bachelor of Engineering (B.Eng.) in Civil Engineering student

Samuel Puronhaara
Structural designer trainee
Nodetec Oy

I discovered my passion for construction as a young boy in my hometown of Lappeenranta, where I loved helping my parents with every possible task related to building and craftsmanship. My professional journey began in 2007, when I started studying at what was then Saimaa University of Applied Sciences. Summer jobs and career opportunities led me to Helsinki, where I started working permanently in an engineering office’s renovation design team at the end of 2010.

Throughout my career in structural engineering, I have primarily worked in renovation construction, project management, construction supervision, and consulting. In recent years, my role has shifted more towards administrative and quality project oversight, although I still remain actively involved in project design teams.

Certifications & Achievements:
•  B.Eng. in Civil Engineering
•  15 years of experience in renovation design, project management, and construction supervision
•  Founding Partner of Nodetec (since 2017)

FISE Certifications:
•  Steel Structures Designer – “V Class,” new construction
•  Building Physics Designer – “V Class”
•  Concrete Structures Designer – “V Class,” new construction
•  Concrete Structures Designer – “V+ Class,” renovation construction

I am passionate about sports in all forms, but my heart is closest to skiing and triathlon. Over the years, I have completed multiple competitions, including successfully finishing the Ironman race in Barcelona in 2018. At home, my two amazing sons bring both inspiration and joy to everyday life.

Valtteri Vaarsalo
CEO
Nodetec Oy

As a construction management consultant, I am responsible for project management, which includes overseeing various design disciplines, schedule and cost monitoring, and contractor procurement. I have particular expertise in managing facade, deck, and roof renovations. With seven years of experience in construction consulting, I bring the added benefit of a strong background in structural design. My experience also extends internationally, having worked as a structural designer in New Zealand for approximately two years.

Expertise: Renovation construction and property development

Certifications & Achievements:
Master of Science (Technology) – Building Technology
Aalto University – School of Engineering

I am driven by a constant desire to learn and grow. In my free time, I enjoy an active lifestyle, including cycling, surfing, and hiking. To balance my activity, I also enjoy reading.

Antti Wallenius
Project lead, Construction Management and Consultancy Services
Nodetec Oy

As a construction management consultant, I am responsible for comprehensive project management – from coordinating different design disciplines to schedule and cost monitoring, as well as tendering contractors. My areas of expertise include fast-paced space modifications and renovation projects, where precise project control and strong technical understanding play a crucial role.

I have six years of experience in construction consulting across a wide range of project types and sizes, from preliminary planning all the way to project handover.

Expertise: construction management, project management and supervision, renovation, high-end office & representation spaces

Education:
•  M.Sc. in Building Technology
•  Tekniikan kandidaatti

Oskari Hänninen
Project manager, construction and supervision
Nodetec Oy

I am an experienced construction professional with over 15 years of diverse experience in construction management, design, and damage inspections. For the past seven years, I have worked as a construction management consultant, overseeing projects of various sizes and ensuring they progress according to plans, schedules, and budgets.

I have also worked in repair design tasks, which has given me a strong technical foundation and a deep understanding of the construction project planning process. In addition, I have seven years of experience in damage inspections, during which I have assessed and investigated damages in various properties and acted as an expert in repair solutions.

My work is based on precision, open collaboration, and the goal of delivering the best possible value to the client in every project.

Certifications & Achievements:
•  Bachelor of Engineering (B.Eng.) in Civil Engineering

Paavo Löhönen
Project manager, construction and supervision
Nodetec Oy