3rdLine.Studio is a mid-sized architectural practice based in Sudbury, Ontario. Established in 1984 by Dennis Castellan and Peter Dewit, the office has been in practice for over 30 years. Offering a full range of architectural services our built portfolio includes residential, commercial, institutional and industrial work across northern Ontario and beyond. In its 30 years of practice 3rdLine.Studio has built its reputation upon leading, designing and delivering creative architectural solutions that respect both function and finance.
What’s in a name
In 2016, Castellan James and Partners Architects became 3rdLine.Studio. This change in name represents a continued evolution of the practice. We continue to believe in the power and strength of a studio process and open collective effort. We continue to build upon lessons learned and are committed to the delivering successful projects.
The name itself, 3rd Line Studio, is grounded in the elements we have defined as essential to the practice of architecture.
PEOPLE | EARTH | BUILT FORM



Our Team
Timothy James
Architect
B.E.S., B.Arch., OAA, MRAIC
Mike Ladyk
Architect
B.Arch., OAA
Angèle Dmytruk
Architect
M.Arch., B.Arch.Sci., OAA
Vanessa Vachon
Professional Quantity Surveyor
PQS, GSC, M.A.A.T.O.
Sergio Cacciotti
Professional Quantity Surveyor
PQS, CET, GSC
Andrea Vettoretti
Project Architect
M.Arch., B.Arch.Sci., OAA
Melissa Karppi
Technologist
Dip. Architectural Technologist
Ian Boyne
Project Manager / Contract Administrator
April Machum
Architect
B.A.S, M.Arch, OAA
Eric Lalonde
Architect
B.A.S, M.Arch, OAA
Ilenia Avola
Intern Architect
Kristina Hakala
Intern Architect
B.A.S, M.Arch
Cassidy Duff
Intern Architect
B.A.S, M.Arch
Maria Zakharova
Intern Architect
B.A.S, M.Arch
Sheri Tavella
Controller
PCP
Vivianne Giroux
Document Control Officer
Timothy James
Architect | B.E.S., B.Arch., OAA, MRAIC
Tim has practiced architecture with 3rdLine.Studio in Northern Ontario for over 20 years. His work includes highly sustainable environments; commercial developments, offices, schools, laboratories, industrial and residential work. His focus is ensuring design solutions create long life projects. Tim’s work with Canada Revenue Agency and with Rainbow District School Board have assisted these organizations to manage significant change with respect to their physical infrastructure. Tim has contributed design leadership to community projects including Rotary Park, Laurentian University School of Architecture and Health Sciences North.
Mike Ladyk
Architect | B.Arch., OAA
Michael Ladyk joined the Firm in 1995 as an intern architect and has been a Partner since 2005. With 22 years of experience in the practice of architecture and construction, Mike has liaised with a diverse group of clients, consultants and trades to complete projects across commercial, industrial, institutional, First Nations and residential sectors.
Mike is a skilled technical designer with a clear understanding of function, form and material issues. He is well known for listening and responding to client issues and excels in team environments, managing multiple tasks in a professional and practical manner. He takes pride in assuring that the needs of clients are met by acting as prime contact through all phases of the project.
Currently a member of the Greater Sudbury Development Corporation (GSDC), Board Member of the United Way Capital Campaign (2017-2019), President of the Wavy Lake Campers Association, President of Corsi Hill Playgrounds and past Chair for the Sudbury Action Center for Youth (SACY) and former coach for the Sudbury Minor Hockey Association , Mike is notable for his contribution to his community. Grounded by his roots, he understands the importance of integrity and building a strong community.
Angèle Dmytruk
Architect | M.Arch., B.Arch.Sci., OAA
Angèle first joined 3rdLine.Studio in 2010, as an intern architect and 2018 as a Partner in the firm.
Angèle’s wide range of experiences both culturally and professionally play a significant role in her approach to design at 3rdline Studio. Angèle received her undergraduate degree at Ryerson University. In the following years Angèle lived and worked in Southern Ontario specializing in the high – end residential sector later moving abroad to immerse herself in European culture and design. She later completed a Master’s of Architecture at Lawrence Technological University in Southfield, Michigan.
With 12 years of experience Angèle is well versed in design development, construction documentation, interior design, budgets, contract administration and project management across the institutional, commercial, residential and industrial sectors. Now an architect and partner at 3rdLine.Studio, Angèle is seeking to build long term client relationships.
She is currently a member with the Business and Professional Women’s Club of Greater Sudbury (BPW) and is a part time professor at Collège Boréal.
Vanessa Vachon
Professional Quantity Surveyor | PQS, GSC, M.A.A.T.O.
Vanessa is a partner of the firm and is a Professional Quantity Surveyor with 12 years of experience providing construction management and architectural services at 3RDLINE STUDIO and POLESTAR CM. Vanessa excels at putting buildings together and managing the contract documents and the trade contractors that construct the work. She leads the development of costing analysis and value engineering throughout project development. Her strong leadership and project management skills are supported by a firm foundation of technical building knowledge. She has led the development of contract documents for buildings valued up to $30M. She is a member of the Canadian Institute of Quantity Surveyors (CIQS), of the Association of Architectural Technologist of Ontario (AATO) and has Gold Seal Certification (GSC) from the Canadian Construction Association (CCA).
Vanessa was born and raised in Sudbury and has been exposed to the construction industry since her childhood. She is a proud French Canadian with aspirations of contributing to French communities in the North.
Vanessa’s focus has been on providing project management leadership. She is working with institutional and private sector corporate clients on a wide variety of project types and scales. She enjoys making meaningful spaces happen for her clients on budget and on time.
Sergio Cacciotti
Professional Quantity Surveyor | PQS, CET, GSC
Sergio is a managing Principle of 3rdLine.Studio since 2000. In his role he acts as the Chief Financial Officer, Professional Quantity Surveyor, Certified Engineering Technologist, Gold Seal Certified Construction Project Manager and Senior Contract Administrator.
Sergio is a vital member of 3rdLine.Studio. He brings added value to our team with his vast construction experience and knowledge. His work primarily focusses on project cost management and value engineering during design and construction.
Andrea Vettoretti
Project Architect | M.Arch., B.Arch.Sci., OAA
Andrea is a licenced architect and has been with the firm full time since 2015.
Born and raised in Sudbury, Ontario, Andrea’s research investigated architectural opportunities for repurposing post extraction landscapes; it is this desire to contribute to the architectural landscape of the North that brought her back to the region.
During her time with 3rdLine.Studio, Andrea has had the opportunity to design, lead, manage and coordinate a variety of projects across Northern Ontario.
Andrea completed her studies at Ryerson University and is a licensed architect with the OAA.
Melissa Karppi
Technologist | Dip. Architectural Technologist
Melissa joined our 3rdLine.Studio team in 2015. She graduated from Algonquin College’s Ontario College Advanced Diploma for Architectural Technology, and started her career in the architectural field in Ottawa before migrating back home to Sudbury. Melissa is currently in pursuit of becoming a member of the Association of Architectural Technologists (AATO) and is a highly-engaged individual.
Ian Boyne
Project Manager / Contract Administrator |
Ian Boyne was born in Coatbridge, Scotland and immigrated to Canada in 1964 where he grew up in the small northern Ontario town of Espanola. Ian has worked as a Project Manager for nearly 30 years on a wide variety of projects ranging from $50,000 to a $200+ million hospital expansion. His job included working with clients, collaborating and listening to their requirements, designing and implementing a plan in order to create the final project. Ian also worked for the provincial government for five years, working with different ministries to implement their needs for various projects.
April Machum
Architect | B.A.S, M.Arch, OAA
Eric Lalonde
Architect | B.A.S, M.Arch, OAA
Ilenia Avola
Intern Architect |
Kristina Hakala
Intern Architect | B.A.S, M.Arch
Kristina joined 3rdLine.Studio as an intern architect in 2021, but first worked for the firm back in 2015, continuing to work on and off with our team throughout her academic studies. She completed her studies at the McEwen School of Architecture, graduating with her Master of Architecture in 2021.
Kristina was born and raised in Sudbury, and always knew she wanted to stay in Northern Ontario. She aspires to showcase the beauty of the northern landscape and culture through her career.
Her work includes everything from working with clients in the design phase through to contract administration work during the construction of the project. Kristina is currently working towards getting a well rounded experience in the architectural world and becoming a licensed architect in the near future.
Cassidy Duff
Intern Architect | B.A.S, M.Arch
Maria Zakharova
Intern Architect | B.A.S, M.Arch
Sheri Tavella
Controller | PCP
Sheri joined our 3rdLine.Studio team in 2010. She is responsible for all in-house accounting operations, pension/benefits administration, financial/government reporting, and employment standards compliance. She completed the Business Administration and Human Resources Management program locally at Cambrian College and holds a Payroll Compliance Practitioner certificate through the Canadian Payroll Association (CPA). Sheri is a driven professional that is currently working towards her Certified Payroll Manager certification through the CPA.
Sheri is skilled and experienced in accounting and human resources best practices, up to date with current HR trends, and compliant with payroll and employment standards.
She is also an active member of the Human Resources Professional Association, the Canadian Payroll Association and Young Professionals Association of Greater Sudbury.
Vivianne Giroux
Document Control Officer |
Vivianne joined our 3rdLine.Studio team in 2015. She has 5 years’ experience working as an administrative expert and enjoys helping others whenever possible. In her role, she is the first point of contact to 3rdLine.Studio and supports our technical staff and Partners. Vivianne’s dynamic ability to take on new responsibilities allows our staff and clients to focus on other priorities.