Powering The Nation’s Energy Transition
With over three decades of engineering excellence, Hasilwan continues to build the infrastructure, partnerships, and innovations driving a sustainable energy future.
Energy Transition Solutions
Hasilwan is an engineering solutions company advancing Malaysia’s energy transition through integrated expertise in power grid, renewable energy, energy storage, and efficiency.
Since 1989, we have been trusted by utilities, developers, and industrial clients to deliver reliable, future-ready energy systems. Combining technical excellence with collaborative partnerships, we bridge current challenges and future energy needs — empowering businesses and communities for long-term progress.
Vision
Building Sustainable Futures through Energy Transition.
Mission
To be a solution partner that bridges current challenges and future energy needs through sustainable engineering and collaborative expertise.
Our Journey of Progress and Purpose
1989
Founded as a power infrastructure contractor serving Malaysia’s growing energy sector.
2010
Expanded into substation and grid modernisation projects nationwide.
2012
Diversified into renewable energy (solar and hydro) development.
2020
Introduced Energy Efficiency division to support government energy conservation mandates.
2023
Launched Energy Storage Systems and Low Carbon Mobility solutions.
2025
Expanding regionally and preparing for IPO as a leading energy transition company.
Guided by Experience. Driven by Purpose
Yong Sien WaeGroup Chief Executive Officer (GCEO)
Group Chief Executive Officer (GCEO)
Sien brings over 19 years of experience in power engineering and energy transition infrastructure. As Hasilwan’s Group Chief Executive Officer, he leads the Group’s strategic direction and long-term growth agenda, driving performance and alignment across its businesses. He has led the delivery of key infrastructure and energy transition projects, including high- and medium-voltage grid interconnection facilities, solar PV (LSS and C&I), BESS, and energy efficiency solutions focused on delivering reliable, innovative, and cost-sustainable outcomes for clients and stakeholders.
Yong Tzen WaeGroup Managing Director (GMD)
Group Managing Director (GMD)
Wae brings over 25 years of experience in power transmission and distribution, high-voltage substation and transmission line project delivery, and green energy infrastructure. As Hasilwan’s Group Executive Director, he oversees Group-wide execution and governance, ensuring strong operational discipline and consistent delivery across key functions and projects.
Our Values Shape Every Project We Deliver
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Honesty
We act with integrity and transparency in every decision.
Accountability
We take ownership and deliver on our commitments.
Sustainability
We design for long-term environmental and economic impact.
Innovation
We embrace new ideas and technologies that drive progress.
Learning
We pursue continuous improvement through curiosity and knowledge.
Welcoming
We build an inclusive environment that values every individual.
Agility
We adapt quickly to change while maintaining focus on results.
Nurturing
We grow relationships that strengthen clients, partners, and our people.
Built on Quality, Health, Safety & Environment
Our business success depends on consistent quality, effective risk management, and responsible environmental stewardship. At Hasilwan, these principles are not separate from how we operate. They are integrated into every business activity, operational control, and strategic decision we make.
Guided by an effective integrated management system aligned with ISO 9001 (Quality), ISO 14001 (Environment), and ISO 45001 (Occupational Health & Safety), we maintain a strong QHSE culture focused on preventing injuries and ill health, eliminating unsafe practices, minimising environmental impact, and continually improving performance. Leadership and accountability sit at the heart of this commitment, upheld at every level from our Senior Management Group to every line manager and team in the field.
This is our commitment to the people we work with, the clients we serve, and the sustainable future we are building.
Trusted by Leading Brands Across Industries
Collaboration is central to Hasilwan’s success. By working closely with clients across utilities, development, and technology sectors, we deliver scalable energy solutions that support Malaysia’s long-term sustainability goals.
