Who We Are


Committed to providing better experiences to you and your customer

With over 30 years’ experience, GJK is a leading provider of facility services, committed to providing better experiences to our customers. We’re here to solve problems.

We do this through our greatest assets. Our people.

We recruit and retain the best. With a workforce of over 2,500 and a national footprint, we can meet needs locally while supporting our customers at a national level.

Safety is at the heart of everything we do. We believe all injuries are preventable and can be achieved through a strong safety culture. Living by the motto “you see it, you own it” empowers our people to speak out or stop work if they feel their safety, or the safety of others, is at risk.

We are committed to providing better experiences and we do this by listening to what our customers have to say. Our D3 model, Discover, Design, Deliver, encourages a collaborative approach, ensuring we design bespoke, innovative service solutions. Be it optimisation, productivity or cost efficiencies issues, we deliver the results needed for our customers’ business.

With long-standing customer relationships and contract tenures of over 8 years, across a diverse range of markets, we are a proven partner to work with.


GJK originated from a family commercial cleaning business in 1985.  George Stamas has worked for national and international cleaning companies in various executive roles and in 1987 become founder and owner of GJK Facility Services.

George had a vision of providing something different to the cleaning industry. Fast-forward 30+ years and we have moved from being just a commercial cleaning company to a multi-disciplinary facility services business. Today we are providing cleaning, restoration, grounds, projects & maintenance and facility services to a diverse range of markets.

He is still actively involved in the business today as Managing Director.

George Stamas
GJK Facility Services – 1985
Business started as a commercial cleaning company
GJK Facility Services – 2003
Awarded Cleaning, Grounds, Maintenance and Waste Management Contract with Office of
Housing (Victoria) and became part of the newly established Public Tenant Employment Program at
Collingwood and Altherton Public Housing Estates
GJK Facility Services – 2006
GJK recognised internationally for Public Tenant Employment Program, winning the H Bruce Russell International Global Innovators Award and being presented the award at Harvard.

Rebranded business to GJK Facility Services - diversified services to now include waste, pest, sanitary, grounds and maintenance.
GJK Facility Services – 2010
Business expands into NSW and has grown to 500 employees.
GJK Facility Services – 2011
First national contract awarded and business expands into Tas, SA, NT and WA
GJK Facility Services – 2014
Business starts focusing on sustainability and their part in reducing environment impact to the planet.

Result is winner of the Australian Business Awards 100 for Sustainability
GJK Facility Services – 2017
Business enters NZ
GJK Facility Services – Today
Multi-disciplinary facility services business, employing over 2,500 people across Australia and New Zealand servicing 250+ customers


GJK is a family, so it’s no surprise we live by the motto ‘treat everyone as if they were, your family’. Like all families we have our ups and downs, but some things remain the same.


To provide better experiences and better outcomes to our customers and our people.


To be a leading provider of facility services.


Our core values underpin the behaviours that our culture is built upon. They are core to who we are.
Collaborative Approach

We work together to build and sustain relationships to be a leading provider of facility services.

Customer Centric

We engage with our customers to provide positive experiences.

Innovative Outcomes

We continuously advance the science of our industry.


GJK Facility Services understand businesses like ours play a role in positively impacting change.


framework wheel


We understand every interaction we have with our people, our customers, the communities in which we work, the environment, and our stakeholders have an impact.

Designing our sustainability framework to address environmental, social, and governance issues relevant to our business, highlighting our commitment and addressing areas where we, as a business, can make meaningful and positive change.

Our road to Net Zero

We acknowledge the importance of protecting the environment for future generations. That is why we have set a goal to be net zero by 2040.

As part of this journey, we have offset our carbon emissions and become a certified carbon-neutral organisation under the Australian Government’s Climate Active program.

We will continue to reduce our Scope 1, 2, and 3 emissions on our road to net zero by implementing sustainable practices and innovative environmental solutions into our business, operations, and supply chains.

Working with our customers, we will help them reduce their environmental impact through green cleaning, waste  management and sustainable practice.

logo green

Why giving back is important

Our Founder and Managing Director George Stamas is passionate about giving back to the communities in which we work. George believes businesses, like ours, have a responsibility to help change lives. So, we are heavily involved with a range of charities, foundations and not for profit organisations that are important to George, and therefore important to us.

In 2022 GJK partnered with Lighthouse Foundation as part of the GJK Giving Back program.Logo of Lighthouse Foundation

Lighthouse Foundation provides homes and therapeutic care programs to children and young people impacted by long-term neglect, abuse, and homelessness. For the past 30 years, their proven Model of Care has successfully transformed the lives of over 1,000 young people using a range of evidence-based strategies. They now educate and support foster carers in the same way, so that they too can take care of some of Australia’s most vulnerable children and young people.


Logo for The Kids Cancer ProjectGJK has been supporting The Kids Cancer Project, a National independent charity for several years.

Founded by Col Reynolds OAM in 1993, The Kids Cancer Project’s mission is to help make a difference to the lives of kids living with cancer by raising monies for research to improve childhood cancer treatments. Col’s promise is “to never give up until every child survives cancer with minimal or no long-term effects“.

Through our partnership, our employees are helping The Kids Cancer Project achieve their mission through volunteering and workplace giving.


GJK’s partnership with Supertee started in 2022.

Supported by the Fair Fight Foundation, Supertee was founded by Jason Sotiris, who came up with the idea of Supertee when his one-year-old daughter was diagnosed with cancer.

Supertee’s vision is to offer a Supertee medical garment to Australia’s sickest and bravest children as they embark on their road to recovery.

A medical garment disguised as a superhero costume, Supertee is helping children battling life-threatening conditions. Its design allows parents and hospital staff to bypass most of the necessary medical equipment that children must be connected to when confined to their hospital beds.

We are proud to be partnering with Supertee. This collaboration enables GJK to give back and help support some of Australia’s most vulnerable children and their families.


The Hunger ProjectThe Hunger Project’s mission is to help end hunger by empowering the women and men living in rural villages in Africa, India, Bangladesh and Latin America by helping them build the skills and capacities need so they can support themselves, ending hunger.

Through the Hunger Project Victorian Development Board, we became involved in the Hunger Project in 2015, making a commitment to help raise monies for the Bougue Epicentre in 2017. The overall project target was to raise USD$440,000.

Through fundraising events such as raffles, lunches and some employees making regularly donations through their pay, we meet our target, raising over $40,000 over the past 3 and half years. To put this into perspective, every $2 we gave feeds a family in a third world country for a month.

Our employees have had a lasting impact on helping children born into poverty to receive food, medicine, education and so much more.

Established in 2006, Bridge of Hope (BoH) is a not for profit

foundation helping young people overcome disadvantage, exclusion and oppression by addressing social justice issues and breaking down the barriers they face.

This is achieved through their collaborative partnerships, advocacy groups, volunteers and their two key programs, Bridging the Gap and the Innocence Initiative.

Our Founder and Managing Director, George Stamas is a Board Member of BoH.




We have been a proud supporter of the Epworth Medical Foundation, a private, not for profit organisation for many years.

Over this time, we have supported the Foundation through our involvement and sponsorship of various fundraising activities they undertake throughout the year. These include the Epworth Gala Ball, Men’s Health and Women’s Health Lunches, Epworth Golf Day and a number of others.

Our support has contributed to the Foundation being able to raise funds to purchase state-of-the-art medical equipment, support programs to care of patient needs through to ground breaking medical research projects and trials. epworthmedicalfoundation.org.au

Public Tenant Employment Program

We have been part of the Public Tenant Employment Program since 2003 when we were awarded the Cleaning, Grounds, Maintenance and Waste Management Contract at the Collingwood and Atherton Gardens Public Housing Estates, Melbourne, Victoria.

Our supported employment framework was an overwhelming success, enabling long-lasting changes for tenant employees, including financial autonomy, breaking the cycle of unemployment, providing opportunities for family, and the chance to help their families and become role models for future generations.

Our success has been recognised several times. In 2006 we were awarded the H Bruce Russell International Global Innovators Award for the programs innovation and significant impact it has had to long-term unemployment and local community and again in 2011 at the Australian Business Awards for the Community Contribution Award.

Today the program is still going stronger.

Supply NationOur membership with Supply Nation started in 2019 and reinforces our commitment to diversity both within our workforce and procurement processes.

We have a history of initiatives designed to help close the gap for Australia’s Indigenous peoples and communities.

Supply Nation’s mission is to facilitate, encourage and promote business between corporate Australia and Government agencies and Indigenous owned businesses.

We are proud to be working with Supply Nation and helping them build a vibrant and prosperous Indigenous business sector by incorporating Indigenous owned businesses into the supply chain of Australian companies.

Visit supplynation.org.au

Yilabara LogoGJK entered a partnership with Yilabara Solutions in 2022 to continue our commitment to positively impacting change.

Yilabara Solutions is a leading provider of Aboriginal employment, training, cultural and consulting services. It is part of NSWALC statewide network of 116 local Aboriginal Land Councils and has a strong network of Industry leaders ensuring guidance of the highest standard.

Through this new partnership, we will be helping Yilabara create opportunities for their Aboriginal communities through new employment opportunities across the country.

For more information go to: yilabara.org.au

Strive Recruitment
We partnered with Strive Recruitment in 2018 as we saw a strong cultural fit. Their passion for supporting and helping disadvantaged and long term unemployed get into the workforce aligns to our own passion of being a business that helps make change.

Strive Recruitment have been working with us to source and support job seekers who are looking for an opportunity with a company where they can grow. Together, we have been able to build, acknowledge and show the value of a diverse workforce. strive.net.au


Specialists in their own areas of expertise, together they form a strong team, driving the growth and sustainability of our business.

Elias Stamas
Chief Executive Officer
Emilio Damiano
Chief Financial Officer
Leela Kalagara
Leela Kalagara
Chief Information Officer
Nerida Robertson
Nerida Robertson
Director, People & Culture
Walter Rafin Headshot 1
Walter Rafin
Chief Revenue Officer
Lyall Johaan Headshot 1
Lyall Johaan
Director, Operations
Julie Baker - GJK
Julie Baker
General Manager, Corporate Affairs & Sustainability


Rick Koumouris
George Stamas
George Stamas
Nerilee Rockman
Rick Albertini
Chris Hunt
Kristiana Greenwood
Kristiana Greenwood
Ian Silk March 2020
Ian Silk
Logo for Killara Services

As a part of George Stamas’ long-term vision that businesses can and should change people’s lives, he began a journey in 2017 supporting and mentoring an Indigenous entrepreneur, Jasmine Newman.

Jasmine is a proud Aboriginal woman with true passion to continue her family legacy and operate a successful company that created opportunities for Aboriginal people through employment and career pathways.

With initial and continued support from George and the executive team at GJK Facility Services, Jasmine is now an Indigenous business owner that has grown Killara to compete on a national scale. Staying true to George and Jasmine’s vision, Killara is becoming one of the most respected and attractive employers of Aboriginal people in our industry.

To learn more about Killara visit their website.

Pro1 primary logo

In February 2022, GJK Facility Services partnered with Pro1 – a family run business dedicated to solving all commercial maintenance and project needs, as part of our overall growth and diversification strategy.

Lead by Trent Hessell, owner and founder, Pro1 offers a wider range of services specialising in proactive and reactive facilities maintenance, office fitouts and defits. 

Operating 24/7, no job is too big or too small – whether it’s a paint spruce up, a door hinge replacement, through to a full-scale fit out, refurbishment, or asset maintenance plan.

With a team of experienced operatives, Pro1 are backed by a trusted network of over 100 contractors, allowing them to provide customers with the right solutions to their commercial maintenance or project needs.

To learn more about Pro1 visit their website.

Want to learn more?

We’re here to help. Contact us to find out how we can deliver better outcomes for your business.