Our Team

Our team is enthusiastic and fun-loving, giving our studio a vibe that is unique Arcadia. Together we inspire each other to create innovative, award-winning designs.

Alex Longley

Alex founded Arcadia in 2011 to establish a landscape firm that is driven to create world-class landscape outcomes. His passion for connecting people with the landscape, and his longstanding industry relationships built on his ability to deliver exceptional projects, have helped Arcadia become one of the leading landscape architecture firms in Sydney. Also key to Arcadia’s success is the way Alex’s belief in nurturing team development has built a talented team within a collaborative workplace environment. Alex has provided the inspiration for a unique studio culture, including Friday BBQs on the deck, the annual ski trip and Arcadia’s famous Christmas parties. Known as “Bear” for his once legendary ability to sleep in, Alex’s obsessions include rugby, skiing, the beach and spending time with his two young sons.

Michael Barnett

Mike became a Principal of Arcadia in 2014….and not just to balance Alex’s Wallabies passion with his love of the All Blacks! Mike’s ability to create authentic and compelling open spaces is pretty useful as well. Mike excels at challenging the process and driving the team to deliver rigor and detail in their work. The results are project outcomes that exceed client expectations, strengthening Arcadia’s reputation for delivery of quality projects. With his laidback hipster vibe, you’d never guess he grew up on a farm in NZ. Any mention of motorbikes or snowboarding vacations will get a conversation started with this thrill seeker. With the least ‘popular’ taste in music in the office, he spends his weekends listening to bands you’ve never heard of….and his weekdays suffering through the music in the studio.

Nathan Clausen

“The Don” of our Brisbane office found his way to the Sunshine State via a childhood in Griffith and study at Canberra University. Nathan is a man of many talents – he loves making furniture in his spare time, he’s a keen gardener and with a past job as a Thai chef in Austria (yep!), we’re guessing he’s pretty handy in the kitchen too! His love of the outdoors has led to Nathan’s passion for designing outdoor places that activate and invigorate spaces for people to enjoy. But at Arcadia, a love of the ski slopes is almost as important, and Alex is thrilled to have a new recruit to his Arcadia ski team.

Chris Tidswell

This Adelaide-native always knew he wanted to be a designer. With a passion for designing memorable places, we’re lucky Chris found his way to Sydney, to share his extensive public domain experience with the Arcadia team. Time will tell whether he’ll be able to influence the team with his passion for AFL, and in particular, the Crows… he might be fighting an uphill battle with all the rugby lovers in the studio. Chris is a lover of most outdoor sports but it’s his love of skiing which is a plus at Arcadia – Mike’s got his work cut out trying to convert him to snowboarding for the ski trip.

Andrew Mason

Andrew is one of the core members of the Arcadia team and our original Kiwi. While not a morning person, this ice hockey player is renowned for his appetite and a natural design flair that seeks elegant design solutions, often inspired by the richness and diversity of the local landscape environs. As the undefeated Arcadia champion, his karaoke skills are a thing of beauty as well…

Kerby Clements

Kerby is our in-house Energiser Bunny. Whether it’s a night out, playing hockey or renovating her flat, Kerby’s stamina is phenomenal. She brings several years of experience on a variety of projects from large-scale master planning, to detailed landscape design. Refusing to leave the office until she’s sure everyone is on track to meet their deadlines, Kerby’s straightforward approach, strong technical knowledge and pragmatic processes are highly valued by clients and colleagues alike.

Mo Khallaff

Our BIM Manager Mo comes to Arcadia from Egypt, via time working in New York, and shares our passion for  designing and delivering projects to a high standard. Mo  not only leads Arcadia’s early adoption of BIM, he also lectures in the Architecture and Construction Project Management program at UTS. And he does all this while experiencing the joy of being a new parent…. and the not so joyful side effect of interrupted sleep! Not that you’d ever pick that with his calm personality.

Katie Leung

Katie’s sunny nature is a great advertisement for the positive endorphins produced by exercise – this keen runner is rarely without a smile! With more than 8 years in landscape architecture, Katie’s expertise is in the areas of planting design, public domain guidelines, tender documentation and aged care and health. She’s also fairly handy with arts and crafts (her lucky daughter!) and can belt out a respectable rendition of ‘Like a Prayer” when the karaoke mike is handed to her. We’re just waiting for the next staff outing so we can convince her to show off her Irish dancing!

Jonathan Fleri

Mad for the Sydney Swans (footy, beer and pies – what’s not to love?), Jonathan’s also a keen landscape photographer. When it comes to Landscape Architecture, he has a passion for integrating urban design and the natural landscape to help form a relationship between the user and the space. And his talents don’t end there…. Jon’s got some slick moves on the snowboard and the dancefloor, as seen on our last Arcadia Ski Trip!

Daniel Spicer

Seeing what Daniel’s mum has packed him for lunch is one of the high points of our day! And then finding out what he buys himself to eat after he finishes Mum’s lunch for morning tea…. Always entertaining, Daniel’s up for anything, whether it’s jumping off the end of Jones Bay Wharf for a lunch-time swim or trekking through the jungles of Malaysia. His passion for travel has helped shape his organic, non-conventional design style and his ability to translate abstract issues into practical and unique solutions.

Georgia Alexander

Joining Arcadia from a regional landscape architecture studio, Georgia brings a natural design style and love of gardens with her. Her claim to fame is one of the best we’ve heard yet – her grandfather wrote the Slim Dusty hit song “I’d Love to Have a Beer with Duncan.” Georgia’s motto is “do what you love and love what you do.” We hope this is more fitting now she’s a Landscape Architect at Arcadia than when she worked in an abattoir or as a rouseabout in a stinking hot shearing shed!

Alia Khan

While we all aim to design landscapes fit for a prince, Alia has actually designed palace gardens for a prince! If there’s a country she hasn’t lived in – Kenya, Austria, England, Bahrain, Australia – this travel enthusiast has probably been there. With energy to burn, outside of work you can find Alia at the beach, or cycling, skiing or doing krav maga. She also likes to get in touch with her creative side with painting, sketching, crochet and cooking. If you can find something Alia can’t do, please get in touch for your reward.


Stacey Edwards

Stacey’s the latest recruit to boost the number of All Blacks supporters in the studio. Stacey is one of our Landscape Architects, joining us full time after working with us as a Landscape Technician while she completed her Landscape Architecture degree at UTS. We can’t wait to see how she develops her innovative ideas around WSUD infrastructures, as well as her love of trees and fauna, to create her own landscape design style.

Sophie Randall

We’re pretty excited that Sophie has joined us as a Landscape Architect, after working with us as a Landscape Technician while completing her Landscape Architecture degree at UNSW. Sophie is dedicated to getting the job done – even if it means climbing a tree to get to a dumped share bike, which she did recently on our Business Clean Up Australia Day.

Chang Liu

Pip Meachin

Pip joined Arcadia to help spread the word about the amazing work the team is doing. The studio is her happy place – instead of spending the day trying to whip her kids, dog and messy house into shape, she gets to work on content for our website, social media, newsletters, awards and media. With our incredible view and fun team, what’s not to love about coming to work?

Julia Delaney

Sadly our studio manager can’t be with us every day, but it’s obvious the days when Julia is in the studio. Things work, timesheets get done and her positive, motivational energy is felt throughout Arcadia. And when this organisational genius isn’t here, she makes sure there is a bowl of sweet treats to remember her by. It’s a shame she can’t ditch her kids and look after us every day!

Crystal Dunn

Did you ever get told that if you find something you love, buy more than one? That’s what we did with our office managers – Crystal is the ‘yin’ to Julia’s ‘yang’ and together they make sure everything at Arcadia works to its full potential. When Crystal isn’t in the studio, she’s using her exceptional teaching skills to shape the minds of Sydney’s primary school kids or she’s out and about enjoying the beautiful outdoors with some hiking or beach time.

the studio

Arcadia Landscape Architecture is a talented team of landscape architects and urban designers focused on designing world class landscapes.

The Studio