Welcome to the O.S.U. Website

The O.S.U. website exists to keep members of the Union informed of the activities that we are undertaking this year and to report on a variety of topics of interest to Old Sydneians of all ages. To assist in managing the site and for privacy reasons some sections of the site are restricted to registered members, if you have not registered please log in here and create an account in your name indicating your areas of interest and once that is done your account will be activated. After that you will have full access to the Member’ area of the website.

The primary function of the Union is to encourage and facilitate ongoing interaction between the Alumni of Sydney Grammar School and to also assist the School. Focused around the year group reunions of five, ten, fifteen, twenty, twenty-five, thirty, thirty-five, forty, forty-five, fifty, fifty-five, sixty and yes, sixty-five year reunions, means that Old Sydneians are encouraged to meet every five years for as long as they care to.

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Apart from the Reunions and our Annual Dinner, the most exciting initiative of the Union that was commenced in 2010, after a long period of development, was the O.S.U. Mentoring Program and the quarterly Networking – Speaker Functions – a long-term effort to enable Old Sydneians to benefit from career advice from fellow Old Sydneians and key industry and professional experts as they progress through their chosen careers.

In September 2013 the Union celebrated our 120th anniversary (the O.S.U. was established on 22nd September 1893), and we are well aware that, in order to maintain our community of Old Boys, we are required to constantly enhance and expand the services we offer our members, programs and initiatives that best cater to their current and anticipated future needs and interests.

The School publishes two outstanding publications, being, the Foundations Magazine and the annual Sydneian Year Book, the former is sent to more than 14,000 members of the Grammar Community and the latter to the graduating class/Year 12 students.

In January 2011, the Union’s email newsletter formerly called ‘The Alligator’ was renamed to ‘The Black & Gold’ and it is the primary point of our ongoing communication with the members of the Union.

The O.S.U. website is a continuing work in progress and your feedback is not only welcome but very much encouraged.

Please send any queries, questions updates to info@osu.com.au

Reunions reunions@osu.com.au

Mentoring mentoring@osu.com.au

Golf golf@osu.com.au

The Old Sydneians’ Union

ABN: 83 000 207 438

P.O. Box 94

Darlinghurst 2010

New South Wales


++ 61 2 9332 5888

We look forward to your continued support of the Union and its activities

William Dive
Hon. Secretary

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Read the current Black & Gold Newsletter

Provide feedback on the OSU Mentoring Programme


  • September 29, 2016GPS Old Boys Union Golf Day
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5 year Reunions 2016

Call the OSU Alumni on (02) 9332 5888 or email reunions@osu.com.au

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