Leadership Team

OGS’s leadership team have extensive experience and specialised knowledge in their respective fields and the industry. Their role is to enhance the medium to long-term strategic direction of the company.


Greg Forbes

Chairman and Director

Having successfully started, developed and sold several companies forming the mainstay of international companies within Australia post acquisition, his business management and development experience now exceeds 25 years.

Greg has established several successful businesses from concept to revenues in excess of $250M, as well as taking established lines of business in a major corporate through significant growth.

Jason Antunovich

Jason Antunovich

Global CEO and Director

Jason is a practical executive with extensive experience in the engineering industry spanning 30 years in the oil & gas and mining sectors.

The experience has been gained through a wide array of projects throughout Australia and overseas working in design, system analysis, construction, commissioning.

Jason’s focus is now business development and company management and he holds a number of board roles with service and technology companies.

Paul Roberts​

Paul Roberts


Paul is a qualified accountant (CGMA, CMA, CPA. MAAT) and brings to the team over 20 years of Australian and International experience in a number of key financial roles at both ASX listed and private companies.

Paul comes to the team with a strong financial, commercial and business analytical skills combined with proven effective leadership of finance teams. Paul has significant experience in managing working capital requirements of growth businesses with an international footprint.

Paul is a member of Australian Society of Certified Practising Accountants, Chartered Institute of Management Accountants & Association of Accounting Technicians.

Peter Winterbourne​

Peter Winterbourne


Twenty five years in the offshore and onshore Oil and Gas industry, initially in process engineering and transitioning through project/delivery management to senior business unit management positions.

Peter has spent the last 18 years with Offshore Design Limited (ODL), later know as Wood Group ODL where he gained extensive experience in the delivery of asset operations and maintenance management consultancy services and the development of procedural documentation.

Peter has achieved success in a number of different and demanding positions, obtaining both hands-on and managerial experience that spans the management of multi-disciplined consultancy, engineering and design projects, the development of new technologies and also corporate management.


Anne Zurzolo

Corporate Culture Operations Manager

Anne has over 15 years of experience across a wide range of industries: Engineering, Oil & Gas, Resources and Finance. Anne has played a core role in culture and operations during her 10+ years with OGS, leading the Culture and Human Resources team to deliver strategy, policies and processes at the highest standard within the organisation. Anne’s role on the Executive Team also means she plays a pivotal part in attracting, retaining and motivating the OGS Global workforce to maintain and emulate the unique values-based culture.

Along with her passion for project enablement and changing the way projects are delivered, her quality knowledge and management of OGS ISO certifications make her an asset to the team and a champion for continuous improvement at OGS.

Peter Collins​

Peter Collins

Co-Founder and Strategic Advisor

Forty years plus experience primarily in the onshore and offshore Oil & Gas Industry, including LNG in a wide variety of roles, primarily in the Engineering and Construction world and in the latter years in more of the Public & Investor Relations/M&A/Business Development (BD) role.

His last major permanent role being Group Manager of Business Development at Clough Limited. Peter also held the Group Manager Corporate Affairs role for 3 years in his 15 years at Clough. Other previous permanent employers being Kaiser, Foxboro, Worsley Alumina and BHP. He currently has other part-time roles with Seatrax & Eaton Square.

Peter is a Fellow of the Australian Institute of Company Directors.

Sean Cully

Operations Manager

Sean Cully is an experienced Operations Manager with over a decade of expertise in integrated commissioning consultancy and project management. His leadership style effectively guides projects from tender to commissioning. Sean’s extensive experience spans railway, oil and gas, mining, and energy industries, making him a valuable asset to our team.

Prior to this, Sean served as the Program Manager at Wabtec Control Systems, leading important projects, including the design and delivery of the METRONET Morley to Ellenbrook Line, construction of the Kenwick Flashbutt Facility, and Rio Tinto Hot Bearing Detector Upgrade.

Sean is known for his meticulous approach, focusing on safety, quality, environmental compliance, and financial responsibility. He is more than just an Operations Manager; he is a dedicated leader committed to shaping the future with excellence.

Damian Lepidi

HSE Manager

A highly experienced professional and Health Safety and Environmental (HSE) Manager with more than 20 years of industry experience in both an Australian and international context. Professional success involved developing a comprehensive understanding of the construction and operational aspects of live gas / major hazard (brownfield) facilities, including essential safety systems and high-rise construction while working for world-leading clients such as Woodside, Wood Group PSN, Worley Parsons, BP, Origin Energy, Santos and Oman Oil Company Exploration and Production (OOCEP) and Multiplex.

Possessing a positive personality and the ability to work in harsh and isolated environments, while forming lasting professional and personal connections with co-workers from different socio-economic, religious and cultural backgrounds.

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