Sigma Operational Leadership Team

Graham Barnet is the Founder and Chief Executive Officer of Sigma Capital, which he established in 1996. An experienced corporate financier and qualified lawyer, he has extensive expertise in residential property investment and development and is the architect of The PRS REIT plc, the first listed UK REIT focused on new family rental homes. He leads the firm’s strategic direction and investment philosophy, working closely with investors and partners to deliver long-term value.

Over 10 years’ experience in senior finance roles across private and listed companies, spanning sectors including distribution and residential development. Extensive expertise in financial planning, business integration, and transactional projects. A strong business partner, delivering critical financial insight and supporting decision-making across all areas of the organisation.
Qualified Chartered Accountant (PwC-trained) and Associate Member of the Association of Corporate Treasurers.

Jack works closely with the CEO to support the strategic leadership and operational delivery of the business. He focuses on translating the firm’s investment philosophy and corporate strategy into clear, actionable plans across operational teams, ensuring alignment, strong performance, and effective cross-departmental coordination.
Jack plays an active role in transaction execution, investment analysis, and the management of institutional investor and partner relationships. He specialises in UK Single-Family Housing and Build-to-Rent, with experience across equity raising and joint-venture structuring, Jack has supported and executed approximately £1.75bn of transactions at Sigma Capital Group.

Steven is a qualified member of the Royal Institution of Chartered Surveyors and joined Sigma in 2016 ahead of the launch of The PRS REIT. He secured and delivered the first Single Family rental sites in the West Midlands and subsequently helped expand Sigma’s BTR model into the Southern region. Steven has been instrumental in the acquisition and delivery of Sigma’s owned assets, now exceeding £1.1bn in value. In 2020, he was part of the founding team that launched Sigma’s first multifamily joint venture with EQT Exeter, which has since grown to over £800m GAV. Prior to joining Sigma, Steven worked as a registered valuer in Scotland. Outside of work, he enjoys keeping fit and playing golf.

Based in the Edinburgh office, Kenny joined Sigma Capital in 2019 having previously spent 10 years’ advising across commercial capitals markets.

Since joining, he has spent time on the operational side of the business before growing his role within the development team. Kenny has been responsible for managing housebuilder relationships, and contributing to the formation of the companies SFH strategy by underwriting and acquiring assets across Scotland, the North East, Yorkshire and the Midlands.

He holds a MA in Property from the University of Aberdeen and is MRICS accredited.

Jason Berry has over 30 years’ experience in senior Technical Director roles with leading national housebuilders. He provides critical development delivery, technical and planning leadership across the business, supporting strategic site acquisitions and overseeing regional operations to ensure the efficient delivery of all development schemes.

Alec joined Sigma in January 2019, bringing over 16 years of experience and knowledge. He leads the delivery of development schemes across the Northwest, Yorkshire & Midlands, working closely with our consultants and housebuilding partners to drive the efficient delivery of high-volume Build to Rent housing schemes.
Across his time at Sigma, Alec has been responsible for the delivery of more than 3,000 units across 46 schemes, representing over £490 million of capital deployed across a number of the company’s portfolios - a testament to his hands-on approach and commitment to delivering at scale.

Stuart leads the development management function in London and the South, overseeing the delivery of both the London-based multifamily joint venture with EQT Exeter, as well as Sigma’s own projects within the Southern region, which combined consists of c.2,000 units. Within his role, Stuart proactively oversees the successful delivery of projects in collaboration with internal stakeholders, development partners, and external consultant teams. He brings nearly 15 years of experience in delivering new-build residential projects for a diverse range of clients and has been a Chartered Quantity Surveyor since 2021.

Mike Scott is Corporate Development Director and Group Legal Counsel at Sigma Capital Group. With over 25 years’ experience in corporate finance and structuring, he is a senior transactional lead on both corporate and debt matters, having played a key role in major equity raises, joint ventures and over £1.5bn of development and investment financing. Alongside his transactional responsibilities, Mike leads Sigma’s in-house legal function, overseeing litigation, employment matters, group structuring, regulatory and GDPR compliance across the Group.

Katy is a dual-qualified solicitor in England & Wales and Scotland with over 20 years’ experience in real estate. She joined Sigma in 2016 and is responsible for managing the real estate aspects of site acquisitions and debt financing for Sigma. She was involved in the accelerated deployment of £500m of capital raised by The PRS REIT PLC following its inception in 2017 and managed the acquisition of all 16 apartment blocks into Sigma’s joint venture multi family fund with EQT Exeter.

Leanne has over 20 years’ experience across private practice and in-house roles, including 10 years in private practice working within the Corporate, Banking, Employment and Restructuring sectors, with a particular focus on company secretarial services. She joined Sigma in 2016 and is responsible for managing all company secretarial matters, supporting board operations and ensuring compliance with corporate governance standards across the group. In addition, Leanne oversees the company’s HR function, working alongside the senior leadership team to support people strategy and organisational growth, bringing a practical and experienced approach to leadership and delivery.

Marketing leader with 15+ years’ experience across advertising and marketing, on both agency and client sides. Leads the full marketing function for Sigma, Simple Life, and Simple Life London, overseeing brand strategy, customer experience, resident engagement and community, site lease-up activity, lettings support, and digital and technical innovations. Skilled in guiding integrated teams to deliver consistent, high-impact marketing across diverse portfolios.

Gurpreet has over 12 years’ experience across the Build to Rent asset classes, with deep expertise in lettings, property management, and block management. Gurpreet undertakes feasibility studies on future Multi-Family BTR schemes with the Investment team and feeds into design and build asset management strategies. He is responsible for the onboarding, mobilisation, and ongoing management of London-based assets. He also oversees the financial performance of the London portfolio, ensuring operational efficiency and a strong gross-to-net outcome.