Leadership Team

As CEO of TM Forum, Nik is passionate about driving change and the positive impact connectivity can have on business, people, and our planet. Leading the Forum’s value delivery for our members and industry, Nik works closely with the world’s leading executives, experts, and leadership teams across our 800+ member companies to help transform their businesses, accelerate the pace of industry change and enable growth. An industry Power 100 and 40 under 40 alumni, Nik is a frequent writer, speaker and moderator at industry conferences and events.

Appointed CEO in 2017, Nik has led the transformation and growth of the Forum in its ambition to be the industry collaboration platform. Nik previously served as the Deputy CEO and other executive roles, leading the Forum’s first moves in the digital era. Prior to joining TM Forum, Nik ran a successful IT consulting business working with multi-national companies spanning financial services, education, and connectivity sectors.

Olga Martynov has more than ten years of international experience in accounting and finance across different industries. Her diverse background includes supervising audits at KPMG where she supported Fortune 500 clients and global multibillion dollar private companies. Prior to joining TM Forum, Olga led accounting and financial reporting of the fast-growing post-IPO biotech company ContraFect. She has also worked in the EMEA HQ controllership at General Electric, where she was in charge of sixteen counties in the region. Additionally, Olga has expanded her experience by consulting in business and financial strategy, helping clients through M&A activities and structuring collaborations and strategic acquisitions. Olga is a Certified Public Accountant and holds a BS in Accounting and Finance, summa cum laude from Yeshiva University. Olga has also served as a Treasurer on the board of a non-profit organization.

Tim Banham’s extensive sales, sales management and P&L management experience is rooted within the telecoms and technology space. Prior to joining TM Forum, Tim spent 11 years with Informa Telecoms & Media leading the strategy and digital transition of the media businesses, successfully migrating print orientated businesses to digital, launching significant new revenue streams and building highly effective client solutions. Tim also served as a European board member for the BPA Worldwide auditing body.

Helen has over twenty-five years’ board level experience spanning strategy, transformation, communications, and marketing in a range of public and third-sector organisations, including the London Fire Brigade, Brunel University London, Department for Work and Pensions, London Business School and Notting Hill Housing Group. She has extensive experience of building brands, developing partnerships, and achieving growth as well as devising and implementing strategy and cultural, structural and process change. As a non-exec, Helen serves on the board of London South Bank University. She is a qualified coach, project, programme and change manager.

George is an experienced industry thought leader, telecoms professional and business manager with over 32 years expertise in the IT sector in all aspects of software engineering. Having joined the TM Forum in 2018 as VP of Architecture and APIs, George became CTO of the TM Forum in 2020. Through industry collaboration, George is the leading the creation of industry standard architectural and business transformation patterns, Open APIs, AI enabled operational models, self-healing autonomous network services and data models that enable digital service providers to simplify the transformation of their IT and network estate, helping to drive the digital revolution that is happening across all industries today. Prior to joining the TM Forum George was the Chief Systems Architect for BT. George led architectural transformations within BT for over 15 years. Whilst at BT George was an active contributor to the TM Forum, having received an outstanding contributor award in 2016 and was appointed a TM Forum Distinguished Fellow in 2018.

Andy Tiller has over 25 years’ experience in product marketing and product management for telecom suppliers and technology companies. He joined TM Forum in 2017 from Chinese BSS/OSS supplier AsiaInfo, where he built an international product strategy, established a global marketing function and set up the company’s operations in Europe. Previously, Andy held senior positions at ip.access (where he was also a founding board member and director of the Small Cell Forum), ShoZu, and Geneva Technology (acquired by Convergys in 2001).

At TM Forum we believe in recruiting hard-working, exceptional talent, celebrating the diversity of our truly global team. We strive to be true to the TM Forum Way, where we do the right thing and represent our cultural values in everything we do, which enables us to deliver the best for our member companies and team members, providing an opportunity for everyone to grow and succeed.

Gregory Geodjenian is Vice President of Membership at TM Forum, where he brings over 20 years of experience in leading high-performing commercial teams and driving strategic growth initiatives. Since joining TM Forum in 2020, Gregory has been instrumental in expanding the organisation’s global Membership, leveraging his deep understanding of the telecom and digital ecosystems. His visionary leadership has cultivated an environment of trust, collaboration, and innovation, significantly enhancing the Forum’s influence and impact across the industry.

Before joining TM Forum, Gregory spent nine years in the extended leadership team at the GSMA. During his tenure, he was integral to the expansion of GSMA’s Membership and played a key role in fostering industry collaboration and engagement. His commercial acumen and strategic insight were crucial in driving growth and enhancing its value proposition to Members across the globe.

Gregory’s career is marked by his ability to build strong, meaningful relationships, lead high-performing, cross-functional teams, and deliver long-term value for stakeholders. His commitment to TM Forum’s mission and his forward-thinking approach continue to drive the organisation’s success, ensuring its relevance and leadership within the rapidly evolving digital landscape.