Sigma Advanced Systems adds two directors as three resign

On November 6, 2026, Sigma Advanced Systems Limited appointed Galla Jayadev and Urkavalan Jeya Santhi as additional independent directors while noting the resignations of three directors, alongside new chairman, vice chairman and managing director designations approved at a board meeting held from 2:50 p.m. to 4:50 p.m.

Who did Sigma Advanced Systems appoint to its board?

Sigma Advanced Systems appointed Galla Jayadev as an Independent Director, Non-Executive and Additional Director with effect from November 6, 2026. On the same date, it appointed Urkavalan Jeya Santhi as an Independent Woman Director, Non-Executive and Additional Director. Both were appointed at the November 6 board meeting.

The appointments bring two distinct professional backgrounds to the board. Jayadev has been associated with Amara Raja Energy & Mobility Limited as a co-founder since 1985 and joined its board in 1994. Santhi has more than 36 years of experience in the Defence Research and Development Organisation, or DRDO, covering cryptology, information security, signals and speech analysis, and quantum communications.

What experience does Galla Jayadev add to Sigma Advanced Systems?

Jayadev brings business-management, strategic-planning and industry-development experience, according to Sigma Advanced Systems. Its disclosure says he served Amara Raja Energy & Mobility in several capacities, including managing director, and that the company crossed turnover of Rs 10,000 crore during his association with it.

His profile includes roles at the Confederation of Indian Industry, or CII, at state, regional and national levels. He has been national chair of CII Young Indians and chair of the CII Andhra Pradesh State Council, and is currently a CII National Council member. Sigma Advanced Systems also said he represents the Amara Raja Group at the World Economic Forum annual meeting and serves as its Electricity Industry Governor.

Jayadev served two terms as a Lok Sabha Member of Parliament representing the Guntur constituency. The company said his parliamentary committee work covered information technology, defence, commerce and external affairs, alongside consultative committees on power, new and renewable energy, and housing and urban affairs. He holds a bachelor's degree in Political Science and Economics from the University of Illinois at Urbana-Champaign.

Sigma Advanced Systems disclosed that Jayadev is not related to any of its directors. It also confirmed, under an exchange circular dated June 20, 2018, that he is not debarred from serving as a director by an order of the Securities and Exchange Board of India, or SEBI, or another authority.

What defence background does Urkavalan Jeya Santhi bring?

Santhi brings more than 36 years of DRDO experience to Sigma Advanced Systems. Her disclosed expertise includes cryptology, information security, signals and speech analysis, and quantum communications. She previously held the roles of Director of the Scientific Analysis Group and Director General, Human Resources, at DRDO headquarters.

As Director General, Human Resources, she oversaw strategic research initiatives and human-resource management across more than 50 DRDO establishments, according to the filing. Since July 2025, she has served as Director of the DRDO Industry Academia-Centre of Excellence at the Indian Institute of Technology Delhi, leading collaboration on indigenous research, quantum communications and defence-technology development.

Santhi holds a postgraduate qualification in Computer Science and Engineering from PSG College of Technology, Coimbatore, and a bachelor's degree in Electronics and Communication Engineering from Government College of Technology, Coimbatore. The disclosure lists the DRDO Special Award for Strategic Contribution, the Scientist of the Year Award and the DRDO Award for Performance Excellence among her recognitions.

She is a Governing Council Member, Fellow and Vice President of the Aeronautical Society of India. Sigma Advanced Systems said she is not related to any company director and is not debarred from holding a directorship under the June 20, 2018 exchange circular, while her November 6, 2026 appointment specifically adds an Independent Woman Director.

How did Sigma Advanced Systems change its leadership roles?

Sigma Advanced Systems designated Lieutenant General Retired Raju Somashekar Baggavalli, an existing Non-Executive Independent Director, as chairman of the board from November 6, 2026. The filing describes Baggavalli as having nearly four decades of senior leadership, governance and strategic decision-making experience, including service as Vice Chief of the Army Staff.

Kartheek Raju Chintalapati was designated vice chairman from November 6, 2026 and was approved for redesignation from Non-Executive Director to Whole-Time Director, Executive and Promoter. His whole-time appointment is for five years from November 6, 2026, subject to shareholder approval at the ensuing general meeting.

Sunil Kumar Kalidindi was redesignated from Whole-Time Director to Managing Director at the same November 6 meeting. The changes therefore combined two new independent appointments and three resignations with three leadership actions: a chairman designation, a vice chairman designation and a managing director redesignation.

The distinction between the leadership changes is material in the disclosure. Baggavalli remained identified as an independent non-executive director when designated chairman, while Chintalapati's proposed five-year whole-time role changes his status from non-executive to executive promoter, pending the stated shareholder approval.

What approvals and capital plan did Sigma Advanced Systems disclose?

Sigma Advanced Systems approved a notice of postal ballot on November 6, 2026. The filing specifically says Chintalapati's five-year appointment as Whole-Time Director requires shareholder approval at the ensuing general meeting; it does not disclose the outcome or timetable for that approval.

The board also approved raising up to Rs 3,000 crore in one or more tranches through equity shares or other eligible securities. The possible routes named were a further public offer, preferential allotment, rights issue, private placement and qualified institutions placement, with timing, pricing and terms to be determined later by the board or a duly constituted committee.

The potential Rs 3,000 crore issue remains subject to shareholder, regulatory and other required approvals. Sigma Advanced Systems did not disclose an instrument mix, issue price, investor list or date for a transaction, so the approval establishes a funding ceiling rather than a completed capital raise.

At the November 6 meeting, Sigma Advanced Systems also approved unaudited standalone and consolidated results for the quarter and half year ended September 30, 2026. It said extracts would be published in English and Tamil newspapers within the stipulated period, while the complete results would be available through the company and stock-exchange websites.

Conclusion

The November 6, 2026 actions represent a broad change in Sigma Advanced Systems' board composition and leadership structure. Jayadev adds experience associated with business leadership and industry bodies, while Santhi adds a disclosed 36-plus-year DRDO research and management background; their appointments occurred as three directors' resignations were noted and senior titles were reassigned.

The next disclosed matters to watch are the postal ballot and shareholder decision on Chintalapati's five-year whole-time directorship, plus any subsequent board or committee action under the Rs 3,000 crore fundraising approval. Sigma Advanced Systems has not disclosed the timing, pricing, security type or investors for a potential issuance.