Theodore P. Klingos of the Holy Trinity Archdiocesan Cathedral in Manhattan, NY, was invested as Archon in 2009 and conferred with the offikion Referendarios.

Archon Klingos has serves as Treasurer of the Board of Trustees of the Archdiocesan Cathedral. He has also taught Sunday School at the Cathedral for seven years and participated in all Cathedral youth programs. He is a founding member of the Board of the Archdiocesan Youth Choir and has taken a lead role in the Youth Choir ministry for many years, including Youth Choir performances during Patriarchal visits to the United States.

Archon Klingos is a graduate of Pace University with a BA in Finance (1983). He has more than 31 years of experience in the financial services industry with institutions including Fidelity Investments, Citibank, and The Chase Manhattan Bank.

Archon Klingos and his wife, Linda Ann, have one daughter.