Notable Alumni

Bussiness

Lim Kok Thay: Chairman, Genting Group, and Star Cruises.
Yong Poh Kon: Managing Director, Royal Selangor International Sdn. Bhd.

Law

Lai Kew Chai: Former Supreme Court of Singapore Judge
Chooi Mun Sou: Lawyer
James Foong Cheng Yuen: Former Federal Court Judge
Wong Kien Kong: Lawyer, Baker & McKenzie

Public Service

Cheong Choong Kong: Chairman of the Oversea-Chinese Banking Corporation Singapore and former CEO of Singapore Airlines

Politics

Ong Tee Keat: 8th President of the Malaysian Chinese Association, Former Transport Minister of Malaysia
Syed Hamid Albar: Former Home Minister of Malaysia
Raja Nong Chik Zainal Abidin: Former Minister of Federal Territories and Urban Well-Being of Malaysia
Ong Pang Boon: Former Minister for Education of Singapore

Media and Entertainment

Awal Ashaari: Actor and TV host
Faizal Hussein: Actor and TV host
Zainal Abidin Rawop: Sportscaster

Miscellaneous

Gurchan Sigh: Resistance fighter during the Japanese occupation of Malaya and widely known as the "Lion of Malaya"
C. C. Too: Former head of Psychological Warfare Section, Malaya

Current Administration of MBSSKL

Principal: Mr. Brendan Ravi Chandran

Senior Assistant 1(Administration and Curriculum): Loh Tzu Lee
Senior Assistant (Student Affairs): Sanusi bin Ismail
Senior Assistant (Co-curriculum): Jamilah Bt. Mohd Koya
Senior Assistant (Higher Learning): Gan Swit Peng
Senior Assistant (Special Education): Loi Wing Ping

Senior of Languages: Rozana Binti Hashim
Senior of Humanitarian And Social Sciences: Flora Grace Jeevamoney
Senior of Science And Mathematics: Fazliyanee Binti Pakhuruddin
Senior of Technical And Vocational: Norizan Bt. Mohd Daud
Senior of Form 6 Co-Curriculur Activities: Gopala Krishnan
Head of Form 6 Unit of Social Sciences: Victoria Janasamy
Head of Form 6 Unit of Accounts Learning: Khadizah Bt. Jaafar
Head of Form 6 Unit of Science And Mathematics: Yong Wai Ping
Head of Form 6 Unit of Languages: Hajah Mazlini Bt. Mustafa

Chief of English Language Department: Mrs.V.Ramani
Chief of Science Department: Zarul Hirniza
Chief of Sports And Recreation Department: Ramesh Ram Ramalu
Chief of Geography Department: Hasmawati Bt. Hashim
Chief of History Department: Mohd. Rithauddin Bin Muhammad Nor
Chief of Malay Language Department: Zikri Ihsan
Chief of Maths Department: Kee Lai Yee
Chief of Technical Life Knowledge Department: Wan Noorazwany

Former Principles

1897-1899: Dr. William Thomas Kensett, M.D.
1899-1901: Rev. Samuel Abraham
1901-1907: Rev. William Edward Horley, M.B.E.
1908-1912: Mr. Robert T. McCoy, B.Sc
1913: Rev. B.J.Baughman, M.A.
1913: Rev. Walter Guy Parker, M.A.
1914: Rev. Preston Littlepage Peach, M.A.M.M.E.
1915: Rev. George F. Pykett
1915-1919: Rev. Preston L.Peach, M.A.M.M.E.
1919-1924: Rev. Walter Guy Parker, M.A.
1924-1926: Mr. Thomas William Hinch, O.B.E.
1926-1929: Rev. R.A. Blasdell, B.A. (Acting)
1930-1933: Rev. T.W. Bowmar
1934-1937: Rev. Preston L. Peach, M.A.M.M.E.
1938: Rev. W.A. Schurr, M.A.B.D. (Acting)
1939-1941: Rev. Preston L. Peach, M.A.M.M.E.
1942-1944: none- War Period
1945-1946: Mr. S. Kanagaratham (Acting)
1947-1948: Rev. Preston L. Peach, M.A.M.M.E.
1949-1952: Mr. Hugh F. Clancy, B.A.
1950-1951: Mr. T.K. Cheong (Acting)
1952-1955: Dr. Ho Seng Ong, Ed.D, M.A.P.R.G.S.
1955-1968: Mr. T. Mori, R.C.D.
1969-1978: Mr.Tan Hee Heng, R.C.D.
1979-1985: Mr. Yong Chee Seng
1986-1995: Mr. Loh Kung Sing
1995-1996: Mrs. Hew Yoon Yew
1997-2004: Mr. Loo Wan Yong
2004-2005: Ms. Moey Yoke Lai
2005-2017: Mr. Wong Chee Kheon
2017-????: Mr. Brendan Ravi Chandran

School Co-Curricular

In MBSSKL, there are a total of 7 uniform bodies in the school as of  2009. Here are some examples:

10th Kuala Lumpur Air Scouts Group

10th Kuala Lumpur Air Scouts Group was established in 1915 and absorbed 15th Kuala Lumpur, Scouts Troop after the Second World War.

1st Kuala Lumpur Boys' Brigade Company

Founded by Mr. Khoo Onn Soo under the sponsorship of Wesley Methodist Church, Kuala Lumpur in 1954. 1st Kuala Lumpur Boys Brigade was the first of the companies to be established in Kuala Lumpur.

Kuala Lumpur No.6 Ambulance Cadet Division of St. John Ambulance Malaysia

KLN6ACD is a division under St. John Ambulance Malaysia, part of an international volunteer service organization dedicated to training and providing first aid skills. The division has had numerous achievements in competitions at the state and national levels and continues to be a major contributor in voluntary first-aid service within the school as well as public through duties coordinated by the State Officers.