Mark Irwin

Director/Board Member at

Serco Holdings Ltd.

Net worth: 6 M $ as of 31/05/2026

61 year

25 connections

Commercial Services

Industrial Services

Electronic Technology

Profile

Mark W.
Irwin currently works at Serco Holdings Ltd., as Director from 2021.
Mr. Irwin also formerly worked at Serco Group Pty Ltd., as Chief Executive Officer, Serco Group Plc, as Group Chief Executive Officer & Director from 2023 to 2025, Nalco Holding Co., as Group Vice President, China National BlueStar (Group) Co., Ltd., as Chief Operating Officer in 2012, and Nalco Holding Co., as President.
Mr. Irwin received his Masters Business Admin degree from Victoria University.

Known holdings in public companies

Company	Date	Number of shares	Valuation	Valuation date
SERCO GROUP PLC 0.18%	31/12/2025	1,810,193 ( 0.18% )	6 M $	31/05/2026

Mark Irwin active positions

Companies	Position	Start
Serco Holdings Ltd. Serco Holdings Ltd. Miscellaneous Commercial ServicesCommercial Services Operates as a holding company through subsidiaries provides public services	Director/Board Member	14/04/2021

All active positions of Mark Irwin

Former positions of Mark Irwin

Companies	Position	End
SERCO GROUP PLC	Chief Executive Officer	28/02/2025
China National BlueStar (Group) Co., Ltd. China National BlueStar (Group) Co., Ltd. Chemicals: SpecialtyProcess Industries Manufactures chemical materials	Chief Operating Officer	01/12/2012
Nalco Holding Co. /Paper Services Division/	President	-
Serco Group Pty Ltd. Serco Group Pty Ltd. Telecommunications EquipmentElectronic Technology Operates as a defense contractor, provides healthcare facility management and goods transportation services	Chief Executive Officer	-
Nalco Holding Co. Nalco Holding Co. Environmental ServicesIndustrial Services Operates as holding company whose subsidiary provides water treatment and process improvement services	Corporate Officer/Principal	-

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Training of Mark Irwin

Experiences
Positions held

Active

Inactive

Listed companies

Private companies

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Connections

1st degree connections

1st degree companies

Male

Female

Members of the board

Executives

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Linked companies

Private companies	7
Nalco Holding Co. Nalco Holding Co. Environmental ServicesIndustrial Services Operates as holding company whose subsidiary provides water treatment and process improvement services	Industrial Services
Serco Group Plc Serco Group Plc Miscellaneous Commercial ServicesCommercial Services Provides public services	Commercial Services
Serco Group Pty Ltd. Serco Group Pty Ltd. Telecommunications EquipmentElectronic Technology Operates as a defense contractor, provides healthcare facility management and goods transportation services	Electronic Technology
China National BlueStar (Group) Co., Ltd. China National BlueStar (Group) Co., Ltd. Chemicals: SpecialtyProcess Industries Manufactures chemical materials	Process Industries
Victoria University Victoria University Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Nalco Holding Co. /Paper Services Division/
Serco Holdings Ltd. Serco Holdings Ltd. Miscellaneous Commercial ServicesCommercial Services Operates as a holding company through subsidiaries provides public services	Commercial Services