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李在返回香港後擔任[[房屋署]]副處長，負責機構事務，期間曾與署長[[應耀康]]主動出訪部門各辦公室了解員工工作程況，亦出資贊助部門羽毛球比賽<ref>{{Cite web|url=https://www.housingauthority.gov.hk/tc/about-us/publications-and-statistics/housing-dimensions/article/20150717/20150717_staffcorner.html|title=「機構事務盃」羽毛球比賽結果|date=2015-07-17|work=房屋署|accessdate=2020-12-07|archive-date=2020-12-07|archive-url=https://web.archive.org/web/20201207020230/https://www.housingauthority.gov.hk/tc/about-us/publications-and-statistics/housing-dimensions/article/20150717/20150717_staffcorner.html|dead-url=no}}</ref><ref>{{Cite web|url=https://www.housingauthority.gov.hk/tc/about-us/publications-and-statistics/housing-dimensions/article/20170317/20170317_messagefromthedirector.html|title=署長的話|date=2017-03-17|work=房屋署|accessdate=2020-12-07|archive-date=2020-12-07|archive-url=https://web.archive.org/web/20201207020214/https://www.housingauthority.gov.hk/tc/about-us/publications-and-statistics/housing-dimensions/article/20170317/20170317_messagefromthedirector.html|dead-url=no}}</ref><ref>{{Cite web|url=https://www.housingauthority.gov.hk/tc/about-us/publications-and-statistics/housing-dimensions/article/20170714/20170714_staffcorner.html|title=「機構事務盃」羽毛球比賽|date=2017-07-14|work=房屋署|accessdate=2020-12-07|archive-date=2020-12-07|archive-url=https://web.archive.org/web/20201207020235/https://www.housingauthority.gov.hk/tc/about-us/publications-and-statistics/housing-dimensions/article/20170714/20170714_staffcorner.html|dead-url=no}}</ref>。就[[2015年香港食水管道含重金屬超標事件|2015年資助房屋食水含鉛事件]]，兼任[[香港房屋委員會]]秘書的李需定期對外匯報事件最新情況<ref>{{Cite web|url=https://www.housingauthority.gov.hk/tc/common/pdf/about-us/housing-authority/ha-paper-library/HA1-16.pdf|title=房屋委員會1/2016號文件及策劃小組委員會1/2016號文件|date=2016-01-08|work=香港房屋委員會|accessdate=2020-12-20|archive-date=2020-12-20|archive-url=https://web.archive.org/web/20201220042401/https://www.housingauthority.gov.hk/tc/common/pdf/about-us/housing-authority/ha-paper-library/HA1-16.pdf|dead-url=no}}</ref><ref>{{Cite web|url=https://www.housingauthority.gov.hk/tc/common/pdf/about-us/housing-authority/ha-paper-library/HA7-16.pdf|title=房屋委員會7/2016號文件|date=2016-03-04|work=香港房屋委員會|accessdate=2020-12-20|archive-date=2020-12-20|archive-url=https://web.archive.org/web/20201220042404/https://www.housingauthority.gov.hk/tc/common/pdf/about-us/housing-authority/ha-paper-library/HA7-16.pdf|dead-url=no}}</ref>。雖然受事件困擾，但李仍在2016年中獲安排前往[[哈佛大学]]修讀短期的高階管理課程<ref name="linkedin"/>，並在回港後再繼續跟進鉛水事件<ref>{{Cite web|url=https://www.housingauthority.gov.hk/tc/common/pdf/about-us/housing-authority/ha-paper-library/HA26-17-TC.pdf|title=房屋委員會26/2017號文件|date=2017-09-21|work=香港房屋委員會|accessdate=2020-12-20|archive-date=2020-12-20|archive-url=https://web.archive.org/web/20201220042342/https://www.housingauthority.gov.hk/tc/common/pdf/about-us/housing-authority/ha-paper-library/HA26-17-TC.pdf|dead-url=no}}</ref>。隨後，李2018年1月起轉為出任[[創新科技署]]副署長，協助創科署署長處理創新科技事宜及部門的一切政務<ref name="CfE"/><ref>{{Cite web|url=https://www.info.gov.hk/gia/general/201912/12/P2019121200374.htm|title=立法會政府帳目委員會明日舉行公開聆訊|date=2019-12-12|work=香港特別行政區政府新聞公報|accessdate=2020-12-07|archive-date=2020-12-07|archive-url=https://web.archive.org/web/20201207020236/https://www.info.gov.hk/gia/general/201912/12/P2019121200374.htm|dead-url=no}}</ref><ref>{{Cite web|url=https://www.hk01.com/%E7%A4%BE%E6%9C%83%E6%96%B0%E8%81%9E/350940/|title=生產力局研發分享無人駕駛、仿生機械人 力推5G與智慧出行科技|date=2019-07-11|work=香港01|accessdate=2020-12-20|archive-date=2020-12-20|archive-url=https://web.archive.org/web/20201220042416/https://www.hk01.com/%E7%A4%BE%E6%9C%83%E6%96%B0%E8%81%9E/350940/%E7%94%9F%E7%94%A2%E5%8A%9B%E5%B1%80%E7%A0%94%E7%99%BC%E5%88%86%E4%BA%AB%E7%84%A1%E4%BA%BA%E9%A7%95%E9%A7%9B-%E4%BB%BF%E7%94%9F%E6%A9%9F%E6%A2%B0%E4%BA%BA-%E5%8A%9B%E6%8E%A85g%E8%88%87%E6%99%BA%E6%85%A7%E5%87%BA%E8%A1%8C%E7%A7%91%E6%8A%80|dead-url=no}}</ref>。