In 2016, Gilbert left government and returned to work at Hanover. On his re-appointment, the founder of the consultancy Charles Lewington said:
- 'Dan was one of the brightest hires we made at Hanover. We are delighted to have him back in the fold. His policy knowledge and understanding of Government will be especially valuable as we go through this unprecedented period of uncertainty following the Brexit vote.' 
In 2017 Gilbert was promoted to a directorial role at Hanover. 
After graduating from university, Gilbert worked as a senior researcher to Adam Afriyie MP from 2007 to 2010.
He was a finalist in the 2012 Communique PR awards in the category: 'Young Achiever in Healthcare Communications'. His entry reads:
- 'Against a backdrop of unprecedented government reforms and vast change to the NHS, modern healthcare communicators must deliver programmes that resonate with diverse, time-poor target audiences of policymakers, healthcare professionals, commissioners, patient groups and the public.
- Tangible return on investment is a prerequisite, and communications must deliver real clinical and commercial outcomes for clients. In his first year in consultancy, Daniel achieved all of this in 2011, and for clients with a wide variety of needs, including: national broadcast and print news coverage, stakeholder engagement at the highest level, national and local NHS engagement, and input and shaping of government policy.'
- MWW UK Government chart July 2015, accessed 8 July 2015.
- David Singleton, Lobbyists line up for Tory spad jobs, PublicAffairs, 31 August 2016, accessed 2 December 2016.
- Rod Muir, New generation rises up to run public affairs at Hanover Public Affairs News, 12 December 2017
- Daniel Gilbert Linkedin, accessed 10 October 2014
- [Daniel Gilbert, finalist], Communique Awards, PMLive website, accessed July 2016