So further to my previous SPiN post about its fondness for locations with tunnels, I thought we should look at who else has access to the Park Avenue tunnel system:

MI6, a death in China and the very secretive Mayfair company full of spooks http://archive.is/GSUG#selection-841.1-841.76

Labelled a ‘convenient rest home’ for spies, Hakluyt had always managed to stay in the shadows - until a top intelligence operator lost his life in murky circumstances. 

Hakluyt was founded 17 years ago by Christopher James, a former SAS and MI6 operative, and Christopher Wilkins, a businessman who had served in the Welsh Guards. The links between the company and MI6 have always been strong. Spies preparing for retirement are approached discreetly in St James’s clubs and asked if they would like some lucrative freelance action to top up their pensions.

Hakluyt regards itself as operating at the top end of one of the capital’s most lucrative service industries. It has the most impressive list of big corporations, with particularly close links to the big oil firms.

Hakluyt on Park Avenue: https://www.intelligenceonline.com/corporate-intelligence_consultants/2013/07/10/hakluyt-on-park-avenue,107968593-art

Holdingham, the parent company of British corporate intelligence outfit Hakluyt

https://www.bloomberg.com/research/stocks/private/people.asp?privcapId=216866488

Vice-Chairman of Holdingham Amaury-Daniel de Seze with 79 relationships – check them out: https://www.bloomberg.com/research/stocks/people/relationship.asp?personId=131976&ticker=PWF:CN&previousCapId=216866488&previousTitle=Holdingham%20Group%20Limited

For example, lots of affiliations with Groupe Bruxelles Lambert SA - voat related posts:

Dutroux elite pedo ring cover-up casefiles describing gruesome murders of children and babies

The ICMEC, the Belgian Connection and the Dutroux Scandal - Hiding in Plain Sight - Part 3

and a very interesting post by @SeekNuShallFind :

FUSION: Hakluyt & Company - was founded by an trio of former British intelligence operatives that connect to Hillary Clinton.

https://archive.fo/UFV5s :

Hakluyt’s style appears to be much more in the mould of the Christopher Steele dossier. ..

Control Risks represents what might be seen as the private security arm of this sector. The firm was prominent in post-invasion Iraq, protecting British diplomats and providing daily risk assessments, earning £112 million in three years for its work with the FCO alone. Founded by former SAS officers in the mercenary boom of the 1970s, Control Risks has become a market leader in the world of political risk consultancy.  ..

Kate and Gerry McCann also hired the firm’s operatives to assist in the hunt for their daughter in Morocco and Spain, angering Portuguese police and judiciary.

Uh huh...

If Hakluyt represents the Spooks end of the investigations trade, then Diligence is more Hustle. Set up by former members of the Special Boat Service and the CIA, the firm’s early days took on the more adventurous side of the industry. It has major offices in London and New York.

More on Hakluyt here: http://powerbase.info/index.php/Hakluyt

So, I can't find the Park Avenue address for Hakluyt but the company gives its NY address as 540 Madison Avenue which is just around the corner and virtually next to the Core Club which is on Park Avenue though it's official address is 66 East 55th Street New York, NY 10022 . You can see that here

In New York, Portals to Power - https://www.nytimes.com/2011/06/19/fashion/new-yorks-core-club-a-portal-to-power.html

The Core club “does a strong power lunch,” said Pablo De Ritis, the club’s cultural curator. For that matter, it does a strong power breakfast, power cocktails and power tea. The latter is often taken in the club’s stylish library or in a conference dining room fitted out with state-of-the-art teleconferencing technology, along with a secret entrance and private stairway to accommodate members who travel with security details.

See:  NYC - Core Club: $50K Initiation Fee - Overnight Suites - Secret Entrance - Members: Clinton, Burkle, Ghislaine Maxwell, Rothschild - Focus on Modern "Art," Which May be Involved in Child Trafficking

Apparently 55th Street houses a ventilation structure for the tunnels. See North American Tunneling 2004: Proceedings of the North American Tunneling

Other interesting Park Avenue locations :

• the Seagram Building at 375 Park Avenue : https://www.voat.co/v/pizzagate/2973511/16130736

Aby Rosen, owner of the Seagram Building (also co-founder of Core Club)

• 345 Park Avenue building houses: the Blacksone Group; Capital Trust; and Rudin Management among others..

• And right next to SpiN is PJT Partners at 280 Park Avenue : https://en.wikipedia.org/wiki/PJT_Partners – a spin off of the Blackstone Group

he firm's restructuring business has completed over $1.9 trillion worth of deals since inception[14] and was ranked #1 globally and in the U.S. for both announced and completed restructuring deals for the first quarter of 2016. Notable restructuring and special situations clients include Ford, General Motors, Goodyear, BCBGMAXAZRIA, Chiquita, Kodak, Hostess Brands, Mrs. Fields' Original Cookies, Xerox, Arch Coal, CHC Helicopter, TXU Energy, Enron, Evergreen Solar, General Electric, Key Energy, Linn Energy, Odebrecht, Penn Virginia, Samson Resources, Walter Energy, American International Group (AIG), Bear Stearns, Kaupthing, Lehman Brothers, Four Seasons Health Care, Vencor, Bally, Los Angeles Dodgers, Six Flags, Cengage, Dow Corning, Molycorp, Noranda Aluminum, Verso Corporation, AT&T Canada, Comcast, Avaya, iHeartMedia, Motorola, NII Holdings, Nortel, Tribune Media, Vivacom, Detroit, Dubai World, Greece, Iceland, Kansas, Puerto Rico, Ukraine, Caesars Entertainment Corporation, Kerzner International Resorts, Barneys New York, Macy's, Inc., Jack Wolfskin, J. C. Penney, Sears, Quiksilver, Sports Authority, Ultrapetrol, Aeroméxico, American Airlines, Delta Air Lines, Gol Transportes Aéreos, Kenya Airways.